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Zhao X, Xu H, Chen M, Chen Y, Kong X. Enhancement of norfloxacin degradation by citrate in S-nZVI@Ps system: Chelation and FeS layer. Environ Res 2024; 245:117981. [PMID: 38142729 DOI: 10.1016/j.envres.2023.117981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 12/02/2023] [Accepted: 12/16/2023] [Indexed: 12/26/2023]
Abstract
The degradation of organic pollution by sulfur-modified nano zero-valent iron(S-nZVI) combined with advanced oxidation systems has been extensively studied. However, the low utilization of nZVI and low reactive oxygen species (ROS) yield in the system have limited its wide application. Herein, a natural organic acid commonly found in citrus fruits, citric acid (CA), was combined with the conventional S-nZVI@Ps system to enhance the degradation of norfloxacin (NOR). The addition of CA increased the NOR removal by about 31% compared with the conventional S-nZVI@Ps system under the same experimental conditions. Among them, the enhanced effect of CA is mainly reflected in its ability to promote the release of Fe2+ and accelerate the cycling of Fe2+ and Fe3+ to further improve the utilization of nZVI and the generation of ROS; it also promotes the dissolution of the active substance (FeS) on the surface of S-nZVI to further improve the degradation rate of NOR. More importantly, the chelate of CA and Fe2+ (CA-Fe2+) had higher reactivity than alone Fe2+. Free radical quenching and electron spin resonance (ESR) experiments indicated that the main ROS for the degradation of NOR in the CA/S-nZVI@Ps system were SO4•- and OH•. CA-bound sulfur-modifying effects on NOR degradation was systematically investigated, and the degradation mechanism of NOR in CA/S-nZVI@Ps system was explored by various techniques. Additionally, the effect of common anions in water matrix on the degradation of NOR in CA/S-nZVI@Ps system and its degradation of various pollutants were also studied. This study provides a new perspective to enhance the degradation of pollutants by S-nZVI combined with advanced oxidation system, which can help to solve the application boundary problem of S-nZVI.
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Affiliation(s)
- Xuefang Zhao
- College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou, 730050, China.
| | - Hui Xu
- College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou, 730050, China.
| | - Minzhang Chen
- College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou, 730050, China
| | - Yong Chen
- College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou, 730050, China
| | - Xiuqing Kong
- College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou, 730050, China.
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Porfirio MCP, Santos JB, Alves AN, Santos LS, Bonomo RCF, da Costa Ilhéu Fontan R. Purification of pineapple bromelain by IMAC chromatography using chlorophyll-activated macroporous matrices. J Chromatogr B Analyt Technol Biomed Life Sci 2024; 1234:124027. [PMID: 38320436 DOI: 10.1016/j.jchromb.2024.124027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 01/08/2024] [Accepted: 01/20/2024] [Indexed: 02/08/2024]
Abstract
This study investigated the purification of bromelain obtained from pineapple fruit using a new adsorbent for immobilized metal ion affinity chromatography (IMAC), with chlorophyll obtained from plant leaves as a chelating agent. The purification of bromelain was evaluated in batches from the crude extract of pineapple pulp (EXT), and the extract precipitated with 50 % ammonium sulfate (EXT.PR), the imidazole buffer (200 mM, pH 7.2) being analyzed and sodium acetate buffer, pH 5.0 + 1.0 NaCl as elution solutions. All methods tested could separate forms of bromelain with molecular weights between ±21 to 25 kDa. Although the technique using EXT.PR stood out in terms of purity, presenting a purification factor of around 3.09 ± 0.31 for elution with imidazole and 4.23 ± 0.12 for acetate buffer solution. In contrast, the EXT methods obtained values between 2.44 ± 0.23 and 3.21 ± 0.74 for elution with imidazole and acetate buffer, respectively, for purification from EXT.PR has lower yield values (around 5 %) than EXT (around 15 %). The number of steps tends to reduce yield and increase process costs, so the purification process in a monolithic bed coupled to the chromatographic system using the crude extract was evaluated. The final product obtained had a purification factor of 6, with a specific enzymatic activity of 59.61 ± 0.00 U·mg-1 and a yield of around 39 %, with only one band observed in the SDS-PAGE electrophoresis analysis, indicating that the matrix produced can separate specific proteins from the total fraction in the raw material. The IMAC matrix immobilized with chlorophyll proved promising and viable for application in protease purification processes.
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Affiliation(s)
- Márjorie Castro Pinto Porfirio
- Process Engineering Laboratory, the State University of Southwest Bahia, BR 415, km 04, s/n, 45700-000 Itapetinga, BA, Brazil
| | - Jonathan Barbosa Santos
- Process Engineering Laboratory, the State University of Southwest Bahia, BR 415, km 04, s/n, 45700-000 Itapetinga, BA, Brazil
| | - Annie Nolasco Alves
- Process Engineering Laboratory, the State University of Southwest Bahia, BR 415, km 04, s/n, 45700-000 Itapetinga, BA, Brazil
| | - Leandro Soares Santos
- Process Engineering Laboratory, the State University of Southwest Bahia, BR 415, km 04, s/n, 45700-000 Itapetinga, BA, Brazil
| | - Renata Cristina Ferreira Bonomo
- Process Engineering Laboratory, the State University of Southwest Bahia, BR 415, km 04, s/n, 45700-000 Itapetinga, BA, Brazil
| | - Rafael da Costa Ilhéu Fontan
- Process Engineering Laboratory, the State University of Southwest Bahia, BR 415, km 04, s/n, 45700-000 Itapetinga, BA, Brazil.
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Alnimer AA, Smith DS, Parker WJ. Phosphorus release and recovery by reductive dissolution of chemically precipitated phosphorus from simulated wastewater. Chemosphere 2023; 345:140500. [PMID: 37866501 DOI: 10.1016/j.chemosphere.2023.140500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Revised: 09/26/2023] [Accepted: 10/19/2023] [Indexed: 10/24/2023]
Abstract
Chemically mediated recovery of phosphorous (P) as vivianite from the sludges generated by chemical phosphorus removal (CPR) is a potential means of enhancing sustainability of wastewater treatment. This study marks an initial attempt to explore direct P release and recovery from lab synthetic Fe-P sludge via reductive dissolution using ascorbic acid (AA) under acidic conditions. The effects of AA/Fe molar ratio, age of Fe-P sludge and pH were examined to find the optimum conditions for Fe-P reductive solubilization and vivianite precipitation. The performance of the reductive, chelating, and acidic effects of AA toward Fe-P sludge were evaluated by comparison with hydroxylamine (reducing agent), oxalic acid (chelating agent), and inorganic acids (pH effect) including HNO3, HCl, and H2SO4. Full solubilization of Fe-P sludge and reduction of Fe3+ were observed at pH values 3 and 4 for two Fe/AA molar ratios of 1:2 and 1:4. Sludge age (up to 11 days) did not affect the reductive solubilization of Fe-P with AA addition. The reductive dissolution of Fe-P sludge with hydroxylamine was negligible, while both P (95 ± 2%) and Fe3+ (90 ± 1%) were solubilized through non-reductive dissolution by oxalic acid treatment at an Fe/oxalic acid molar ratio 1:2 and a pH 3. With sludge treatment with inorganic acids at pH 3, P and Fe release was very low (<10%) compared to AA and oxalic acid treatment. After full solubilization of Fe-P sludge by AA treatment at pH 3 it was possible to recover the phosphorus and iron as vivianite by simple pH adjustment to pH 7; P and Fe recoveries of 88 ± 2% and 90 ± 1% respectively were achieved in this manner. XRD analysis, Fe/P molar ratio measurements, and magnetic attraction confirmed vivianite formation. PHREEQC modeling showed a reasonable agreement with the measured release of P and Fe from Fe-P sludge and vivianite formation.
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Affiliation(s)
- Aseel A Alnimer
- Department of Chemistry and Biochemistry, Wilfrid Laurier University, 75 University Ave. W., Waterloo, N2L 3C5, ON, Canada.
| | - D Scott Smith
- Department of Chemistry and Biochemistry, Wilfrid Laurier University, 75 University Ave. W., Waterloo, N2L 3C5, ON, Canada
| | - Wayne J Parker
- Department of Civil and Environmental Engineering, University of Waterloo, 200 University Ave. W., Waterloo, N2L 3G1, ON, Canada
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Clematis D, Skolotneva E, Cademartori D, Panizza M. Impact of catalyst, chelating agent and light irradiation on electro-Fenton performance under not optimal conditions. Chemosphere 2023; 344:140408. [PMID: 37827461 DOI: 10.1016/j.chemosphere.2023.140408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 09/09/2023] [Accepted: 10/09/2023] [Indexed: 10/14/2023]
Abstract
Electro-Fenton is a promising game-changer for distributed wastewater treatments for the removal of recalcitrant compounds that it is possible to find in industrial effluent and looking for a water reuse approach. This electrochemical advanced oxidation process (EAOPs) is able to provide fast removal of organic compounds, like dyes, due to the in-situ H2O2 production and its reaction with Fe2+ to form hydroxyl radicals. The literature clearly reports that this reaction reaches its optimum in acid conditions (pH = 3) and low catalyst concentrations [Fe2+<0.5 mM]. This paper wants to investigate the effects of the shifting from optimal conditions on the removal of reactive black 5 (RB5), treating solutions which contain a higher amount of catalyst and a less acid pH. Textile effluents usually contain also other metals able to act as catalyst for Fenton reaction, like copper. Here its activity has been investigated as well as the possible synergistic effect with Fe2+. The results confirm that copper can enhance RB5 removal, especially in those conditions critical for ferrous cation. In the second part, possible process modifications to overcome the issues introduced by unfavourable operating conditions (pH > 3 and Fe2+ > 0.5 mM) are considered, such as the usage of a chelating agent (EDTA) and the application of a light source. The results show the positive impact of these two system modifications highlighting the possibility to enlarge the application window of electro-Fenton systems.
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Affiliation(s)
- Davide Clematis
- University of Genoa, Department of Civil, Chemical and Environmental Engineering, Via All'Opera Pia 15, 16145, Genova, Italy
| | - Ekaterina Skolotneva
- University of Genoa, Department of Civil, Chemical and Environmental Engineering, Via All'Opera Pia 15, 16145, Genova, Italy
| | - Davide Cademartori
- University of Genoa, Department of Civil, Chemical and Environmental Engineering, Via All'Opera Pia 15, 16145, Genova, Italy
| | - Marco Panizza
- University of Genoa, Department of Civil, Chemical and Environmental Engineering, Via All'Opera Pia 15, 16145, Genova, Italy.
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Laurène W, Raúl L, Katalin S, Céline F, Gilles K, Antonio M, Charlotte C, Samir A. Design and synthesis of a new bifunctional chelating agent: Application for Al 18F/ 177Lu complexation. J Inorg Biochem 2023; 246:112267. [PMID: 37329775 DOI: 10.1016/j.jinorgbio.2023.112267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 05/09/2023] [Accepted: 05/23/2023] [Indexed: 06/19/2023]
Abstract
Theranostic and personalized medicine are blooming strategies to improve oncologic patients' health care and facilitate early treatment. While 18F-radiochemistry for theranostic application is attractive due to its imaging properties, combining diagnosis by positron emission tomography (PET) via aluminum-fluoride-18 and β- therapy with lutetium-177 is relevant. Nevertheless, it requires the use of two different chelating agents, which are NOTA and DOTA for aluminum-fluoride-18 and lutetium-177 radiolabeling, respectively. To overcome this issue, we propose herein the synthesis of a new hybrid chelating agent named NO2A-AHM, which can be labeled with different types of emitters (β+, β- and γ) using the mismatched Al18F/177Lu pair. NO2A-AHM, is based on a hydrazine moiety functionalized by a NOTA cycle, a chelating arm, and a linker with a maleimide function. This design is chosen to increase the flexibility and allow the formation of 5 up to 7 coordination bonds with metal ions. Moreover, this agent can be coupled to targeting moieties containing a thiol function, such as peptides, to increase selectivity towards specific cancer cells. Experimental complexation and computational chemistry studies are performed to confirm the capacity of our chelating agent to label both aluminum-fluoride and lutetium using molecular modeling approaches at Density Functional Theory (DFT) level. The proof of concept of the ability of NO2A-AHM to complex both aluminum-fluoride-18, for PET imaging applications, and lutetium-177 for radiotherapy has shown encouraging results which is prominent for the development of a fully consistent theranostic approach.
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Affiliation(s)
- Wagner Laurène
- Université de Lorraine, CNRS, LCPM, F-54000 Nancy, France; Nancyclotep, Plateforme d'imagerie moléculaire, F-54511 Vandœuvre-lès-Nancy, France
| | - Losantos Raúl
- Université Paris Cité, CNRS, ITODYS, F-75006 Paris, France; Department of Chemistry, CISQ, Universidad de La Rioja, 26004 Logroño, Spain
| | | | - Frochot Céline
- Université de Lorraine, CNRS, LRGP, F-54000 Nancy, France
| | - Karcher Gilles
- Nancyclotep, Plateforme d'imagerie moléculaire, F-54511 Vandœuvre-lès-Nancy, France
| | - Monari Antonio
- Université Paris Cité, CNRS, ITODYS, F-75006 Paris, France
| | - Collet Charlotte
- Nancyclotep, Plateforme d'imagerie moléculaire, F-54511 Vandœuvre-lès-Nancy, France; Université de Lorraine, INSERM, IADI, F-54000 Nancy, France.
| | - Acherar Samir
- Université de Lorraine, CNRS, LCPM, F-54000 Nancy, France.
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Khare S, Singhal A, Rai S, Rallapalli S. Heavy metal remediation using chelator-enhanced washing of municipal solid waste compost based on spectroscopic characterization. Environ Sci Pollut Res Int 2023; 30:65779-65800. [PMID: 37093381 DOI: 10.1007/s11356-023-26970-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Accepted: 04/08/2023] [Indexed: 05/03/2023]
Abstract
Due to high metal toxicity, mixed municipal solid waste (MSW) compost is difficult to use. This study detected the presence of heavy metals (Cd, Cu, Pb, Ni, and Zn) in MSW compost through mineralogical analysis using X-ray diffraction (XRD) and performed topographical imaging and elemental mapping using a scanning electron microscope and energy dispersive X-ray analysis (SEM-EDX). Ethylenediaminetetraacetic acid (EDTA), a typical chelator, is tested to remove heavy metals from Indian MSW compost (New Delhi and Mumbai). It deals with two novel aspects, viz., (i) investigating the influence of EDTA-washing conditions, molarity, dosage, MSW compost-sample size, speed, and contact time, on their metal removal efficiencies, and (ii) maximizing the percentage removal of heavy metals by determining the optimal process control process parameters. These parameters were optimized in a batch reactor utilizing Taguchi orthogonal (L25) array. The optimization showed that the removal efficiencies were 96.71%, 47.37%, and 49.94% for Cd, Pb, and Zn in Delhi samples, whereas 45.55%, 79.52%, 59.63%, 82.31%, and 88.40% for Cd, Cu, Pb, Ni, and Zn in Mumbai samples. Results indicate that the removal efficiency of heavy metals was greatly influenced by EDTA-molarity. Fourier-transform infrared spectroscopy (FTIR) confirmed the presence of hydroxyl group, which aids heavy metal chelation. The results reveal the possibility of EDTA to reduce the hazardous properties of MSW compost.
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Affiliation(s)
- Srishti Khare
- Department of Civil Engineering, Birla Institute of Technology and Science, Pilani, Rajasthan, India
| | - Anupam Singhal
- Department of Civil Engineering, Birla Institute of Technology and Science, Pilani, Rajasthan, India
| | - Saumitra Rai
- Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Srinivas Rallapalli
- Department of Civil Engineering, Birla Institute of Technology and Science, Pilani, Rajasthan, India.
- Department of Bioproducts and Biosystems Engineering, University of Minnesota, Twin Cities, MN, USA.
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Jan R, Asif S, Asaf S, Du XX, Park JR, Nari K, Bhatta D, Lee IJ, Kim KM. Melatonin alleviates arsenic (As) toxicity in rice plants via modulating antioxidant defense system and secondary metabolites and reducing oxidative stress. Environ Pollut 2023; 318:120868. [PMID: 36526054 DOI: 10.1016/j.envpol.2022.120868] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2022] [Revised: 11/29/2022] [Accepted: 12/12/2022] [Indexed: 06/17/2023]
Abstract
The Arsenic (As) load on the environment has increased immensely due to large-scale industrial and agricultural uses of As in several synthetic products, such as fertilizers, herbicides, and pesticides. Melatonin is a plant hormone that has a key role in abiotic stress inhibition, but the mechanism of resilience to As stress remains unexplored in rice plants. In this study, we determined how As affects rice plant and how melatonin facilitate As stress tolerance in rice. Here we investigated that, exogenous melatonin reduced As stress by inducing anthocyanin biosynthesis. Melatonin induced the expression of anthocyanin biosynthesis genes such as PAL, CHS, CHI, F3H, DFR, and ANS, which resulted in 1659% and 389% increases in cyanidin and delphinidin, respectively. Similarly, melatonin application significantly induced SA and ABA accumulation in response to As stress in rice plant. Application of melatonin also significantly reduced expression of PT-2 and PT-8 (transporter genes) and reduced uptake of As and its translocation to other compartments. Melatonin and As analysis revealed that melatonin application significantly reduced As contents in the melatonin-supplemented plants, suggesting that As uptake is largely dependent on either the melatonin basal level or anthocyanin in rice plants. In this study, we investigated new symptoms on leaves, which can severely damage leaves and impair photosynthesis. However, anthocyanin as a chelating agent, detoxifies As in vacuole and reduces oxidative stress induced by As.
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Affiliation(s)
- Rahmatullah Jan
- Department of Applied Biosciences, Graduate School, Kyungpook National University, Daegu, 41566, South Korea; Coastal Agriculture Research Institute, Kyungpook National University, Daegu, 41566, South Korea
| | - Saleem Asif
- Department of Applied Biosciences, Graduate School, Kyungpook National University, Daegu, 41566, South Korea
| | - Sajjad Asaf
- Natural and Medical Science Research Center, University of Nizwa, Nizwa, Oman
| | - Xiao-Xuan Du
- Biosafty Division, National Academy of Agriculture Science, Rural Development, Administration, Jeonju, 54874, South Korea
| | - Jae-Ryoung Park
- Crop Breeding Division, National Institute of Crop Science, Rural Development Administration, Wanju, 55365, South Korea
| | - Kim Nari
- Department of Applied Biosciences, Graduate School, Kyungpook National University, Daegu, 41566, South Korea
| | - Dibya Bhatta
- Department of Applied Biosciences, Kyungpook National University, Daegu, Republic of Korea
| | - In-Jung Lee
- Department of Applied Biosciences, Kyungpook National University, Daegu, Republic of Korea
| | - Kyung-Min Kim
- Department of Applied Biosciences, Graduate School, Kyungpook National University, Daegu, 41566, South Korea; Coastal Agriculture Research Institute, Kyungpook National University, Daegu, 41566, South Korea.
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Kumar K, Ettiyathara MT, Kalaiah MK, Ebenezer A, Bhat KG, Selvam M. Auditory Brainstem Response in Children with Thalassemia Major under Chelating Therapy. Int Tinnitus J 2022; 26:143-146. [PMID: 36724364 DOI: 10.5935/0946-5448.20220023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The present study compared the Auditory Brainstem Response (ABR) of children with thalassemia major and typically developing children. A total of 16 children participated in this study. Group I included 8 children with thalassemia major regularly undergoing blood transfusions and chelating therapy. Group II included 8 age and gender-matched typically developing children. All children in both groups had hearing sensitivity within normal limits. The Auditory Brainstem Response (ABR) was recorded monaurally for click stimuli from both ears. Results showed that the mean latencies of peaks of ABR were similar in both groups. The mean peak amplitude of peaks I and V of the ABR were different between groups, but it was not statistically significant. The present study showed no abnormality in the latency and amplitude of peaks of the ABR in children with thalassemia major with hearing sensitivity within normal limits.
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Affiliation(s)
- Kaushlendra Kumar
- Department of Audiology and Speech Language Pathology, Kasturba Medical College, Mangalore, Manipal Academy of Higher Education, Manipal, India
| | - Mathew Thomas Ettiyathara
- Department of Audiology and Speech Language Pathology, Kasturba Medical College, Mangalore, Manipal Academy of Higher Education, Manipal, India
| | - Mohan Kumar Kalaiah
- Department of Audiology and Speech Language Pathology, Kasturba Medical College, Mangalore, Manipal Academy of Higher Education, Manipal, India
| | - Anupriya Ebenezer
- Department of Audiology and Speech Language Pathology, Kasturba Medical College, Mangalore, Manipal Academy of Higher Education, Manipal, India
| | - Kamalakshi G Bhat
- Department of Pediatrics, Kasturba Medical College, Mangalore, Manipal Academy of Higher Education, Manipal, India
| | - Madhubala Selvam
- Department of Pediatrics, Kasturba Medical College, Mangalore, Manipal Academy of Higher Education, Manipal, India
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Abdelazim MH, Abdelazim AH, Moneir W. The effect of intra-nasal tetra sodium pyrophosphate on decreasing elevated nasal calcium and improving olfactory function post COVID-19: a randomized controlled trial. Allergy Asthma Clin Immunol 2022; 18:67. [PMID: 35927706 PMCID: PMC9354346 DOI: 10.1186/s13223-022-00711-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 07/26/2022] [Indexed: 11/18/2022]
Abstract
Background Olfactory dysfunction is recognized as a symptom of COVID-19. Reports revealed the nasal calcium increase has adverse effects on olfactory function. Tetra sodium pyrophosphate, a chelating agent, can bind calcium and help improve olfaction. Methods Sixty-four patients with olfactory dysfunction persisting for more than 90 days after COVID-19 were recruited. Participants were divided into 2 groups that received either 0.9% sodium chloride or 1% tetra sodium pyrophosphate for topical application. Olfactory function was tested with the Sniffin' Sticks test before treatment and 1 month later. In addition, nasal calcium was determined with an ion-selective electrode. Results After topical application of tetra sodium pyrophosphate compared to sodium chloride, improvement from anosmia to hyposmia with decrease in calcium level was demonstrated. As for the results of tetra-sodium pyrophosphate, 81% showed improved olfactory function and 19% did not exhibit olfaction improvement. Conclusions Intranasal application of tetra sodium pyrophosphate may be associated with improvement in olfactory function after COVID -19 infection. Trial registration Ethical Committee of Damietta Faculty of Medicine approved this study on January 2021 (approval number, IRB 00012367-21-03-010).
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Affiliation(s)
- Mohamed H Abdelazim
- Department of Otolaryngology, Faculty of Medicine, Al-Azhar University, Damietta, 34518, Egypt
| | - Ahmed H Abdelazim
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Al-Azhar University, Nasr CityCairo, 11751, Egypt.
| | - Waleed Moneir
- Department of Otorhinolaryngology, Faculty of Medicine, Mansoura University, Mansoura, 35511, Egypt
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Ghazaryan KA, Movsesyan HS, Minkina TM, Nevidomskaya DG, Rajput VD. Phytoremediation of copper-contaminated soil by Artemisia absinthium: comparative effect of chelating agents. Environ Geochem Health 2022; 44:1203-1215. [PMID: 34750677 DOI: 10.1007/s10653-021-01151-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 10/26/2021] [Indexed: 06/13/2023]
Abstract
Phytoremediation is a promising method for the removal of toxic trace elements, specifically of copper, from the contaminated soil in the mining regions of Armenia. Thereby, the objectives of our study were the assessment of copper accumulation capacity and phytoremediation suitability of wormwood (Artemisia absinthium L.), a potential metal hyperaccumulator, as well as the identification of the influence of some chelating agents and their combinations on copper phytoremediation effectiveness. The results of studies have shown that A. absinthium is a relatively well-adapted plant species with the ability to grow in copper-contaminated soils collected from the surroundings of Zangezur Copper and Molybdenum Combine (south-east of Armenia). The observed decrease in plant growth in contaminated soil was possible to restore by the use of ammonium nitrate. It was revealed that for the remediation of copper-contaminated soils by phytostabilisation method, A. absinthium could be grown without the application of chelating agents, as being a perennial herb, it is able to accumulate relatively high contents of copper in its root and do not transfer this metal to the above-ground part at the same time. As opposed to the phytostabilisation method, for the cleaning of copper-contaminated soils through phytoextraction method by A. absinthium, the application of chemical amendments is needed for the enhancement of copper bioavailability and for its intensive transportation to the above-ground part of the plant. Collating the effects of various chemical agents on the plant, we concluded that the growth scheme, when the application of NH4NO3, a promoter of plant growth, is combined with the joint use of citric and malic acids, can be applied as the most expedient approach for remediation of copper-contaminated soils by phytoextraction method.
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Guan H, Dong L, Zhang Y, Bai S, Yan L. GLDA and EDTA assisted phytoremediation potential of Sedum hybridum 'Immergrunchen' for Cd and Pb contaminated soil. Int J Phytoremediation 2022; 24:1395-1404. [PMID: 35166632 DOI: 10.1080/15226514.2022.2031865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Exogenous application of chelants is a common way to enhance the phytoextraction of heavy metals. A pot experiment was conducted to investigate the influences of cadmium (Cd), lead (Pb), Cd and Pb, L-glutamic acid N, N-diacetic acid (GLDA) and ethylene diamine tetraacetate (EDTA) on the growth, Cd and Pb accumulation of Sedum hybridum 'Immergrunchen'. The results showed that Sedum hybridum 'Immergrunchen' had a high tolerance to Pb treatment, followed by Cd-Pb treatment. The plant was sensitive to Cd stress. EDTA treatment was more harmful to plant growth than that of GLDA treatment. The optimal Cd concentration of shoot and root reached 27.6 mg·kg-1 and 32.6 mg·kg-1, 757 mg·kg-1 and 1,025 mg·kg-1for Pb accumulation at 100-1,500 mg·kg-1. The maximum Cd and Pb phytoextraction from 3 mmol·kg-1 GLDA treatment were 1.40 and 1.73 times as much as that of the control, 1.21 and 1.02 times under 6 mmol·kg-1 EDTA treatment. Therefore, the enhanced phytoremediation of GLDA to Cd and Pb co-contaminated soil was better than that of EDTA. GLDA-assisted phytoextraction of Cd and Pb by Sedum hybridum 'Immergrunchen' can be considered as a promising way to phytoremediate Cd and Pb co-contaminated soil.
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Affiliation(s)
- Haiyan Guan
- Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, National Engineering Research Center for Floriculture, Beijing Laboratory of Urban and Rural Ecological Environment and College of Landscape Architecture, Beijing Forestry University, Beijing, China
- Chinese Academy of Forestry, Beijing, China
| | - Li Dong
- Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, National Engineering Research Center for Floriculture, Beijing Laboratory of Urban and Rural Ecological Environment and College of Landscape Architecture, Beijing Forestry University, Beijing, China
- Chinese Academy of Forestry, Beijing, China
| | - Yan Zhang
- Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, National Engineering Research Center for Floriculture, Beijing Laboratory of Urban and Rural Ecological Environment and College of Landscape Architecture, Beijing Forestry University, Beijing, China
- Chinese Academy of Forestry, Beijing, China
| | - Shubing Bai
- Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, National Engineering Research Center for Floriculture, Beijing Laboratory of Urban and Rural Ecological Environment and College of Landscape Architecture, Beijing Forestry University, Beijing, China
- Chinese Academy of Forestry, Beijing, China
| | - Li Yan
- Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, National Engineering Research Center for Floriculture, Beijing Laboratory of Urban and Rural Ecological Environment and College of Landscape Architecture, Beijing Forestry University, Beijing, China
- Chinese Academy of Forestry, Beijing, China
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12
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Ma C, Li J, Xia W, Ding Y, Zhang L, Xu Y. Effect of additives on the remediation of arsenic and chromium co-contaminated soil by an electrokinetic-permeable reactive barrier. Environ Sci Pollut Res Int 2022; 29:11966-11975. [PMID: 34558049 DOI: 10.1007/s11356-021-16357-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Accepted: 09/01/2021] [Indexed: 06/13/2023]
Abstract
To enhance the remediation efficiency of arsenic (As) and chromium (Cr)co-contaminated soil, the effect of various combinations of reducing and chelating agents on the removal of As and Cr was studied in the present work by using electrokinetic technology coupled with a permeable reactive barrier (EK-PRB). In an experiment with EK-PRB, reducing agents (ascorbic acid and citric acid) and chelating agents (EDTA-2Na) were applied together with CaAl-layered double hydroxide (CaAl-LDH) to pretreat As and Cr co-contaminated soil. The chelating agents increased the removal efficiency of As and Cr, while the reducing agent only improved As removal in co-contaminated soil. The best removal efficiencies of As and Cr were 41.2% and 46.8%, respectively. The reducing agents promoted the production of As(III) and enhanced the migration of As. However, a large amount of Cr(VI) was reduced to Cr(III), which affected the migration of Cr. Although the addition of chelating agents partly increased the migration of Cr(III), the removal of total chromium (TCr) still decreased. In this remediation system, a PRB can effectively capture and fix As and Cr. The results indicated that As was mainly adsorbed on the surface of CaAl-LDH, while the surface adsorption and intercalation of CaAl-LDH were the main mechanisms for Cr.
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Affiliation(s)
- Chunzi Ma
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, People's Republic of China
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, People's Republic of China
| | - Jiangpeng Li
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, People's Republic of China
| | - Wei Xia
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, People's Republic of China
| | - Ying Ding
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, People's Republic of China
| | - Liting Zhang
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, People's Republic of China
| | - Yunfeng Xu
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, People's Republic of China.
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Fiorentino A, Lofrano G, Cucciniello R, Carotenuto M, Motta O, Proto A, Rizzo L. Disinfection of roof harvested rainwater inoculated with E. coli and Enterococcus and post-treatment bacterial regrowth: Conventional vs solar driven advanced oxidation processes. Sci Total Environ 2021; 801:149763. [PMID: 34438135 DOI: 10.1016/j.scitotenv.2021.149763] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Revised: 08/15/2021] [Accepted: 08/15/2021] [Indexed: 06/13/2023]
Abstract
Solar driven advanced oxidation processes (AOPs) (an alternative solar photo Fenton like process (SPF), sunlight/H2O2 (SHP) and sunlight/chlorine (SCL)) and respective dark conditions, were compared for the first time to conventional (chlorination and UV-C radiation) disinfection processes, in the inactivation of E. coli and Entero strains inoculated in real roof-harvested rainwater (RHRW), to evaluate their possible safe use for crop irrigation. In this regard, bacterial regrowth was also evaluated 6, 12, 24 and 48 h after disinfection treatment. The SPF, using iminodisuccinic acid (IDS)-Cu complex as catalyst, was optimized (H2O2/IDS-Cu 55/1 best molar ratio) under mild conditions (spontaneous pH) and sunlight. The faster inactivation kinetics were observed for the SCL process (k = 1.473 min-1, t1/2 = 0.47 min for E. coli and k = 1.193 min-1, t1/2 = 0.57 min for Entero), while the most effective processes in controlling bacterial regrowth were SPF and SCL. Although UV-C radiation (0-1.3 × 104 μW s cm-2 dose range) was the second faster disinfection process (k = 1.242 min-1, t1/2 = 0.55 min for E. coli and k = 1.150 min-1, t1/2 = 0.60 min for Entero), it was the less effective process in controlling bacterial regrowth (>10 CFU 100 mL-1 already after 6 h post-treatment incubation). According to the bacterial inactivation and regrowth tests carried out in this work, SPF and SCL are interesting options for RHRW disinfection, in case of effluent use for crop irrigation.
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Affiliation(s)
- A Fiorentino
- Department of Chemistry and Biology "A. Zambelli", University of Salerno, via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
| | - G Lofrano
- Centro Servizi Metereologici e Tecnologici Avanzati (CeSMA), University of Naples Federico II, Via Cinthia 21, 80126 Naples, Italy.
| | - R Cucciniello
- Department of Chemistry and Biology "A. Zambelli", University of Salerno, via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
| | - M Carotenuto
- Department of Chemistry and Biology "A. Zambelli", University of Salerno, via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
| | - O Motta
- Department of Medicine Surgery and Dentistry, University of Salerno, via S. Allende, 84081 Baronissi, SA, Italy
| | - A Proto
- Department of Chemistry and Biology "A. Zambelli", University of Salerno, via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
| | - L Rizzo
- Department of Civil Engineering, University of Salerno, via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
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Kuo SY, Chen PC, Huang KT, Huang CJ. Bio-inspired zwitterionic polymeric chelating assembly for treatment of copper-induced cytotoxicity and hemolysis. Mater Sci Eng C Mater Biol Appl 2021; 129:112367. [PMID: 34579886 DOI: 10.1016/j.msec.2021.112367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 08/04/2021] [Accepted: 08/09/2021] [Indexed: 11/18/2022]
Abstract
We developed a hemocompatible, bio-inspired, multivalent, polymeric-chelating assembly based on the poly(2-methacryloyloxyethyl phosphorylcholine)-b-poly(serinyl acrylate) (PMPC-b-PserA) zwitterionic diblock copolymer. Functional PMPC-b-PserA was synthesized via reversible addition-fragmentation chain transfer (RAFT) polymerization to catch and encapsulate free copper ions (Cu2+) in a solution. PMPC with an identical polar group to phospholipids exhibits high hydrophilicity and fouling resistance against non-specific adsorption, and inertness to the metal ions. On the other hand, PserA with pendant groups of amino acids possesses a strong capability to react with Cu2+ by coordination interaction. Therefore, when PMPC-b-PserA was brought into contact with Cu2+, a hydrophobic core with multiple coordination "bridges" between polymers and Cu2+ was formed, leading to self-assembly of core-shell polymer-metal nanoparticles. As a result, free Cu2+ ions can be removed from the solution to prevent damage to cells and tissues. The synthesis and chemical structure of PMPC-b-PserA were characterized, and the formation of self-assembled polymer-Cu2+ nanoparticles and colloidal stability were analyzed. More importantly, the detoxification of PMPC-b-PserA in presence of Cu2+ with fibroblast cells was demonstrated by increased cell viability >80%. In addition, the hemolysis, which occurred due to disruption of RBC membranes by free Cu2+, was effectively suppressed by adding PMPC-b-PserA. The bio-inspired and biocompatible chelating agent of PMPC-b-PserA provides a new treatment approach to encapsulate and detoxify heavy metals in complex media for chelation therapy.
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Affiliation(s)
- Shing-Yu Kuo
- Department of Biomedical Sciences and Engineering, National Central University, Jhong-Li, Taoyuan 320, Taiwan
| | - Pin-Chun Chen
- Department of Biomedical Sciences and Engineering, National Central University, Jhong-Li, Taoyuan 320, Taiwan
| | - Kang-Ting Huang
- Department of Biomedical Sciences and Engineering, National Central University, Jhong-Li, Taoyuan 320, Taiwan; Department of Chemical & Materials Engineering, National Central University, Jhong-Li, Taoyuan 320, Taiwan
| | - Chun-Jen Huang
- Department of Chemical & Materials Engineering, National Central University, Jhong-Li, Taoyuan 320, Taiwan; R&D Center for Membrane Technology, Chung Yuan Christian University, 200 Chung Pei Rd., Chung-Li City 32023, Taiwan; NCU-DSM Research Center, National Central University, Jhong-Li, Taoyuan 320, Taiwan.
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15
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Huang R, Cui X, Luo X, Mao P, Zhuang P, Li Y, Li Y, Li Z. Effects of plant growth regulator and chelating agent on the phytoextraction of heavy metals by Pfaffia glomerata and on the soil microbial community. Environ Pollut 2021; 283:117159. [PMID: 33878683 DOI: 10.1016/j.envpol.2021.117159] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2020] [Revised: 03/12/2021] [Accepted: 04/12/2021] [Indexed: 06/12/2023]
Abstract
Pfaffia glomerata is a candidate for the remediation of heavy metal-contaminated soil, but phytoremediation efficiency requires enhancement. In this study, we evaluated how application of DA-6, EDTA, or CA affected the growth and heavy metal accumulation of P. glomerata and soil microorganisms. We found that P. glomerata removed more Cd and Zn than Pb or Cu from contaminated soil. When compared to the control, application of DA-6, CA, or CA + DA-6 increased plant biomass and increased stem Cd concentration by 1.28-, 1.20-, and 1.31-fold respectively; increased leaf Cd concentration by 1.25-, 1.28-, and 1.20-fold, respectively; and increased the total quantity of Cd extracted by 1.37-, 1.37-, and 1.38-fold, respectively. When compared to the control, application EDTA or EDTA + DA-6 significantly increased the soil available metal and Na concentrations, which harmed plant growth. Application of EDTA or EDTA + DA-6 also significantly decreased the Cd concentration in roots and stems. 16S rRNA high-throughput sequencing analysis revealed that application of EDTA or CA alone to soil significantly reduced the richness and diversity of soil bacteria, while foliar spraying of DA-6 combined with EDTA or CA slightly alleviated this reduction. EDTA or CA addition significantly changed the proportion of Actinobacteria and Proteobacteria. In addition, EDTA or CA addition caused changes in soil properties (e.g. heavy metal availability, K concentration, Na concentration, soil pH, soil CEC, and soil DOC concentration) that were associated with changes in the bacterial community. EDTA addition mainly affected the soil bacterial community by changing soil DOC concentration, the soil available Pb and Na concentration, and CA addition mainly affected the soil bacterial community by changing the soil available Ca concentration.
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Affiliation(s)
- Rong Huang
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiaoying Cui
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xianzhen Luo
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China
| | - Peng Mao
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China
| | - Ping Zhuang
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, 511458, China
| | - Yongxing Li
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China
| | - Yingwen Li
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China
| | - Zhian Li
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, 511458, China.
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Guo B, Liu C, Lin Y, Li H, Li N, Liu J, Fu Q, Tong W, Yu H. Fruit extracts from Phyllanthus emblica accentuate cadmium tolerance and accumulation in Platycladus orientalis: A new natural chelate for phytoextraction. Environ Pollut 2021; 280:116996. [PMID: 33784563 DOI: 10.1016/j.envpol.2021.116996] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 03/17/2021] [Accepted: 03/18/2021] [Indexed: 06/12/2023]
Abstract
A key challenge for phytoextraction is the identification of high efficiency, growth-supporting, and low cost chelating agents. To date, no substance has satisfied all above criteria. This study investigated nine traditional Chinese herbs and found that Phyllanthus emblica fruit (FPE) extract could be utilised as an optimal chelate for the phytoextraction of cadmium (Cd)-contaminated soils. FPE application into soil at a ratio of 0.1% (w/w) significantly increased extractable Cd (by 43%) compared to the control. The success of FPE as a chelating agent was attributed to high quantities of polyphenol compounds (0.76%) and organic acids (9.6%), in particular, gallic acid (7.6%). Furthermore, antioxidative properties (1.4%) and free amino acids in FPE alleviated Cd-induced oxidant toxicity and enhanced plant biomass. FPE promoted 78% higher phytoextraction efficiency in Platycladus orientalis compared to traditional chelating agents (EDTA). Furthermore, 76% of FPE was degraded 90 days after the initial application, and there was no difference in extractable Cd between the treatment and control. FPE has been commercially produced at a lower market price than other biodegradable chelates. As a commercially available and cost-effective chelator, FPE could be utilised to treat Cd-contaminated soils without adverse environmental impacts.
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Affiliation(s)
- Bin Guo
- Institute of Environment, Resource, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - Chen Liu
- Institute of Environment, Resource, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - Yicheng Lin
- Institute of Environment, Resource, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - Hua Li
- Institute of Environment, Resource, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - Ningyu Li
- Institute of Environment, Resource, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - Junli Liu
- Institute of Environment, Resource, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - Qinglin Fu
- Institute of Environment, Resource, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China.
| | - Wenbin Tong
- Qujiang District Agricultural and Rural Burea, Quzhou, 324022, China
| | - Haiping Yu
- Shangyu District Agricultural Technology Extension Center, Shaoxing, 312000, China
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17
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Kim SJ, Han HH, Hahn SK. Hyaluronate/black phosphorus complexes as a copper chelating agent for Wilson disease treatment. Biomater Res 2021; 25:20. [PMID: 34134773 PMCID: PMC8207598 DOI: 10.1186/s40824-021-00221-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Accepted: 05/31/2021] [Indexed: 11/25/2022] Open
Abstract
Background Wilson disease (WD) is a genetic disorder of copper storage, resulting in pathological accumulation of copper in the body. Because symptoms are generally related to the liver, chelating agents capable of capturing excess copper ions after targeted delivery to the liver are highly required for the treatment of WD. Methods We developed hyaluronate-diaminohexane/black phosphorus (HA-DAH/BP) complexes for capturing copper ions accumulated in the liver for the treatment of WD. Results HA-DAH/BP complexes showed high hepatocyte-specific targeting efficiency, selective copper capturing capacity, excellent biocompatibility, and biodegradability. HA enhanced the stability of BP nanosheets and increased copper binding capacity. In vitro cellular uptake and competitive binding tests verified targeted delivery of HA-DAH/BP complexes to liver cells via HA receptor mediated endocytosis. The cell viability test confirmed the high biocompatibility of HA-DAH/BP complexes. Conclusion HA-DAH/BP complexes would be an efficient copper chelating agent to remove accumulated copper in the liver for the WD treatment.
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Affiliation(s)
- Seong-Jong Kim
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang, Gyeongbuk, 37673, South Korea
| | - Hye Hyeon Han
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang, Gyeongbuk, 37673, South Korea
| | - Sei Kwang Hahn
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang, Gyeongbuk, 37673, South Korea.
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18
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Aghelan N, Sobhanardakani S, Cheraghi M, Lorestani B, Merrikhpour H. Evaluation of some chelating agents on phytoremediation efficiency of Amaranthus caudatus L. and Tagetes patula L. in soils contaminated with lead. J Environ Health Sci Eng 2021; 19:503-514. [PMID: 34150254 PMCID: PMC8172735 DOI: 10.1007/s40201-021-00623-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Accepted: 01/26/2021] [Indexed: 05/26/2023]
Abstract
PURPOSE This study was designed to evaluate the possible effects of some chelating agents on phytoremediation efficiency and plant growth parameters of Amaranthus caudatus L. and Tagetes patula L. in soils contaminated with lead. METHOD The plant species were grown in pots and treated with lead nitrate and in combination with 2.5, 2.0 and 2.5 mmol/kg of EDTA, SA and CA, respectively. RESULTS The results showed that the highest accumulations of Pb (mg/kg) with 0.74 and 0.13 were found in the roots and stems of A. caudatus exposed to 400 mg/kg Pb containing EDTA and SA, respectively. Moreover, the highest accumulation of Pb in the roots and stems of T. patula with 0.87 and 1.5 mg/kg were observed in 400 mg/kg Pb- contaminated soil containing SA. CONCLUSIONS Although the results obtained showed that T. patula would have a better phytoextraction potential than A. caudatus, it should be noted that due to the Pb behavior in the soil and/or leaching of Pb from the soil columns during the irrigation period the low amounts of Pb absorption by the root and aerial parts of the plants compared to the added doses of Pb(NO3)2 solution to the soil samples, imply the studied plants haven't the adequate potential for phytoextraction of Pb from contaminated soils.
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Affiliation(s)
- Nastaran Aghelan
- Department of the Environment, College of Basic Sciences, Hamedan Branch, Islamic Azad University, Hamedan, Iran
| | - Soheil Sobhanardakani
- Department of the Environment, College of Basic Sciences, Hamedan Branch, Islamic Azad University, Hamedan, Iran
| | - Mehrdad Cheraghi
- Department of the Environment, College of Basic Sciences, Hamedan Branch, Islamic Azad University, Hamedan, Iran
| | - Bahareh Lorestani
- Department of the Environment, College of Basic Sciences, Hamedan Branch, Islamic Azad University, Hamedan, Iran
| | - Hajar Merrikhpour
- Department of Agriculture, Sayyed Jamaleddin Asadabadi University, Asadabad, Iran
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Chong HS, Chen Y, Kang CS, Sin I, Zhang S, Wang H. Pyridine-containing octadentate ligand NE3TA-PY for formation of neutral complex with 177Lu(III) and 90Y(III) for radiopharmaceutical applications: Synthesis, DFT calculation, radiolabeling, and in vitro complex stability. J Inorg Biochem 2021; 221:111436. [PMID: 33971521 DOI: 10.1016/j.jinorgbio.2021.111436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 03/20/2021] [Accepted: 03/20/2021] [Indexed: 11/17/2022]
Abstract
Targeted radionuclide therapy is a developing therapeutic modality for cancer and employs a cytotoxic radionuclide bound to a chelating agent and a bioactive molecule with high binding affinity for a specific biomarker in tumors. An optimal chelator is one of the critical components to control therapeutic efficacy and toxicity of targeted radionuclide therapy. We designed a new octadentate ligand NE3TA-PY (7-[2-[(carboxymethyl)(2-pyridylmethyl)amino]ethyl]-1,4,7-triazacyclononane-1,4-diacetic acid) for β-particle-emitting 177Lu and 90Y with targeted radionuclide therapy applications. The pyridine-containing polyaminocarboxylate ligand was proposed to form a neutral complex with Lu(III) and Y(III). The new chelator NE3TA-PY was synthesized and experimentally and theorectically studied for complexation with 177Lu(III) and 90Y(III). DFT-optimized structures of Y(III)-NE3TA-PY and Lu(III)-NE3TA-PY complexes were predicted. NE3TA-PY displayed excellent radiolabeling efficiency with both 177Lu and 90Y. The new chelator (NE3TA-PY) bound to 177Lu was more stable in human serum and better tolerated when challenged by EDTA than 90Y-labeled NE3TA-PY. Our findings suggest that the new chelator (NE3TA-PY) produced excellent Lu-177 radiolabeling and in vitro complex stability profiles.
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Affiliation(s)
- Hyun-Soon Chong
- Department of Chemistry, Lewis College of Science and Letters, Illinois Institute of Technology, Chicago, IL, United States of America.
| | - Yunwei Chen
- Department of Chemistry, Lewis College of Science and Letters, Illinois Institute of Technology, Chicago, IL, United States of America
| | - Chi Soo Kang
- Department of Chemistry, Lewis College of Science and Letters, Illinois Institute of Technology, Chicago, IL, United States of America
| | - Inseok Sin
- Department of Chemistry, Lewis College of Science and Letters, Illinois Institute of Technology, Chicago, IL, United States of America
| | - Shuyuan Zhang
- Department of Chemistry, Lewis College of Science and Letters, Illinois Institute of Technology, Chicago, IL, United States of America
| | - Haixing Wang
- Department of Chemistry, Lewis College of Science and Letters, Illinois Institute of Technology, Chicago, IL, United States of America
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Zhang M, Fan Z, Hu Z, Luo X. Enhanced anaerobic digestion with the addition of chelator-nickel complexes to improve nickel bioavailability. Sci Total Environ 2021; 759:143458. [PMID: 33246732 DOI: 10.1016/j.scitotenv.2020.143458] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2020] [Revised: 10/18/2020] [Accepted: 10/21/2020] [Indexed: 05/28/2023]
Abstract
Nickel (Ni) is one of the most essential trace elements in the anaerobic digestion system. In this study, green chelating agent Ethylenediamine-N, N'-disuccinic acid (EDDS), common chelating agents with low biodegradability nitrilotriacetic acid (NTA) and ethylenediaminetetraacetic acid (EDTA) were respectively used as ligands of Ni (II) to inspect the feasibility of enhancing methane production and reducing Ni dosage. In practice, continuous stirred-tank reactors (37 °C, 120 rpm) were operated with a mixture of pig manure and food waste as the substrate, and were supplied with extra Ni in the form of Ni (II) (0, 2.5, and 5.0 mg/L) or chelator‑nickel (EDDS-Ni, NTA-Ni and EDTA-Ni) complexes (2.5 mg/L). The results showed that compared with that of adding Ni (2.5 mg/L) individually, the methane production increased of 23.34%, 31.26% and 16.07% with the addition of EDDS-Ni, NTA-Ni and EDTA-Ni complexes (2.5 mg/L), respectively. Accompanying with that, the EDDS-Ni and NTA-Ni supplementations both significantly increased the F430 concentration of 28% and 36% on the day of peak methane production (day five). The BCR sequential extraction analysis indicated that the sum of Ni in water soluble and exchangeable fractions after digestion were increased of 43.28%, 39.41%, and 24.29%, respectively. Further, the acid-volatile sulfide (AVS) and the simultaneously extracted nickels (SEMNi) content in sediments confirmed that the chelator‑nickel improved Ni bioavailability due to dissolution of nickel ions from their sulfides. This study demonstrated that the addition of chelator-Ni complexes was a practicable method to enhance methane production and reduced Ni dosage.
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Affiliation(s)
- Mei Zhang
- Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, PR China
| | - Zijing Fan
- Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, PR China
| | - Zhongda Hu
- Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, PR China
| | - Xingzhang Luo
- Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, PR China.
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21
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Beiyuan J, Fang L, Chen H, Li M, Liu D, Wang Y. Nitrogen of EDDS enhanced removal of potentially toxic elements and attenuated their oxidative stress in a phytoextraction process. Environ Pollut 2021; 268:115719. [PMID: 33007598 DOI: 10.1016/j.envpol.2020.115719] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 08/31/2020] [Accepted: 09/20/2020] [Indexed: 06/11/2023]
Abstract
(S,S)-ethylenediaminedisuccinic acid (EDDS) has a strong capacity to mobilize potentially toxic elements (PTEs) in phytoextraction. It can release NH4+-N via biodegradation, which can enhance N supply to soil thereafter promote plant growth and plant resistance to PTEs. However, the advanced feature of released N in the EDDS-enhanced phytoextraction remains unclear. In the current study, the effects of N supply released from EDDS on ryegrass phytoextraction and plant resistance to PTEs were investigated in detail by a comparison with urea. Our results supported that the addition of both EDDS and urea increased N concentration in soil solution, yet EDDS needed more time to release available N for plant uptake and transported more N from root to shoot. Additionally, EDDS significantly increased the concentration of all targeted PTEs, i.e. Cu, Zn, Cd, and Pb, in the soil solution, which results in higher levels of their occurrence in plant biomass compared with urea. By contrast, the supply of N slightly enhanced the ryegrass uptake of micro-nutrients, i.e. Cu and Zn, yet it caused negligible effects on nonessential elements, i.e. Cd and Pb. The mobilized PTEs by EDDS lead to elevated oxidative stress because higher levels of malondialdehyde and O2•- were observed. The supply of N attenuated oxidative stress caused by O2•- and H2O2, which was associated with enhanced activities of superoxide dismutase and peroxidase. Our results advanced the understanding of the exogenous N supply and metal resistance mechanisms in the EDDS-enhanced phytoextraction. This study also highlighted that EDDS can serve as a N source to ease N-deficient problems in PTEs-contaminated soils.
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Affiliation(s)
- Jingzi Beiyuan
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling, 712100, China; School of Environment and Chemical Engineering, Foshan University, Foshan, 528000, China
| | - Linchuan Fang
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling, 712100, China; CAS Center for Excellence in Quaternary Science and Global Change, Xi'an, 710061, China.
| | - Hansong Chen
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling, 712100, China; College of Xingzhi, Zhejiang Normal University, Jinhua, 321000, China
| | - Mengdi Li
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling, 712100, China
| | - Dongdong Liu
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling, 712100, China
| | - Yunqiang Wang
- State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment CAS, Xi'an, 710061, China; Department of Earth and Environmental Sciences, Xi'an Jiaotong University, Xi'an, 710049, China
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22
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Bai Y, Wu D, Wang W, Chen P, Tan F, Wang X, Qiao X, Wong PK. Dramatically enhanced degradation of recalcitrant organic contaminants in MgO 2/Fe(III) Fenton-like system by organic chelating agents. Environ Res 2021; 192:110242. [PMID: 32987005 DOI: 10.1016/j.envres.2020.110242] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2020] [Revised: 09/13/2020] [Accepted: 09/16/2020] [Indexed: 06/11/2023]
Abstract
Herein, the application of organic acids as chelating agent, including citric acid (CA), tartaric acid (TA), oxalic acid (OA) and ethylenediaminetetraacetic acid (EDTA), to enhance the degradation performance of MgO2/Fe(III) system was investigated in the terms of chelating agent dosage, Fe(III) dosage, reaction temperature, initial solution pH and inorganic anion. When the molar ratio of MgO2/Fe(III)/chelating agent was 1 : 0.7 : 0.3, the degradation efficiencies of Rhodamine B (RhB) increased from 6.7% (without chelating agent) to 42.3%, 98.5%, 48.9% and 25.8% within 30 min for CA, TA, OA, and EDTA, respectively. The promotion effect was mainly attributed to the chelation between chelating agents and Fe(III), rather than the acidification of chelating agents. The pseudo-first-order kinetic model well fitted RhB degradation in MgO2/Fe(III)/TA system, and the kinetic rate constant reached up to 0.295 min-1. Hydroxyl radical was confirmed to be the dominant active species to degrade organics in the MgO2/Fe(III)/TA system. Notably, the degradation system could work in a broad pH (3-11) and temperature (5-35 °C) range. Moreover, the MgO2/Fe(III)/TA system can also effectively degrade methylene blue, tetracycline and bisphenol A. This work provided a new, efficient and environmentally-friendly Fenton-like system for stubborn contaminant treatment.
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Affiliation(s)
- Yun Bai
- State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan, 430074, Hubei, China
| | - Doudou Wu
- State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan, 430074, Hubei, China
| | - Wei Wang
- State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan, 430074, Hubei, China.
| | - Pei Chen
- State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan, 430074, Hubei, China
| | - Fatang Tan
- State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan, 430074, Hubei, China
| | - Xinyun Wang
- State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan, 430074, Hubei, China
| | - Xueliang Qiao
- State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan, 430074, Hubei, China
| | - Po Keung Wong
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China
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Van der Meeren A, Drouet G, Devilliers K, Laurent D, Moureau A, Feray A, Lamart S. Evidence for a differential translocation of actinides across human lung epithelial cell monolayer in vitro according to their physicochemical properties and the presence of a chelating agent. Toxicol In Vitro 2020; 70:105035. [PMID: 33132172 DOI: 10.1016/j.tiv.2020.105035] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 09/16/2020] [Accepted: 10/20/2020] [Indexed: 10/23/2022]
Abstract
The epithelial cell plays a key role in the transfer of radionuclides from lungs to blood following pulmonary exposure. The present study was designed to evaluate the transfer across human lung epithelial cells of various actinides (plutonium, americium and uranium), the influence of the physicochemical properties of plutonium compounds and of the chelating agent diethylene triamine pentaacetic acid (DTPA). To address this question, Calu-3 cells grown in a bicameral culture system were used. The integrity of the epithelial barrier was evaluated by measuring transepithelial electrical resistance (TEER) and the passage of a fluorescent marker, lucifer yellow. Activity measurement in basal compartment following periodic collection of culture medium was made from 2 h to seven days. To facilitate data handling and analysis, the statistical tool STATBIODIS was used. The results indicate differences in transfer for the different elements, and according to Pu physicochemical properties. Though to various extents, the chelating agent DTPA always increased the transfer of Pu and Am across the epithelial cells, without altering the integrity of the epithelial barrier. This in vitro cell culture model, by mimicking translocation of actinides from lungs to blood, can represent a valuable tool to further understand the underlying mechanisms and properties controlling this process.
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Affiliation(s)
- A Van der Meeren
- Laboratory of Radio Toxicology, CEA, Paris-Saclay University, 91297 Arpajon, France.
| | - G Drouet
- Laboratory of Radio Toxicology, CEA, Paris-Saclay University, 91297 Arpajon, France
| | - K Devilliers
- Laboratory of Radio Toxicology, CEA, Paris-Saclay University, 91297 Arpajon, France
| | - D Laurent
- Laboratory of Radio Toxicology, CEA, Paris-Saclay University, 91297 Arpajon, France
| | - A Moureau
- Laboratory of Radio Toxicology, CEA, Paris-Saclay University, 91297 Arpajon, France
| | - A Feray
- Paris-Saclay University, Inserm, Inflammation, Microbiome and Immunosurveillance, 92290 Châtenay-Malabry, France
| | - S Lamart
- Laboratory of Radio Toxicology, CEA, Paris-Saclay University, 91297 Arpajon, France
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Pulpea D, Rotariu T, Toader G, Pulpea GB, Neculae V, Teodorescu M. Decontamination of radioactive hazardous materials by using novel biodegradable strippable coatings and new generation complexing agents. Chemosphere 2020; 258:127227. [PMID: 32554003 DOI: 10.1016/j.chemosphere.2020.127227] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 05/22/2020] [Accepted: 05/25/2020] [Indexed: 06/11/2023]
Abstract
Eight different types of complexing agents were employed for the development of new biodegradable decontamination solutions that are able to form strippable coatings after they are dispersed and allowed to dry on a variety of surfaces contaminated with 60Co, 133Ba, 137Cs and 241Am radioactive isotopes. The new generation of eco-friendly chelators with superior biodegradability, utilized for the first time in such applications, can easily replace the non-biodegradable and carcinogenic complexing agents that are still in use today, due to their decontamination performances. Furthermore, besides the complexing action over the radionuclides, the solutions contain two types of clays, Bentonite (BT) and Saponite (SP), which have the capacity to adsorb specific ions, improving the decontamination efficiency of the solutions. Our research revealed that it is preferable to replace BT with SP, due to its better dispersibility, thermal stability, next to superior ability to gel and better thermal stability (Miles, 2011). The solutions showed a decontamination factor superior to 95% for 137Cs (on all surfaces), over 90% for 60Co and 133Ba, and more than 72% 241Am (on all surfaces), except for galvanized metal plates, where lower decontamination factors were obtained: over 70% for 133Ba, maximum 41.87% for 241Am and 43.19% for 60Co.
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Affiliation(s)
- Daniela Pulpea
- Military Technical Academy "Ferdinand I" - MTA, Bucharest, 050141, Romania
| | - Traian Rotariu
- Military Technical Academy "Ferdinand I" - MTA, Bucharest, 050141, Romania.
| | - Gabriela Toader
- Military Technical Academy "Ferdinand I" - MTA, Bucharest, 050141, Romania
| | | | - Valentina Neculae
- Institute for Nuclear Research Pitesti - ICN, Mioveni, 115400, Romania
| | - Mircea Teodorescu
- University Politehnica of Bucharest - UPB, Bucharest, 011061, Romania
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25
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McDougall DR, Kihara S, Reinhardt J, Miskelly GM, McGillivray DJ, Jeffs AG. Biodegradable chelating agent improves the survival of early larvae for shellfish aquaculture. Aquat Toxicol 2020; 228:105645. [PMID: 33010639 DOI: 10.1016/j.aquatox.2020.105645] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 08/28/2020] [Accepted: 09/20/2020] [Indexed: 06/11/2023]
Abstract
The toxicity of heavy metals commonly impacts the survival of crustacean and bivalve larvae in hatchery culture, and this has led to the widespread use of EDTA to decrease this toxicity. Since EDTA has a very poor biodegradability leading to potential persistent environmental effects, alternative methods to prevent heavy metal toxicity to shellfish larvae are needed. EDDS is a biodegradable potential alternative to EDTA for this application and was tested as a treatment of the seawater used for rearing aquaculture Greenshell™ mussel (Perna canaliculus) larval embryos in this study. Mussel embryos reared with EDTA or EDDS had significantly better survival than without. The concentrations and spatial distributions of heavy metals in D-veliger larvae as determined by Inductively Coupled Plasma Mass Spectrometry (ICP-MS) and X-ray Fluorescence Microscopy (XFM) suggested that chelating agents increased the levels of calcium in larvae while they reduced the concentration of zinc. In addition, where decreased accumulation of the other heavy metals was not observed, chelating agents affected their distribution within the larvae, especially for copper and arsenic. This is the first study to test the use of EDDS for aquaculture hatchery application and shows that EDDS is an effective biodegradable alternative to EDTA that can mitigate the effects of heavy metals for shellfish larval rearing.
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Affiliation(s)
- Daniel R McDougall
- Institute of Marine Science, University of Auckland, Private Bag 92019, Auckland, New Zealand.
| | - Shinji Kihara
- School of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland, New Zealand
| | - Juliane Reinhardt
- Australian Synchrotron, Australian Nuclear Science and Technology Organisation, Clayton, Victoria 3168, Australia
| | - Gordon M Miskelly
- School of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland, New Zealand
| | - Duncan J McGillivray
- School of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland, New Zealand
| | - Andrew G Jeffs
- Institute of Marine Science, University of Auckland, Private Bag 92019, Auckland, New Zealand
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26
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Mazarji M, Minkina T, Sushkova S, Antonenko E, Mandzhieva S, Dudnikova T. Impact of humic acid on degradation of benzo(a)pyrene polluted Haplic Chernozem triggered by modified Fenton-like process. Environ Res 2020; 190:109948. [PMID: 32750554 DOI: 10.1016/j.envres.2020.109948] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Revised: 07/10/2020] [Accepted: 07/12/2020] [Indexed: 06/11/2023]
Abstract
In this study, the applicability of a modified Fenton reaction for remediation of polycyclic aromatic hydrocarbons (PAHs) was demonstrated in chernozem soil. The main aim was to investigate the impact of variation of humic acid (HA) on the modified Fenton capabilities to degrade of benzo(a)pyrene (BaP). Experimental was designed with two independent variables, including hydrogen peroxide (H2O2) and hematite (α-Fe2O3), to determine the most effective BaP treatment conditions with exploring natural and an extra added amount of HA. For modified Fenton reaction at Haplic Chernozem, the best BaP degradation conditions resulted in an overall degradation of 68% with the following conditions: 0.95 M H2O2; 17.54 mg/g hematite; pH 7.8 without adjustment; 24 h; unsaturated (soil: water ratio 1:0.5). In the soil supplemented with 1% HA, Fenton-like reaction was found to perform better and resulted in 76% BaP degradation with less amount of hematite dosage (16.71 mg). The fact that HA, a significant class of naturally occurring compounds in soil, supports the Fenton reaction has strong relevance in the field of enhancing PAHs degradation field to obtain a more economical route.
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Affiliation(s)
- Mahmoud Mazarji
- Southern Federal University, Rostov-on-Don, Russian Federation.
| | - Tatiana Minkina
- Southern Federal University, Rostov-on-Don, Russian Federation.
| | | | - Elena Antonenko
- Southern Federal University, Rostov-on-Don, Russian Federation
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27
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Schwabe R, Senges CHR, Bandow JE, Heine T, Lehmann H, Wiche O, Schlömann M, Levicán G, Tischler D. Data on metal-chelating, -immobilisation and biosorption properties by Gordonia rubripertincta CWB2 in dependency on rare earth adaptation. Data Brief 2020; 31:105739. [PMID: 32490092 PMCID: PMC7262544 DOI: 10.1016/j.dib.2020.105739] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Accepted: 05/15/2020] [Indexed: 12/04/2022] Open
Abstract
Recent studies have shown that the metal adaptation of Actinobacteria offers a rich source of metal inducible environmentally relevant bio-compounds and molecules. These interact through biosorption towards the unique cell walls or via metal chelating activity of metallophors with trace elements, heavy metals and even with lanthanides to overcome limitations and toxic concentrations. Herein, the purpose is to investigate the adaptation potential of Gordonia rubripertincta CWB2 in dependence of the rare earths and to determine if we can utilize promising metallophore metal affinities for metal separation from aquatic solutions. For details on data interpretation and applicability of siderophores we refer to the related article entitled "Cultivation dependent formation of siderophores by Gordonia rubripertincta CWB2" [1]. The respective workflow comprises a metal adaptation method to demonstrate effects on bacterial growth, pH, metallophore production, and metabolic change. All this was evaluated by LC-MS/MS and effects on biosorption of rare earths was verified by ICP-MS. Furthermore, we were able to carry out batch metal adsorption and desorption studies of metallophores entrapped in inorganic polymers of tetramethoxysilane (TMOS) to determine metal chelating capacities and selective enrichment effects from model solutions. The adaptation potential of strain CWB2 at increased erbium and manganese concentrations was verified by increased chelating activity on agar plates, in liquid assays and demonstrated by the successful enrichment of erbium by metallophore-functionalized TMOS-polymers from an aquatic model solution. Furthermore, the number of detected compounds in dependency of rare earths differ in spectral counts and diversity compared to the wild type. Finally, the biosorption of rare earths for the selected adaptation was increased significantly up to 2-fold compared to the wild-type. Overall a holistic approach to metal stress was utilised, integrating a bacterial erbium adaptation, metal chelating, biosorption of lanthanides and immobilization as well as enrichment of metals using metallophore functionalized inorganic TMOS polymers for separation of metals from aquatic model solutions.
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Affiliation(s)
- Ringo Schwabe
- Institute of Biosciences, Environmental Microbiology Group, TU Bergakademie Freiberg, Leipziger Straße 29, 09599 Freiberg, Germany
- Institute of Biosciences, Biology and Ecology Group, TU Bergakademie Freiberg, Leipziger Straße 29, 09599 Freiberg, Germany
| | - Christoph Helmut Rudi Senges
- Applied Microbiology, Faculty of Biology and Biotechnology, Ruhr University Bochum, Universitätsstraße 150, 44801 Bochum, Germany
| | - Julia Elisabeth Bandow
- Applied Microbiology, Faculty of Biology and Biotechnology, Ruhr University Bochum, Universitätsstraße 150, 44801 Bochum, Germany
| | - Thomas Heine
- Institute of Biosciences, Environmental Microbiology Group, TU Bergakademie Freiberg, Leipziger Straße 29, 09599 Freiberg, Germany
| | - Henry Lehmann
- Institute of Informatic, TU Bergakademie Freiberg, Bernhard-von-Cotta Straße 2, 09599 Freiberg, Germany
| | - Oliver Wiche
- Institute of Biosciences, Biology and Ecology Group, TU Bergakademie Freiberg, Leipziger Straße 29, 09599 Freiberg, Germany
| | - Michael Schlömann
- Institute of Biosciences, Environmental Microbiology Group, TU Bergakademie Freiberg, Leipziger Straße 29, 09599 Freiberg, Germany
| | - Gloria Levicán
- Laboratorio de Microbiología Básica y Aplicada, Facultad de Química y Biología, Universidad de Santiago, Chile
| | - Dirk Tischler
- Institute of Biosciences, Environmental Microbiology Group, TU Bergakademie Freiberg, Leipziger Straße 29, 09599 Freiberg, Germany
- Microbial Biotechnology, Faculty of Biology and Biotechnology, Ruhr-Universität Bochum, Universitätsstraße 150, 44780 Bochum, Germany
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28
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Li Z, Peng Y, Gao H. A novel strategy for accelerating the recovery of a Fe(II)-inhibited anammox reactor by intermittent addition of betaine: Performance, kinetics and statistical analysis. Chemosphere 2020; 251:126362. [PMID: 32151808 DOI: 10.1016/j.chemosphere.2020.126362] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 02/12/2020] [Accepted: 02/26/2020] [Indexed: 06/10/2023]
Abstract
In this manuscript, Fe(II) inhibition of anammox and its recovery were investigated, and the performance, kinetics and statistical features were comprehensively studied simultaneously. Anammox was suppressed and completely inhibited by the addition of 109.29 and 378.57 mg/L Fe(II), respectively, via uncompetitive inhibition. Nitrite inhibition of anammox was best fitted by the Edwards model and Aiba model. EDTA-2Na wash (0.5, 1.0, 1.5, and 2.0 mM) had a limited effect on anammox recovery, while the addition of 2.0 mM betaine accelerated anammox recovery. Prolonged betaine addition caused an unintended reduction of anammox activity, though it self-recovered after the withdrawal of betaine. The modified Boltzmann model most accurately simulated the processes of anammox recovery using the EDTA-2Na wash, betaine regulation and self-recovery, and the modified Stover-Kincannon model was able to assess the results of anammox recovery. The one-sample t-test was successfully applied to determine the effects of these three recovery strategies on inhibited anammox, which were short-term disinhibition or long-term recovery effects. The above-mentioned results demonstrate that an intermittent addition of betaine, which is a better alternative to frequently-used but poorly-degradable EDTA, may be a useful and environmentally friendly recovery strategy for Fe(II)-inhibited anammox reactor.
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Affiliation(s)
- Zhixing Li
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing, 100124, China
| | - Yongzhen Peng
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing, 100124, China.
| | - Haijing Gao
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing, 100124, China
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29
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Gokturk H, Ozkocak I, Aydin U, Serefli ED. Effect of different chelating agents and their surface tension on the amount of apically extruded debris. J Dent Sci 2020; 16:195-200. [PMID: 33384797 PMCID: PMC7770288 DOI: 10.1016/j.jds.2020.06.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 06/14/2020] [Indexed: 12/01/2022] Open
Abstract
Background/purpose During root canal preparation apical extrusion is an undesirable situation that can cause postoperative complications. The aim of the present study is to evaluate the effect of the presence of different chelators in root canals during preparation on the amount of apically extruded debris and to investigate the effect of surface tension of irrigant on the apical extrusion. Materials and methods Ninety extracted mandibular incisor teeth were included. Prior to canal preparation, the teeth were mounted to Eppendorf tubes. Root canals of the samples were prepared with Reciproc instruments in the presence of different chelating agents (17% EDTA-liquid, 17% EDTA-gel, 7% maleic acid, 2.25% peracetic acid, 10% citric acid) and 5% NaOCl. Apically extruded debris was collected in Eppendorf tubes and weighted with an electronic balance. The surface tension of solutions was calculated with the ring method using a du Noüy ring digital tensiometer. The statistical analysis was performed with Tamhane's T2 test for apical extrusion and the Tukey for surface tension. The correlation between apical extrusion and surface tension was compared using Pearson's coefficient. Results The least amount of apically extruded debris was with EDTA-gel, peracetic acid and citric acid which were similar to each other. NaOCl had the highest surface tension whereas peracetic acid and EDTA-liquid had the lowest. There was no significant correlation exists between apical extrusion and surface tension. Conclusion The presence of EDTA-gel, citric acid and peracetic acid in root canals during preparation decreased the amount of apically extruded debris compared to other solutions. The investigated irrigation solutions have no significant effect on the amount of apical debris extrusion.
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Affiliation(s)
- Hakan Gokturk
- Department of Endodontics, Bolu Abant İzzet Baysal University, Bolu, Turkey
| | - Ismail Ozkocak
- Department of Endodontics, Bolu Abant İzzet Baysal University, Bolu, Turkey
| | - Ugur Aydin
- Department of Endodontics, Gaziantep University, Gaziantep, Turkey
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30
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Wang Y, Zhang H, Wu X, Xue C, Hu Y, Khan A, Liu F, Cai L. Ecotoxicity assessment of sodium dimethyldithiocarbamate and its micro-sized metal chelates in Caenorhabditis elegans. Sci Total Environ 2020; 720:137666. [PMID: 32325596 DOI: 10.1016/j.scitotenv.2020.137666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Revised: 02/28/2020] [Accepted: 02/29/2020] [Indexed: 06/11/2023]
Abstract
Sodium dimethyldithiocarbamate (SDDC) is a widely used heavy metal chelating agent in harmless treatment of wastewater and hazardous waste, but SDDC and its heavy metal chelates may leak into the environment and bring potential ecological risks. In this study, the model organism Caenorhabditis elegans was used to evaluate the toxic effect of SDDC and its heavy metal Cu, Pb chelates. Multiple endpoints were investigated by subacute exposure to SDDC (0.01-100 mg/L) and micro-sized Cu, Pb chelates of SDDC (1-100 mg/L). Our data indicated that the LC50 value of SDDC was 139.39 mg/L (95% Cl: 111.03, 174.75 mg/L). In addition, SDDC was found that concentration of 1 mg/L is a safe limit value for nematode C. elegans, and concentration above 1 mg/L caused adverse effects on the survival, growth, locomotion behaviors and reactive oxygen species (ROS) production of exposed nematodes. Furthermore, all tested SDDC-Cu and SDDC-Pb chelates had obviously lower toxic effect than untreated Cu, Pb metals. These two chelates also had a lower toxic effect than SDDC agent due to its more stable structure. Moreover, SDDC-Cu had a higher toxic effect than SDDC-Pb at the same concentration. Thus, our results suggest that SDDC as a kind of chelating agent applied in harmless treatment of heavy metals, the safe addition limit should not be exceeded.
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Affiliation(s)
- Yitian Wang
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Han Zhang
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Xiangyu Wu
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Cheng Xue
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Yang Hu
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Asim Khan
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Fuwen Liu
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Lankun Cai
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China.
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Kim MJ, Jung S. Calcium elution from cement kiln dust using chelating agents, and CO 2 storage and CaCO 3 production through carbonation. Environ Sci Pollut Res Int 2020; 27:20490-20499. [PMID: 32246418 DOI: 10.1007/s11356-020-08403-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Accepted: 03/12/2020] [Indexed: 06/11/2023]
Abstract
In this study, indirect carbonation was carried out by using cement kiln dust (CKD), an alkaline industrial by-product, and three chelating agents (citrate, malonate, and adipate salts) as solvents at the room temperature and atmospheric pressure. We derived the optimum conditions for eluting Ca from CKD, as well as those for storing CO2 and producing CaCO3 through carbonation. The most important factor affecting the Ca elution from CKD was the solvent concentration and that for the carbonation was the end-of-carbonation pH. Under the optimum conditions of Ca elution, the molar ratios of Ca and solvent in eluates were 1:1, 1:2, and 1:2, respectively, using citrate, malonate, and adipate solvents. Based on the results, we propose that one molecule of Ca ion and one molecule citrate that is tridentate are combined to form a complex. The bidentate malonate and adipate, on the other hand, form complexes by combining one molecule of Ca ion and two molecules of each solvent. It is essential to raise the pH while simultaneously minimizing the amount of free chelating agent in solution to produce more CaCO3 and prevent its dissolution. Besides, it is absolutely necessary to terminate the carbonation reaction at a pH of about 10.5 to improve the reuse efficiency of the chelating agent. CaCO3 produced through carbonation reaction started to dissolve at pH approximately 10.5. All of the CaCO3 produced was calcite with a purity of 98%. The efficiency of Ca elution from CKD using three solvents increased significantly with increasing stability constant of a Ca-ligand complex, but the efficiency of carbonation was the same for all solvents.
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Affiliation(s)
- Myoung-Jin Kim
- Department of Environmental Engineering, Korea Maritime and Ocean University, Busan, 49112, Korea.
| | - Sungsu Jung
- Department of Environmental Engineering, Korea Maritime and Ocean University, Busan, 49112, Korea
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32
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Kumar M, Flint SH, Palmer J, Plieger PG, Waterland M. The effect of phosphate on the heat resistance of spores of dairy isolates of Geobacillus stearothermophilus. Int J Food Microbiol 2019; 309:108334. [PMID: 31520893 DOI: 10.1016/j.ijfoodmicro.2019.108334] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 08/15/2019] [Accepted: 09/01/2019] [Indexed: 10/26/2022]
Abstract
In this study, we show that phosphate decreases the spore heat resistance by accelerating the rate of loss of cations from spores. Heat resistance of spores of Geobacillus stearothermophilus A1, D1, P3 and ATCC 12980 were determined in distilled water containing varying concentrations (0.1, 1 and 2% w/v) of di‑sodium phosphate. The average decimal reduction times (D value) for strains A1, D1, P3 and ATCC 12980 in distilled water were 5.8, 6.8, 5.7 and 9 min at 110 °C respectively. On the addition of 0.1, 1 and 2% w/v of di‑sodium phosphate, the average D110 values of all the strains in distilled water were lowered by 50, 61 and 70% respectively. Addition of 0.05% w/v of Na-EDTA to distilled water resulted in lowering of the average D110 value of all the strains by 55%. Heat resistance of spores of A1, D1, P3 and ATCC 12980 was found to be associated with the Dipicolinic Acid (DPA) content whose concentrations were 0.25, 0.30, 0.27 and 1.6 pg per spore respectively. Analysis by atomic absorption spectroscopy revealed that the phosphate present in the heating medium causes excess release of calcium from spores with 2% w/v phosphate being highly effective, thus confirming the chelating effect of phosphate. This study provides insight into the heat resistance and the increased heat sensitivity of spores of G. stearothermophilus A1, D1 and P3 in the presence of phosphate, which can be used in the design of Cleaning in Place (CIP) systems involving phosphate based cleaning agents to combat biofilms and spores in the dairy industry.
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Affiliation(s)
- M Kumar
- Massey Institute of Food Science and Technology, Massey University, Palmerston North 4442, New Zealand
| | - S H Flint
- Massey Institute of Food Science and Technology, Massey University, Palmerston North 4442, New Zealand.
| | - J Palmer
- Massey Institute of Food Science and Technology, Massey University, Palmerston North 4442, New Zealand
| | - P G Plieger
- School of Fundamental Sciences, Massey University, Palmerston North 4442, New Zealand
| | - M Waterland
- School of Fundamental Sciences, Massey University, Palmerston North 4442, New Zealand
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Mai X, Luo D, Wei L, Liu Y, Huang X, Wu Q, Yao G, Liu G, Liu L. Evaluation method for the measuring comprehensive suitability of chelating agents: a study of the temporal dynamics of heavy metal activation. Int J Phytoremediation 2019; 21:1415-1422. [PMID: 31272190 DOI: 10.1080/15226514.2019.1633262] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The effects of chelating agents on heavy metal activation in Cd- and Pb-contaminated soils were studied through a dynamic activation experiment. An evaluation method for the measuring comprehensive suitability of chelating agent was established by calculating indexes for the degree of activation effect suitability and activated heavy metals' half-life suitability. The following results were obtained: in Cd- and Pb-contaminated soils, heavy metal activation effects reached or approached maximum activating effects within 1 d and subsequently showed different levels of decline in all chelating agent treatment conditions. Declines in activation effects similarly subjected to the law of exponents over time and to the goodness of fit in DTPA, NTA, and GLDA ranged from 0.80 to 0.98. For Cd- and Pb-contaminated soils, chelating agents' levels of comprehensive suitability (H) were recorded as follows: NTA(1.40) > GLDA(1.31) > DTPA(1.14) > EDTA(1.00) > EDDS(0.14) > CA(0.06) and GLDA(1.56) > DTPA(1.48) > EDTA(1.00) > NTA(0.78) > EDDS(0.26) > CA (0.02). GLDA and DTPA are both suitable for Cd and Pb phytoextraction. Moreover, NTA and GLDA are optimal chelating agents for Cd and Pb phytoextraction, respectively.
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Affiliation(s)
- Xiaotao Mai
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, PR China
| | - Dinggui Luo
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, PR China
- Linköping University - Guangzhou University Research Center on Urban Sustainable Development, Guangzhou University, Guangzhou, PR China
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, Guangzhou University, Guangzhou, PR China
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou, PR China
| | - Lezhang Wei
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, PR China
- Linköping University - Guangzhou University Research Center on Urban Sustainable Development, Guangzhou University, Guangzhou, PR China
| | - Yu Liu
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, PR China
- Linköping University - Guangzhou University Research Center on Urban Sustainable Development, Guangzhou University, Guangzhou, PR China
| | - Xuexia Huang
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, PR China
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou, PR China
| | - Qihang Wu
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou, PR China
| | - Guangchao Yao
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, PR China
| | - Guowei Liu
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, PR China
| | - Lirong Liu
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, PR China
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Abstract
AIM This review illustrates heavy metals toxicity, currently available therapies and the role and efficacy of chelation therapy for its management. SUMMARY Heavy metals are necessary for various biological processes, but they become harmful in excess. Specifically, they induce oxidative stress by generating free radicals and reducing antioxidant levels. Heavy metals also alter the confirmation of protein and DNA and inhibit their function. Chelation therapy is commonly used to treat metals toxicity. Chelation is a chemical process that occurs when interaction between a central metal atom/ion and ligand leads to formation of a complex ring-like structure. The ligand has a donor ion/molecule, which has a lone pair of electrons and may be monodentate to polydentate. Each metal has a different reactivity with a ligand, so a specific chelation agent is required for each metal. Combination therapy with a chelating agent and an antioxidant led to improved outcome. CONCLUSION Heavy metal poisoning is a common health problem because of mining, smelting, industrial, agricultural and sewage waste. Heavy metals can be efficiently excreted from the body following treatment with proper chelation agents.
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Affiliation(s)
- Jong-Joo Kim
- Department of Biotechnology, Yeungnam University, Gyeongbuk, Republic of Korea
| | - You-Sam Kim
- Department of Biotechnology, Yeungnam University, Gyeongbuk, Republic of Korea
| | - Vijay Kumar
- Department of Biotechnology, Yeungnam University, Gyeongbuk, Republic of Korea.
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Mohseni M, Akbari S, Pajootan E, Mazaheri F. Amine-terminated dendritic polymers as a multifunctional chelating agent for heavy metal ion removals. Environ Sci Pollut Res Int 2019; 26:12689-12697. [PMID: 30877542 DOI: 10.1007/s11356-019-04765-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Accepted: 03/04/2019] [Indexed: 06/09/2023]
Abstract
In this study, amine-terminated hyperbranched PAMAM (polyamidoamine) polymer (AT-HBP) was synthesized as a multifunctional chelating agent to remove two heavy metal ions (Cr(III) and Cu(II)) from the simulated wastewater solutions. The AT-HBP was characterized by Fourier transformed infrared (FTIR), dynamic light scattering (DLS), and proton nuclear magnetic resonance (1H NMR) analysis. The removal process was carried out in two different methods, centrifuged process and ultrafiltration. The concentration of heavy metal ions before and after removal was measured by inductively coupled plasma (ICP) instrument. The removal processes were evaluated by changing different parameters such as solution pH, AT-HBP dosage, and metal ion concentration. To evaluate the extend of binding of heavy metal ions in the presence of AT-HBP the presence of salt in the solution was also examined on the performance of the removal system. The overall results indicated that removal percentages higher than 98% for Cr(III) and 86% for Cu(II) were achieved for heavy metal concentrations of 100 mg/L for both removal process methods. Furthermore, the function of second generation of polypropylenimine (PPI) was compared to AT-HBP. The results reveal that the removal of Cr(III) and Cu(II) ions by AT-HBP were approximately 20% and 10% higher compared to PPI, respectively. Finally, hyperbranched dendritic polymer with lower expenses to synthesize compared to dendrimer underlined favorable properties as a multifunctional chelating agent and enhancement of ultrafiltration process for wastewater treatment. Graphical abstract.
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Affiliation(s)
- Mahsa Mohseni
- Textile Engineering Department, Amirkabir University of Technology (Polytechnic Tehran), 424 Hafez Ave, Tehran, 15875-4413, Iran
| | - Somaye Akbari
- Textile Engineering Department, Amirkabir University of Technology (Polytechnic Tehran), 424 Hafez Ave, Tehran, 15875-4413, Iran.
| | - Elmira Pajootan
- Textile Engineering Department, Amirkabir University of Technology (Polytechnic Tehran), 424 Hafez Ave, Tehran, 15875-4413, Iran
- Department of Chemical Engineering, McGill University, Montreal, QC, H3A 0C5, Canada
| | - Firuzmehr Mazaheri
- Textile Engineering Department, Amirkabir University of Technology (Polytechnic Tehran), 424 Hafez Ave, Tehran, 15875-4413, Iran
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Van der Meeren A, Angulo JF, Bohand S, Griffiths NM. A quick and simple in vitro assay to predict bioavailability of actinides following accidental exposure. Toxicol In Vitro 2019; 58:142-149. [PMID: 30905861 DOI: 10.1016/j.tiv.2019.03.027] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 03/19/2019] [Accepted: 03/21/2019] [Indexed: 11/15/2022]
Abstract
Physicochemical properties of actinides highly influence internal intake and biodistribution. An a priori knowledge of the dissolution properties of compounds involved in accidental exposure would be of great help in early dose assessment. However, this information is rarely available, leading to difficulties in interpreting excretion data from contaminated victims. We developed an in vitro acellular assay to predict in vivo bioavailability of actinides and improve medical handling of the victims. Various actinides of different physicochemical properties were used to validate the reliability of the assay to mimic in vivo behavior of the contaminants. Our assay was designed as a dynamic muticompartmental system in which an agarose gel represents the retention compartment of actinides and a dynamic phase the transfer compartment. Relevant physiological conditions were obtained by introducing various components both in the static and dynamic phases. The proposed model may provide a good prediction of in vivo behavior and could be used as a first assessment to predict the fraction of actinides that could be potentially transferred from retention compartments, as well as the fraction available to chelating drugs.
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Affiliation(s)
- Anne Van der Meeren
- Laboratory of Radio Toxicology, CEA, Paris-Saclay University, 91297 Arpajon, France.
| | - Jaime F Angulo
- Laboratory of Radio Toxicology, CEA, Paris-Saclay University, 91297 Arpajon, France
| | - Sandra Bohand
- Direction of Health, Security, Environment & Radioprotection, Orano Mines, Paris, France
| | - Nina M Griffiths
- Laboratory of Radio Toxicology, CEA, Paris-Saclay University, 91297 Arpajon, France
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Wang Y, Meng D, Fei L, Dong Q, Wang Z. A novel phytoextraction strategy based on harvesting the dead leaves: Cadmium distribution and chelator regulations among leaves of tall fescue. Sci Total Environ 2019; 650:3041-3047. [PMID: 30373080 DOI: 10.1016/j.scitotenv.2018.10.072] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 10/02/2018] [Accepted: 10/06/2018] [Indexed: 06/08/2023]
Abstract
The treatment of large amount of hazardous plant residues from phytoextraction is costly and has been a burden for the society. This experiment was designed to evaluate the possibility of cadmium (Cd) phytoextraction by harvesting the dead leaves instead of the whole plant in tall fescue (Festuca arundinacea). Results showed that Cd was preferentially distributed in the senescent and dead leaves. EDTA, DTPA and EGTA enhanced Cd accumulations in the dead leaves which could be associated to the increase of the water-soluble inorganic Cd and Cd-organic acid complexes in shoots. The dead leaves were only 12.6-16.3% of the total shoot biomass but accumulated 73.4-87.2% of the total shoot Cd. The results indicate that a novel strategy of Cd phytoextraction based on harvesting the dead leaves is feasible to save the high treatment cost of hazardous plant residues while maintaining the acceptable phytoextraction efficiency.
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Affiliation(s)
- Yun Wang
- School of Agriculture and Biology, Shanghai Jiaotong University, Shanghai 200240, PR China; Department of Landscape Architecture, Shanghai Jiaotong University, Shanghai 200240, PR China
| | - Depeng Meng
- School of Agriculture and Biology, Shanghai Jiaotong University, Shanghai 200240, PR China
| | - Ling Fei
- School of Agriculture and Biology, Shanghai Jiaotong University, Shanghai 200240, PR China
| | - Qin Dong
- School of Agriculture and Biology, Shanghai Jiaotong University, Shanghai 200240, PR China
| | - Zhaolong Wang
- School of Agriculture and Biology, Shanghai Jiaotong University, Shanghai 200240, PR China.
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38
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Xu Y, Li J, Xia W, Sun Y, Qian G, Zhang J. Enhanced remediation of arsenic and chromium co-contaminated soil by eletrokinetic-permeable reactive barriers with different reagents. Environ Sci Pollut Res Int 2019; 26:3392-3403. [PMID: 30511220 DOI: 10.1007/s11356-018-3842-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Accepted: 11/23/2018] [Indexed: 06/09/2023]
Abstract
The present work focused on the effects of different reagents on the remediation of arsenic and chromium co-contaminated soil by electrokinetic technology coupled with permeable reactive barrier (EK-PRB). In a running of EK-PRB, reductant (ascorbic acid, sodium citrate) and chelating agent (EDTA-2Na) were used to pretreat contaminated soil together with CaAl-LDH as reactive materials for PRB. As a result, the chelating agent improved the removals of As and Cr in co-contaminated soil. However, the reducing agent only increased As removal. When 0.05 M sodium citrate was used in pretreatment, the As removal attained the maximum of 50.5%, although Cr removal was only 44.1% at the same time. When the contaminated soil was pretreated with 0.01 M EDTA-2Na, the Cr removal increased to 54.28%, although As removal was only 26.3%. After EK-PRB, the As and Cr were efficiently captured by CaAl-LDH, resulting in maximal fixed amounts of 126.5 mg/kg (As) and 1507.6 mg/kg (Cr). The XRD and FITR analyses of LDH indicated that As was mainly adsorbed on the surface of LDH. As for Cr, it was mainly intercalated into interlayer of LDH.
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Affiliation(s)
- Yunfeng Xu
- School of Environmental and Chemical Engineering, Shanghai University, No. 99 Shangda Rd., Shanghai, 200444, People's Republic of China
| | - Jiangpeng Li
- School of Environmental and Chemical Engineering, Shanghai University, No. 99 Shangda Rd., Shanghai, 200444, People's Republic of China
| | - Wei Xia
- School of Environmental and Chemical Engineering, Shanghai University, No. 99 Shangda Rd., Shanghai, 200444, People's Republic of China
| | - Ying Sun
- School of Environmental and Chemical Engineering, Shanghai University, No. 99 Shangda Rd., Shanghai, 200444, People's Republic of China
| | - Guangren Qian
- School of Environmental and Chemical Engineering, Shanghai University, No. 99 Shangda Rd., Shanghai, 200444, People's Republic of China
| | - Jia Zhang
- School of Environmental and Chemical Engineering, Shanghai University, No. 99 Shangda Rd., Shanghai, 200444, People's Republic of China.
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Nawaz H, Manhalter S, Ali A, Ashraf MY, Lang I. Ni tolerance and its distinguished amelioration by chelating agents is reflected in root radius of B. napus cultivars. Protoplasma 2019; 256:171-179. [PMID: 30046945 PMCID: PMC6349811 DOI: 10.1007/s00709-018-1287-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Accepted: 07/13/2018] [Indexed: 05/23/2023]
Abstract
The negative effect of excess nickel (Ni) on plants is well investigated but there is only little information on its influence on root anatomy and a possible amelioration by chelating agents. In this study, we utilized light microscopy to observe anatomical changes in canola (Brassica napus) roots and investigated the element content by X-ray microanalysis. Ni-tolerant (Con-II) and Ni-sensitive cultivars (Oscar) were selected for this purpose. The plants were treated with 30 ppm NiSO4. Then, citric acid and ethylene-diamine-tetra-acetic acid (EDTA) (alone or in combination) were applied to observe the influence of chelating agents in metal stress amelioration. Ni treatment led to significant swelling of the roots in the Con-II variety as compared to the cultivar Oscar. Application of EDTA reduced the root radius of Con-II plants and this effect for Ni tolerance is discussed. According to X-ray microanalyses, Ni ions were more dispersed in the sensitive cultivar as indicated by metal adsorption to the cell wall. We investigate the hypothesis that an enhanced capacity of binding metals to the cell wall allows the plants to tolerate more heavy metals.
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Affiliation(s)
- Humera Nawaz
- Cell Imaging and Ultrastructure Research, University of Vienna, Althanstrasse 14, 1090, Vienna, Austria
- Department of Botany, University of Sargodha, Sargodha, 40100, Pakistan
| | - Stephan Manhalter
- Cell Imaging and Ultrastructure Research, University of Vienna, Althanstrasse 14, 1090, Vienna, Austria
| | - Aamir Ali
- Department of Botany, University of Sargodha, Sargodha, 40100, Pakistan
| | - Muhammad Yasin Ashraf
- Nuclear Institute for Agriculture and Biology, P.O Box 28, Jhang Road, Faisalabad, Pakistan
| | - Ingeborg Lang
- Cell Imaging and Ultrastructure Research, University of Vienna, Althanstrasse 14, 1090, Vienna, Austria.
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Sampanpanish P, Nanthavong K. Effect of EDTA and NTA on Arsenic Bioaccumulation and Translocation Using Phytoremediation by Mimosa pudica L. from Contaminated Soils. Bull Environ Contam Toxicol 2019; 102:140-145. [PMID: 30478613 DOI: 10.1007/s00128-018-2502-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Accepted: 11/18/2018] [Indexed: 05/13/2023]
Abstract
This study aimed to investigate the effects of Nitrilotriacetic acid (NTA) and Elthylenediaminetetraacetic acid (EDTA) on the bioaccumulation and translocation of arsenic (As) by Mimosa pudica L. using soils with 5 mg/kg of added As and NTA and EDTA concentrations of 50, 100, and 200 mg/kg. Soil and plant samples were collected every 30-120 days to analyze the As concentrations in the soil, underground part of the plants (root), and aboveground parts of the plants (shoots and leaves). The results showed that the plants with EDTA concentrations of 100 mg/kg had the highest As accumulation. At 120 days, M. pudica L. had a higher accumulation in the underground parts (29.71 mg/kg) than in the aboveground parts (6.32 mg/kg), with statistical significance (p < 0.05). The As translocation factor in the aboveground parts was less than 1, indicating As accumulation in the underground part only. With EDTA concentrations of 50 and 100 mg/kg, M. pudica L. had the highest bioaccumulation potential of As of 8.00 and 8.44, respectively. However, this research did not examine the reaction between As and any growth promoters. Further research should investigate the details of such a reaction at the molecular level, as well as explore how fertilizer factors might affect the As absorption of M. pudica L.
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Affiliation(s)
- Pantawat Sampanpanish
- Environmental Research Institute, Chulalongkorn University (ERIC), Bangkok, 10330, Thailand.
- Research Program of Toxic Substance Management in the Mining Industry, Center of Excellence on Hazardous Substance Management (HSM), Bangkok, 10330, Thailand.
- Research Unit of Green Mining Management (GMM), Chulalongkorn University, Bangkok, 10330, Thailand.
| | - Khamla Nanthavong
- International Postgraduate Program in Environmental Management, Graduate School, Chulalongkorn University, Bangkok, 10330, Thailand
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Wang Q, Franz KJ. Modifying aroylhydrazone prochelators for hydrolytic stability and improved cytoprotection against oxidative stress. Bioorg Med Chem 2018; 26:5962-5972. [PMID: 30429096 DOI: 10.1016/j.bmc.2018.11.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 10/26/2018] [Accepted: 11/04/2018] [Indexed: 12/22/2022]
Abstract
BSIH ((E)-N'-(2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzylidene)isonicotinohydrazide) is a prodrug version of the metal chelator SIH ((E)-N'-(2-hydroxybenzylidene)isonicotinohydrazide) in which a boronate group prevents metal chelation until reaction with hydrogen peroxide releases SIH, which is then available for sequestering iron(III) and inhibiting iron-catalyzed oxidative damage. While BSIH has shown promise for conditionally targeting iron sequestration in cells under oxidative stress, the yield of SIH is limited by the fact that BSIH exists in cell culture media as an equilibrium mixture with its hydrolysis products isoniazid and 2-formylphenyl boronic acid. In the current study, several BSIH analogs were evaluated for their hydrolytic stability, reaction outcomes with H2O2, and prochelator-to-chelator conversion efficiency. Notably, the para-methoxy derivative (p-OMe)BSIH ((E)-N'-(5-methoxy-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzylidene)isonicotinohydrazide) and the meta-, para-double substituted (MD)BSIH ((E)-N'-((6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzo[d][1,3]dioxol-5-yl)methylene)isonicotinohydrazide) showed 1.3- and 1.9-fold improved hydrolytic stability compared to BSIH, respectively, leading to a 22 and 50% increase in chelator released. Moreover, both prochelators were found to protect retinal pigment epithelial cells stressed with either H2O2 or paraquat insult.
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Affiliation(s)
- Qin Wang
- Duke University, Department of Chemistry, 124 Science Dr., Durham, NC 27708, USA
| | - Katherine J Franz
- Duke University, Department of Chemistry, 124 Science Dr., Durham, NC 27708, USA.
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42
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Hosseini SS, Lakzian A, Halajnia A, Hammami H. The effect of olive husk extract compared to the edta on Pb availability and some chemical and biological properties in a Pb-contaminated soil. Int J Phytoremediation 2018; 20:643-649. [PMID: 29039991 DOI: 10.1080/15226514.2017.1365352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
It was found that using chelating agents increases the efficiency of heavy metal extraction, however, they may have negative effects on soil ecosystem quality. A pot experiment was conducted in a completely randomized design with three replications in order to evaluate the effect of EDTA and Olive Husk Extract (OHE) on some chemical and biological properties of the Pb-contaminated soil. The experimental treatments included EDTA (2 g Na2EDTA salt per kg soil), OHE (2 g TDS of OHE per kg soil) and control (without the chelating agent). The results revealed that the EDTA and OHE treatments increased the Pb availability by 17.7% and 5.5% in comparison to the control treatment, respectively. Although EDTA was more effective in increasing the Pb availability but decreased the soil biological quality index (SBQI). The EDTA treatment significantly decreased the dehydrogenase (DH) activity and germination index (GI). The OHE application significantly increased the available-P, available-K, total N and organic carbon content by 339.92%, 40.79%, 20.9%, and 29.7% compared with control treatment, respectively. Furthermore, OHE considerably increased SBQI from 18.96 to 53.48. Compared to the control treatment higher values of soil respiration activity, DH activity, and carbon availability index (CAI) were observed in OHE treatment.
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Affiliation(s)
- Seyed Sajjad Hosseini
- a Department of Soil Science , Faculty of Agriculture, Ferdowsi University of Mashhad , Mashhad , Iran
| | - Amir Lakzian
- a Department of Soil Science , Faculty of Agriculture, Ferdowsi University of Mashhad , Mashhad , Iran
| | - Akram Halajnia
- a Department of Soil Science , Faculty of Agriculture, Ferdowsi University of Mashhad , Mashhad , Iran
| | - Hossein Hammami
- b Department of Agronomy and Plant Breeding , College of Agriculture, University of Birjand , Birjand , Iran
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Islam SMM, Loman AA, Ju LK. High monomeric sugar yields from enzymatic hydrolysis of soybean meal and effects of mild heat pretreatments with chelators. Bioresour Technol 2018; 256:438-445. [PMID: 29477082 DOI: 10.1016/j.biortech.2018.02.054] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2017] [Revised: 02/10/2018] [Accepted: 02/12/2018] [Indexed: 06/08/2023]
Abstract
Defatted soybean meal has 30-35% oligo-/polymeric carbohydrates and approximately 50% proteins. Enzymatic carbohydrate monomerization enables easy separation to enrich protein content, reduces indigestibility concerns, and facilitates use of carbohydrate as fermentation feedstock. Among soybean carbohydrates, pectin and glucan are more recalcitrant to hydrolyze. To destabilize Ca2+-bridged junctures in pectin, effects of 3 chelators ethylenediaminetetraacetic acid (EDTA), sodium hexametaphosphate (HMP) and citric acid under 2-h 90 °C pretreatments were investigated here. Citric acid was the most effective while EDTA decreased enzymatic hydrolysis. In a 3-factor 2-level factorial study, heat (90 °C, 2 h) and citric acid (10 g/L) pretreatments and cellulase supplementation (10 FPU/g) were found to increase yields of all monosaccharides, to 86.8 ± 5.2% glucose, 98.1 ± 1.6% xylose, 87.5 ± 5.2% galactose, 83.6 ± 1.6% arabinose, and 91.4 ± 3.1% fructose + mannose. The largest percentage improvements were for arabinose (382%), mannose (113%) and glucose (51%). Achieving high monosaccharide yields greatly increases value of soybean carbohydrate as fermentation feedstock.
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Affiliation(s)
- S M Mahfuzul Islam
- Department of Chemical and Biomolecular Engineering, The University of Akron, Akron, OH 44325-3906, USA
| | - Abdullah A Loman
- Department of Chemical and Biomolecular Engineering, The University of Akron, Akron, OH 44325-3906, USA
| | - Lu-Kwang Ju
- Department of Chemical and Biomolecular Engineering, The University of Akron, Akron, OH 44325-3906, USA.
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Wang N, Chai H, Dong X, Zhou Q, Zhu L. Detection of Fe(III)EDTA by using photoluminescent carbon dot with the aid of F - ion. Food Chem 2018; 258:51-8. [PMID: 29655753 DOI: 10.1016/j.foodchem.2018.03.050] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Revised: 03/10/2018] [Accepted: 03/12/2018] [Indexed: 11/23/2022]
Abstract
Iron(III) ethylenediaminetetraacetate (Fe(III)EDTA) is widely used in iron fortification for reducing iron deficiency, and its determination is urgently needed. The present work developed a fluorescent method to straightforwardly determine Fe(III)EDTA by using photoluminescent carbon dots (C-dots) with the aid of F- ions as the masking agent of free Fe3+ ions. In the presence of F- ions, only Fe(III)EDTA selectively quenched the photoluminescence of C-dots, and both Fe3+ and Fe2+ as well as other carboxylic acids have no effect on the emission of C-dots. The sensing mechanism was attributed to the ligand-tailored electron transfer process from C-dots to Fe3+. Under optimum conditions, this method showed a linear calibration plot over the Fe(III)EDTA range of 1.0-200 μmol L-1 and a detection limit of 0.4 μmol L-1. The proposed method was successfully applied to determine Fe(III)EDTA in real samples with acceptable recoveries of spikes (95%-110%) and repeatability (RSD, 4.2%-9.5%).
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Mertens M, Höss S, Neumann G, Afzal J, Reichenbecher W. Glyphosate, a chelating agent-relevant for ecological risk assessment? Environ Sci Pollut Res Int 2018; 25:5298-5317. [PMID: 29294235 PMCID: PMC5823954 DOI: 10.1007/s11356-017-1080-1] [Citation(s) in RCA: 80] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Accepted: 12/18/2017] [Indexed: 05/30/2023]
Abstract
Glyphosate-based herbicides (GBHs), consisting of glyphosate and formulants, are the most frequently applied herbicides worldwide. The declared active ingredient glyphosate does not only inhibit the EPSPS but is also a chelating agent that binds macro- and micronutrients, essential for many plant processes and pathogen resistance. GBH treatment may thus impede uptake and availability of macro- and micronutrients in plants. The present study investigated whether this characteristic of glyphosate could contribute to adverse effects of GBH application in the environment and to human health. According to the results, it has not been fully elucidated whether the chelating activity of glyphosate contributes to the toxic effects on plants and potentially on plant-microorganism interactions, e.g., nitrogen fixation of leguminous plants. It is also still open whether the chelating property of glyphosate is involved in the toxic effects on organisms other than plants, described in many papers. By changing the availability of essential as well as toxic metals that are bound to soil particles, the herbicide might also impact soil life, although the occurrence of natural chelators with considerably higher chelating potentials makes an additional impact of glyphosate for most metals less likely. Further research should elucidate the role of glyphosate (and GBH) as a chelator, in particular, as this is a non-specific property potentially affecting many organisms and processes. In the process of reevaluation of glyphosate its chelating activity has hardly been discussed.
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Affiliation(s)
- Martha Mertens
- Institute for Biodiversity Network e.V. (ibn), Nußbergerstr. 6a, 93059, Regensburg, Germany.
| | - Sebastian Höss
- Institute for Biodiversity Network e.V. (ibn), Nußbergerstr. 6a, 93059, Regensburg, Germany
| | - Günter Neumann
- Institute of Crop Science (340h), University of Hohenheim, 70599, Stuttgart, Germany
| | - Joshua Afzal
- Institute of Crop Science (340h), University of Hohenheim, 70599, Stuttgart, Germany
| | - Wolfram Reichenbecher
- Federal Agency for Nature Conservation (BfN), Konstantinstr. 110, 53179, Bonn, Germany
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Zhang K, Zhou X, Zhang T, Yu L, Qian Z, Liao W, Li C. Degradation of the earthy and musty odorant 2,4,6-tricholoroanisole by persulfate activated with iron of different valences. Environ Sci Pollut Res Int 2018; 25:3435-3445. [PMID: 29152696 DOI: 10.1007/s11356-017-0452-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Accepted: 10/09/2017] [Indexed: 06/07/2023]
Abstract
2,4,6-Trichloroanisole (TCA) is an odorous compound that is often detected in tap water and is difficult to be removed via water treatment. In this study, the transformation efficiency of TCA in the presence of persulfate (PS) activated by iron (Fe2+, Fe0, and Fe3+) was investigated for the first time. The effects of the activator dosage, oxidant dosage, pH, dosing method, chelating agents, humic acid, and temperature were evaluated. The degradation rate of TCA increased with increasing PS dosages (0.12-0.48 mM) and initial Fe2+ concentrations (0.12-0.96 mM), while it decreased with higher Fe2+ concentrations. Fe2+/PS and Fe0/PS systems achieved their best TCA removal efficiency at pH 7 and 2.5, respectively. According to the results of electron paramagnetic resonance (EPR), the contribution of SO4-• to TCA degradation was much higher than that of •OH. Gradual addition of Fe2+ improved TCA degradation compared to single addition. Citric acid (CA) promoted TCA degradation under Fe2+/PS at the beginning of the reaction, but inhibited it after 10 min. Ethylenediaminetetraacetic acid (EDTA) improved the TCA removal rate with an EDTA/Fe2+ molar ratio of 0.5:1, while it decreased it at higher EDTA/Fe2+ molar ratios. Oxalic acid (OA) negatively affected TCA degradation with increasing OA/Fe2+ molar ratios. Among all of the chelating agents, only CA increased TCA degradation by Fe0/PS. Humic acid promoted TCA degradation by Fe2+/PS at the proper dosage (1 mg/L). Under our specific conditions and over the temperature ranging from 10 to 25 °C, no change was observed in the reaction kinetics. It was found that 2,4,6-trichlorophenol (TCP) was the only detected oxidation product. The presence of an Fe2+-Fe3+ redox cycle in iron-activated PS systems was confirmed by TCA degradation under the Fe3+/PS system.
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Affiliation(s)
- Kejia Zhang
- College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, Zhejiang, 310058, China
- Xiamen Urban Water Environmental Eco-Planning and Remediation Engineering Research Center, Xiamen, Fujian, 361021, China
| | - Xinyan Zhou
- College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, Zhejiang, 310058, China
| | - Tuqiao Zhang
- College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, Zhejiang, 310058, China
| | - Lang Yu
- College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, Zhejiang, 310058, China
| | - Zheming Qian
- College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, Zhejiang, 310058, China
| | - Wenchao Liao
- School of Environmental Science and Engineering, Xiamen University of Technology, Xiamen, Fujian, 361024, China
| | - Cong Li
- College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, Zhejiang, 310058, China.
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Bursztyn Fuentes AL, José C, de Los Ríos A, do Carmo LI, de Iorio AF, Rendina AE. Phytoextraction of heavy metals from a multiply contaminated dredged sediment by chicory (Cichorium intybus L.) and castor bean (Ricinus communis L.) enhanced with EDTA, NTA, and citric acid application. Int J Phytoremediation 2018; 20:1354-1361. [PMID: 30666892 DOI: 10.1080/15226514.2018.1524826] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Revised: 02/22/2018] [Accepted: 07/21/2018] [Indexed: 06/09/2023]
Abstract
The remediation of contaminated dredged sediments is necessary to eliminate the risk towards human beings or the environment when there is disposal on land. A greenhouse experiment was carried out to evaluate the chemically assisted phytoextraction to clean up dredged sediment contaminated with Cr, Cu, Pb, and Zn. The ability of castor bean and chicory to absorb, translocate, and accumulate metals from sediment to root and shoot was evaluated by applying EDTA (5 mM), NTA (5 mM), and citric acid (60 mM) to sediment, before the harvest. Citric acid 60 mM was the most effective treatment in increasing Cr, Cu, and Pb in castor bean and chicory shoot. Chicory could accumulate 1730 mg Cr kg-1 in shoot, and had greater values than one for the bioaccumulation and translocation factors when citric acid was added to the sediment. But, the Cr percentages removed per harvest of chicory were 0.05% and were lower for Cu, Pb, and Zn due to low biomass obtained. Citric acid-assisted phytoextraction with chicory can be a promising short time solution to reduce Cr concentration in sediment and reach the Cr level guide for industrial land use only if suitable agronomic practices could be implemented to increase crop yield.
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Affiliation(s)
- A L Bursztyn Fuentes
- a Department of Natural Resource and Environment, School of Agronomy , University of Buenos Aires , Buenos Aires City , Argentina
| | - C José
- a Department of Natural Resource and Environment, School of Agronomy , University of Buenos Aires , Buenos Aires City , Argentina
| | - A de Los Ríos
- a Department of Natural Resource and Environment, School of Agronomy , University of Buenos Aires , Buenos Aires City , Argentina
| | - L I do Carmo
- a Department of Natural Resource and Environment, School of Agronomy , University of Buenos Aires , Buenos Aires City , Argentina
| | - A F de Iorio
- a Department of Natural Resource and Environment, School of Agronomy , University of Buenos Aires , Buenos Aires City , Argentina
| | - A E Rendina
- a Department of Natural Resource and Environment, School of Agronomy , University of Buenos Aires , Buenos Aires City , Argentina
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Zhang X, Qin B, Deng J, Wells M. Whole-cell bioreporters and risk assessment of environmental pollution: A proof-of-concept study using lead. Environ Pollut 2017; 229:902-910. [PMID: 28779895 DOI: 10.1016/j.envpol.2017.07.068] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Revised: 07/02/2017] [Accepted: 07/21/2017] [Indexed: 06/07/2023]
Abstract
As the world burden of environmental contamination increases, it is of the utmost importance to develop streamlined approaches to environmental risk assessment in order to prioritize mitigation measures. Whole-cell biosensors or bioreporters and speciation modeling have both become of increasing interest to determine the bioavailability of pollutants, as bioavailability is increasingly in use as an indicator of risk. Herein, we examine whether bioreporter results are able to reflect expectations based on chemical reactivity and speciation modeling, with the hope to extend the research into a wider framework of risk assessment. We study a specific test case concerning the bioavailability of lead (Pb) in aqueous environments containing Pb-complexing ligands. Ligands studied include ethylene diamine tetra-acetic acid (EDTA), meso-2,3 dimercaptosuccinic acid (DMSA), leucine, methionine, cysteine, glutathione, and humic acid (HA), and we also performed experiments using natural water samples from Lake Tai (Taihu), the third largest lake in China. We find that EDTA, DMSA, cysteine, glutathione, and HA amendment significantly reduced Pb bioavailability with increasing ligand concentration according to a log-sigmoid trend. Increasing dissolved organic carbon in Taihu water also had the same effect, whereas leucine and methionine had no notable effect on bioavailability at the concentrations tested. We find that bioreporter results are in accord with the reduction of aqueous Pb2+ that we expect from the relative complexation affinities of the different ligands tested. For EDTA and HA, for which reasonably accurate ionization and complexation constants are known, speciation modeling is in agreement with bioreporter response to within the level of uncertainty recognised as reasonable by the United States Environmental Protection Agency for speciation-based risk assessment applications. These findings represent a first step toward using bioreporter technology to streamline the biological confirmation or validation of speciation modeling for use in environmental risk assessment.
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Affiliation(s)
- Xiaokai Zhang
- Department of Environmental Science, Xi'an Jiaotong-Liverpool University, Suzhou, Jiangsu 215123, People's Republic of China; Department of Environmental Science, University of Liverpool, Brownlow Hill, Liverpool L69 7ZX, United Kingdom
| | - Boqiang Qin
- Taihu Laboratory for Lake Ecosystem Research, State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, People's Republic of China
| | - Jianming Deng
- Taihu Laboratory for Lake Ecosystem Research, State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, People's Republic of China
| | - Mona Wells
- Department of Environmental Science, Xi'an Jiaotong-Liverpool University, Suzhou, Jiangsu 215123, People's Republic of China; Department of Environmental Science, University of Liverpool, Brownlow Hill, Liverpool L69 7ZX, United Kingdom.
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49
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Ding F, Chen H, Zhang S, Zhao T, Liu N. Effect of chelating agents on Reactive Green 19 decolorization through Fe 0-activated persulfate oxidation process. J Environ Manage 2017; 200:325-334. [PMID: 28595126 DOI: 10.1016/j.jenvman.2017.05.089] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Revised: 05/17/2017] [Accepted: 05/28/2017] [Indexed: 06/07/2023]
Abstract
The effect of chelating agents on the decolorization of Reactive Green 19 (RG19) through Fe0 activated persulfate (PS/Fe0) process was investigated. Though other previous studies reported that chelating agent can enhance the degradation of organic contaminant in Fenton-like system, our finding showed that the presence of chelating agents would chelate free Fe2+ and minimize free Fe2+ concentration, which resulted in the retardation of RG19 decolorization. RG19 decolorization decreased to 7%, 21%, and 15% in the presence of sodium citrate, sodium EDTA, and sodium oxalate, compared with control test (without chelating agent, 99%) within 10 min. The degradation efficiencies decreased with increasing chelating agent concentrations because of complex formation with Fe2+. Higher PS concentration, Fe0 dosage, and temperature had an obvious enhancement for RG19 decolorization efficiency. Elucidation of RG19 containing sodium EDTA degradation pathways indicated that PS/Fe0 process could degrade RG19 to carboxylic acids and inorganic salts efficiently. The presence of sodium EDTA had no influence on by-products, and EDTA just played a chelating agent function for chelating Fe ions.
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Affiliation(s)
- Feng Ding
- Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun, 130021, PR China
| | - Hong Chen
- Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun, 130021, PR China
| | - Sida Zhang
- Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun, 130021, PR China
| | - Tongjun Zhao
- Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun, 130021, PR China
| | - Na Liu
- Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun, 130021, PR China.
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50
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Wang Q, Franz KJ. The hydrolytic susceptibility of prochelator BSIH in aqueous solutions. Bioorg Med Chem Lett 2017; 27:4165-4170. [PMID: 28734582 DOI: 10.1016/j.bmcl.2017.07.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Accepted: 07/06/2017] [Indexed: 01/17/2023]
Abstract
The prochelator BSIH ((E)-N'-(2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzylidene)isonicotinohydrazide) contains a boronate group that prevents metal coordination until reaction with peroxide releases the iron chelator SIH ((E)-N'-(2-hydroxybenzylidene)isonicotinohydrazide). BSIH exists in aqueous buffer and cell culture media in equilibrium with its hydrolysis products isoniazid and (2-formylphenyl)boronic acid (FBA). The relative concentrations of these species limit the yield of intact SIH available for targeted iron chelation. While the hydrolysis fragments are nontoxic to retinal pigment epithelial cells, these results suggest that modifications to BSIH that improve its hydrolytic stability yet maintain its low inherent cytotoxicity are desirable for creating more efficient prochelators for protection against cellular oxidative damage.
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Affiliation(s)
- Qin Wang
- Duke University, Department of Chemistry, 124 Science Dr., Durham, NC 27708, USA
| | - Katherine J Franz
- Duke University, Department of Chemistry, 124 Science Dr., Durham, NC 27708, USA.
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