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Shim KB, In JJ, Lee JB, Han HG, Son SA, Lee WJ, Bae YJ, Kwon GY, An BK. Effects of the physical structure and surface charge of activated carbon on the reduction of biogenic amines in anchovy fish sauce. Food Chem 2024; 443:138399. [PMID: 38280364 DOI: 10.1016/j.foodchem.2024.138399] [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: 08/30/2023] [Revised: 12/12/2023] [Accepted: 01/06/2024] [Indexed: 01/29/2024]
Abstract
This study aimed to efficiently reduce a large number of biogenic amines in salt-fermented fish sauce while minimizing sensory reduction using various activated carbons. Aromatic amines, such as tryptamine and phenethylamine, were reduced by 86.1-100 % after treating with activated carbon. Histamine with a heterocyclic structure decreased by 13-42 %. No significant effects were observed on the levels of aliphatic amines, putrescine, cadaverine, spermine, and spermidine. The major taste component, amino acid nitrogen, was reduced to within 3 %, and brown color removal was reduced depending on the type of activated carbon used. Acid-modified AC-A and AC-B had rough surfaces, high total acidity, low point of zero charge (pHpzc), and rich surface functional groups. Owing to its smooth surface, low total acidity, high pHpzc, and few surface functional groups, AC-C exhibited a higher histamine elimination and less color reduction despite its lower surface area compared to other activated carbons.
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Affiliation(s)
- Kil Bo Shim
- Department of Food Science and Technology, Pukyong National University, 45 Yongso-ro, Nam-Gu, Busan 48513, Republic of Korea.
| | - Jung-Jin In
- Department of Food Science and Technology, Pukyong National University, 45 Yongso-ro, Nam-Gu, Busan 48513, Republic of Korea
| | - Jong Bong Lee
- Department of Food Science and Technology, Pukyong National University, 45 Yongso-ro, Nam-Gu, Busan 48513, Republic of Korea
| | - Hyeong Gu Han
- Department of Food Science and Technology, Pukyong National University, 45 Yongso-ro, Nam-Gu, Busan 48513, Republic of Korea
| | - Seong Ah Son
- Department of Food Science and Technology, Pukyong National University, 45 Yongso-ro, Nam-Gu, Busan 48513, Republic of Korea
| | - Woo Jin Lee
- Department of Food Science and Technology, Pukyong National University, 45 Yongso-ro, Nam-Gu, Busan 48513, Republic of Korea
| | - Yeon Joo Bae
- Department of Food Science and Technology, Pukyong National University, 45 Yongso-ro, Nam-Gu, Busan 48513, Republic of Korea
| | - Ga Yeon Kwon
- Department of Food Science and Technology, Pukyong National University, 45 Yongso-ro, Nam-Gu, Busan 48513, Republic of Korea
| | - Byoung Kyu An
- Department of Food Science and Technology, Pukyong National University, 45 Yongso-ro, Nam-Gu, Busan 48513, Republic of Korea
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Ghibaudo N, Ferretti M, Al-Hetlani E, Madkour M, Amin MO, Alberti S. Synthesis and characterization of TiO 2-based supported materials for industrial application and recovery in a pilot photocatalytic plant using chemometric approach. Environ Sci Pollut Res Int 2024; 31:20556-20567. [PMID: 38376776 DOI: 10.1007/s11356-024-32467-y] [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: 11/22/2023] [Accepted: 02/09/2024] [Indexed: 02/21/2024]
Abstract
In this contribution, the performance of powdered titanium dioxide (TiO2)-based photocatalysts was evaluated in a pilot photocatalytic plant for the degradation of different dyes, with an investigated volume of 1 L and solar simulated light as irradiation source. Five different samples, synthesized in our laboratories, were tested in the pilot plant, each consisting of TiO2 nanoparticles (NPs) coupled with a different material (persistent luminescent material and semiconductor material) and treated in different thermal conditions. All synthesized samples have been subjected to X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Brunauer-Emmett-Teller analysis (BET), and transmission electron microscopy (TEM) characterization, to shed light on the influence of introducing other materials on titania characteristics. To study and evaluate the significance of the parameters affecting the process in the pilot plant, a chemometric approach was applied, by selecting a mathematical model (D-Optimal) to simultaneously monitor a large number of variables (i.e., 7), both qualitative and quantitative, over a wide range of levels. At the same time, the recovery of the synthesized photocatalysts was studied following a novel promising recuperation method, i.e., annulling the surface charge of the suspended samples by reaching the isoelectric point (pHPZC) of each sample, for the quantitative precipitation of TiO2 nanoparticles.
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Affiliation(s)
- Nicolò Ghibaudo
- Chemistry and Industrial Chemistry Department, University of Genoa, Via Dodecaneso 31, 16146, Genoa (Ge), Italy
| | - Maurizio Ferretti
- Chemistry and Industrial Chemistry Department, University of Genoa, Via Dodecaneso 31, 16146, Genoa (Ge), Italy
| | - Entesar Al-Hetlani
- Chemistry Department, Faculty of Science, Kuwait University, P.O. Box 5969, 13060, Safat, Kuwait
| | - Metwally Madkour
- Chemistry Department, Faculty of Science, Arish University, Al-Arish, 45511, Egypt
| | - Mohamed O Amin
- Chemistry Department, Faculty of Science, Kuwait University, P.O. Box 5969, 13060, Safat, Kuwait
| | - Stefano Alberti
- Chemistry and Industrial Chemistry Department, University of Genoa, Via Dodecaneso 31, 16146, Genoa (Ge), Italy.
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3
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Kosmulski M. The pH dependent surface charging and points of zero charge. X. Update. Adv Colloid Interface Sci 2023; 319:102973. [PMID: 37573830 DOI: 10.1016/j.cis.2023.102973] [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] [Received: 05/26/2023] [Revised: 07/31/2023] [Accepted: 08/01/2023] [Indexed: 08/15/2023]
Abstract
Surfaces are often characterized by their points of zero charge (PZC) and isoelectric points (IEP). Different authors use these terms for different quantities, which may be equal to the actual PZC under certain conditions. Several popular methods lead to results which are inappropriately termed PZC. This present review is limited to zero-points obtained in the presence of inert electrolytes (halides, nitrates, and perchlorates of the 1st group metals). IEP are reported for all kinds of materials. PZC of metal oxides obtained as common intersection points of potentiometric curves for 3 or more ionic strengths (or by means of equivalent methods) are also reported, while the apparent PZC obtained by mass titration, pH-drift method, etc. are deliberately neglected. The results published in the recent publications and older results overlooked in the previous compilations by the same author are reported. The PZC/IEP are accompanied by information on the temperature and on the nature and concentration of supporting electrolyte (if available). The references to previous reviews by the same author allow to compare the newest results with the PZC/IEP of similar materials from the older literature.
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Affiliation(s)
- Marek Kosmulski
- Lublin University of Technology, Nadbystrzycka 38, PL-20618 Lublin, Poland.
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4
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Caniglia G, Teuber A, Barth H, Mizaikoff B, Kranz C. Atomic force and infrared spectroscopic studies on the role of surface charge for the anti-biofouling properties of polydopamine films. Anal Bioanal Chem 2022. [PMID: 36434170 DOI: 10.1007/s00216-022-04431-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 10/27/2022] [Accepted: 11/08/2022] [Indexed: 11/26/2022]
Abstract
Antibacterial polymer materials have gained interest due to their capability to inhibit or eradicate biofilms with greater efficiency in comparison with their monomeric counterparts. Among the antimicrobial and anti-biofouling polymers, catecholamine-based polymers - and in particular polydopamine - have been studied due to their favorable adhesion properties, which can be tuned by controlling the pH value. In this study, we used atomic force microscopy (AFM)-based spectroscopy to investigate the relation between the adhesion properties and surface charge density and the pH of electrochemically deposited polydopamine films presenting a dissociation constant of polydopamine of 6.3 ± 0.2 and a point of zero charge of 5.37 ± 0.06. Furthermore, using AFM and attenuated total reflection-Fourier transform infrared spectroscopy (ATR-FTIR), the influence of the surface charge density of polydopamine on bacterial adhesion and biofilm formation was investigated. It was shown that the adhesion of Escherichia coli at positively charged polydopamine is three times higher compared to a negatively charged polymer, and that the formation of biofilms is favored at positively charged polymers.
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Kosmulski M. The pH dependent surface charging and points of zero charge. IX. Update. Adv Colloid Interface Sci 2021; 296:102519. [PMID: 34496320 DOI: 10.1016/j.cis.2021.102519] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [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: 06/21/2021] [Revised: 08/26/2021] [Accepted: 08/27/2021] [Indexed: 01/23/2023]
Abstract
of the points of zero charge (PZC) and isoelectric points (IEP) of various materials published in the recent literature and of older results overlooked in the previous compilations. The roles of experimental conditions, especially of the temperature, of the nature and concentration of supporting electrolyte, and of the type of apparatus are emphasized. The newest results are compared with the zero points reported in previous reviews. Most recent studies were carried out with materials whose pH dependent surface charging is already well-documented, and the newest results are consistent with the older literature. Isoelectric points of Gd(OH)3, Sm(OH)3, and TeO2 have been reported for the first time in the recent literature.
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Affiliation(s)
- Marek Kosmulski
- Lublin University of Technology, Nadbystrzycka 38, PL-20618 Lublin, Poland.
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Kumar D, Priyadarshini CH, Sudha V, Sherine J, Harinipriya S, Pal S. Investigation of Adsorption Behavior of Anticancer Drug on Zinc Oxide Nanoparticles: A Solid State NMR and Cyclic Voltammetry (CV) Analysis. J Pharm Sci 2021; 110:3726-3734. [PMID: 34363840 DOI: 10.1016/j.xphs.2021.08.003] [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] [Received: 01/24/2021] [Revised: 07/17/2021] [Accepted: 08/02/2021] [Indexed: 11/27/2022]
Abstract
The present study aims to comprehend the adsorption behavior of a set of anticancer drugs namely 5-fluorouracil (5-FU), doxorubicin and daunorubicin on ZnO nanoparticles (ZnO NPs) proposed as drug delivery systems employing solid state (ss) NMR, FTIR and Cyclic Voltammetry (CV) analysis. FTIR and 1H MAS ssNMR data recorded for bare ZnO nanoparticle confirmed the presence of adsorbed -OH groups on the surface. 13C CP-MAS NMR spectra recorded for free and ZnO surface adsorbed drug samples exhibited considerable line broadening and chemical shift changes that complemented our earlier report on UV-DRS and XRD data of surface adsorption in case of 5-FU. Moreover, a remarkable enhancement of 13C signal intensity in case of loaded 5-FU was observed. This clearly indicated rigid nature of the drug on the surface allowing efficient transfer of 1H polarization from the hetero nitrogen of 5-FU to ZnO to form surface hydroxyl (-OH) groups and the same has been observed in the quantum chemical calculations. To further analyze the motional dynamics of the surface adsorbed 5-FU, longitudinal relaxation times (T1) were quantified employing Torchia method that revealed significant enhancement of 13C relaxation rate of adsorbed 5-FU. The enhanced rate suggested an effective role of quadrupolar contribution from 67Zn to the 13C relaxation mechanism of ZnO_5-FU. The heterogeneous rate constant (khet), average free energy of activation (∆G≠) and point of zero charge (PZC) measured for free and drug loaded ZnO NPs samples using CV further support the SS-NMR results.
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Affiliation(s)
- Deepak Kumar
- Department of Chemistry, Indian Institute of Technology Jodhpur, NH 65, Karwar, Jodhpur, India 342037
| | - C Hepsibah Priyadarshini
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur, Chennai, India 603203
| | - V Sudha
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur, Chennai, India 603203
| | - Jositta Sherine
- Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Kattankulathur, Chennai, India 603203
| | - S Harinipriya
- Division of Energy and Environment, Inventus Bio Energy Private Limited, Chengalpattu, Tamil Nadu, India 603111
| | - Samanwita Pal
- Department of Chemistry, Indian Institute of Technology Jodhpur, NH 65, Karwar, Jodhpur, India 342037.
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Letshwenyo MW, Mokgosi S. Investigation of water treatment sludge from drinking water treated with Zetafloc 553I coagulant for phosphorus removal from wastewater. J Environ Manage 2021; 282:111909. [PMID: 33465719 DOI: 10.1016/j.jenvman.2020.111909] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [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: 08/16/2020] [Revised: 12/09/2020] [Accepted: 12/24/2020] [Indexed: 06/12/2023]
Abstract
Water treatment sludge have shown promising results as adsorbent for phosphorus and sulphate removal from real wastewater. The study was conducted through batch kinetics and equilibrium isotherm modes. The chemical composition reveal that aluminium compounds were dominant in the fresh sludge and aluminium phosphates were also observed in the used sludge. The results reveal that Manganese was leached from the material at all pH values investigated with the highest level observed at pH 2 and all concentrations higher than the national standard of discharge into the relevant environment. The point of zero charge of the adsorbent was pH 8.04 and high adsorption capacities for both sulphate and phosphate ions were observed at pH values lower than this point. Batch kinetic results revealed 96.0 ± 3.0% sulphates removal in the first 30 min whereas the highest phosphates removal was 88.0 ± 4.0% attained at 300 min of the experiment. Pseudo - second order reaction fitted the data better than Pseudo-first order reaction. The percentage removal of sulphates was observed decreasing with increasing adsorbent dose after 2.4 g dose but removal increased with increasing media dosage for phosphorus. The equilibrium data was better described by Freundlich isotherm with constants relating to adsorption capacities being 6.76 and 6.2 L g-1 respectively, for sulphates and phosphates adsorption. The adsorption capacity of phosphates was observed decreasing with increasing temperature, but the results were not conclusive in the case of sulphates. The results reveal that copper, nickel, and zinc have affinity for sulphates. The water treatment sludge can be used for phosphate and sulphate removal from wastewater though the leachability of manganese is a concern. Further investigations through fixed bed columns will need to be investigated before field trials. In conclusion, the sludge can be used as adsorbent for phosphorus and sulphates removal from wastewater through filtration and onsite treatment methods such as vertical or horizontal flow wetland systems. The success of the adsorbent will reduce the costs associated with its disposal which can also lead to leachability of metals into the environment with time.
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Affiliation(s)
- Moatlhodi Wise Letshwenyo
- Botswana International University of Science and Technology, Department of Civil and Environmental Engineering, Private Bag 16, Palapye, Botswana.
| | - Serwalo Mokgosi
- Botswana International University of Science and Technology, Department of Earth and Environmental Sciences, Private Bag 16, Palapye, Botswana
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8
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Tran HN. Comments on "Fast and efficient removal of Cr(VI) to ppb level together with Cr(III) sequestration in water using layered double hydroxide interclated with diethyldithiocarbamate". Sci Total Environ 2020; 746:139854. [PMID: 32646622 DOI: 10.1016/j.scitotenv.2020.139854] [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] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 05/29/2020] [Accepted: 05/29/2020] [Indexed: 06/11/2023]
Abstract
This paper primarily aimed to provide some concerns and continue discussion about the previous published paper in this journal. First, when the mechanism of Cr(VI) removal from solution involved in adsorption-coupled reduction was proposed, the X-ray photoelectron spectroscopy (XPS) of Cr 2p spectrum of laden adsorbent (i.e., DDTC-LDH after adsorption) needs to demonstrate the co-existence of Cr(VI) and Cr(III). The detection of reduced Cr(III) in solution after the completed adsorption of Cr(VI) only provides information on the mechanism regarding reduction, not adsorption-coupled reduction. Second, adsorption mechanism (chemisorption or physisorption) cannot be drawn only based on the best statistical fit between the time-dependent data of adsorption experiment and the kinetic model (i.e., the pseudo-second-order, Elovich, or Avrami model). Third, the constant KRP (liters per grams of adsorbent not adsorbate; L/g) of the Redlich-Peterson isotherm model is not equal to or used as the thermodynamic equilibrium constant KEqo. The application of the constant KRP for calculating the thermodynamic parameters of adsorption process (∆G°, ∆H°, and ∆G°) using the van't Hoff equation leads to a certain error in the values (sign and magnitude) of those parameters. Fourth, the pHPZC of adsorbent is significant different to its pHIEP on both meanings and analysis methods. The use of those terminologies in the fields of material and sorption (adsorption and absorption) must be correct. Finally, some important information needs to provide in the studies of adsorption isotherm and mechanism (i.e., solution pH) and characteristics of diethyldithiocarbamate intercalated-LDH (i.e., arrangement and orientation of diethyldithiocarbamate in the interlayer region of DDTC-LDH).
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Affiliation(s)
- Hai Nguyen Tran
- Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh City 700000, Vietnam; Faculty of Environmental and Chemical Engineering, Duy Tan University, Da Nang 550000, Vietnam.
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9
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Tran HN. Comments on "High-efficiency removal of dyes from wastewater by fully recycling litchi peel biochar". Chemosphere 2020; 257:126444. [PMID: 32241559 DOI: 10.1016/j.chemosphere.2020.126444] [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: 01/25/2020] [Revised: 03/03/2020] [Accepted: 03/06/2020] [Indexed: 06/11/2023]
Abstract
This paper provided further discussion on some identified mistakes and inconsistencies. Such problems included (1) the determination and discussion on the pHPZC value of the biochar, (2) the excellent adsorption capacity of the biochar toward the dye contaminant, (3) the proposd adsorption mechanism (i.e., chemical adsorption) only based on the best fitting of the experimental data to the kinetic model (i.e., the pseudo-second-order or Elovich model), (4) the conception on the Freundlich model, and (5) the presentation of the adsorption mechanism involved in hydrogen bonding. Some other potential problems regarding the determination of adsorption capacity of an adsorbent towards an adsorbate (qe; mg/g) were additionally discussed herein. It gives readers a gentle reminder that the initial concentration of adsorbate (also known as the blank sample; Co) always plays a vital role in accurately calculating the qe value. The Co value from experiment (i.e., 254 mg/L or 245 mg/L) is often dissimilar to the Co value from theory (i.e., 250 mg/L). The difference becomes enormously significant when the Co value reaches very high concentration (i.e., 1000 mg/L) because an extremely high dilution factor is applied to determine the concentration of adsorbate in solution. The author hopes that the comments and contents in this paper will be particularly helpful for other researchers who are interested in the field of adsorption science and technology. Some highly-readable recent publications, which comprise the different types of paper as "comment", "discussion", "perspective", and "critical review", have also introduced in this paper. The expert reviewers and editors should give a great concern to such problems for further evaluations of submitted manuscripts in the field.
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Affiliation(s)
- Hai Nguyen Tran
- Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh 70000, Viet Nam; Faculty of Environment and Chemical Engineering, Duy Tan University, Danang 550000, Viet Nam.
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10
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Lützenkirchen J, Barišić A, Lefévre G, Begović T. Electrokinetic mobility, pH and conductance/conductivity data for aqueous silica and PTFE suspension of controlled composition for selected temperature ranges. Data Brief 2019; 25:104354. [PMID: 31463349 DOI: 10.1016/j.dib.2019.104354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Revised: 07/22/2019] [Accepted: 07/26/2019] [Indexed: 11/29/2022] Open
Abstract
The Data in Brief contains data on the electrokinetic mobility of PTFE and silica particles in aqueous suspensions as a function of pH and temperature. Furthermore, the concomitant conductivities and pH values are reported both for systems in the absence and presence of PTFE particles as a function of temperature and are compatible with the associated research paper “The influence of temperature on the charging of Polytetrafluoroethylene surfaces in electrolyte solutions” (Barisic et al.). The trend of the electrokinetic charging with temperature can be inferred from this for both kinds of particles. The data on the evolution of the pH and the measured conductivities are valuable input for future models that simulate the charge of inert surfaces at variable temperature.
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11
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García-Rodríguez JP, Amezquita-Garcia HJ, Escamilla-Alvarado C, Rangel-Mendez JR, Gutiérrez-García K. Biofilm microbial composition changes due to different surface chemical modifications of activated carbon cloths in the biotransformation of 4-nitrophenol. Biodegradation 2019; 30:401-413. [PMID: 31187383 DOI: 10.1007/s10532-019-09880-z] [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: 12/06/2018] [Accepted: 06/04/2019] [Indexed: 11/29/2022]
Abstract
Activated carbon cloths (ACCs) were used as biofilms supports in the anaerobic biotransformation of 4-nitrophenol (4NP). As received ACC material (AW) was oxidized with HNO3 (OX) and then functionalized with anthraquinone-2,6-disulfonate (AQ). The three ACCs were packed in hybrid UASB reactors and seeded with anaerobic granular sludge for biotransformation experiments. The results indicated that ACC-packed bioreactors improved the biotransformation of 4NP by twofold as compared to the control reactor without support materials. However, the biotransformation effciency of AW, OX and AQ was very similar (59%), indicating the role of ACC as biofilm support and not as redox mediator. After 4NP biotransformation several physicochemical and biological changes were observed like (1) the point of zero charge (pHPZC) shift from acidic values (AW = 5.0, OX = 3.4, AQ = 3.1) to neutral values (pHPZC = 7.6 on average), (2) increase in the concentration of acidic and basic surface functional groups over ACC materials and the amount of supported biomass on ACCs due to biofilm formation, and (3) enrichment of exoelectrogenic microorganisms belonging to the genera Geobacter over carbonyl-rich ACC surface as revealed by 16S rRNA amplicon sequencing. Overall, the results suggest that chemical modifications of ACCs changed the microbial composition of the biofilm, but the higher concentration of carbonyl groups on ACC did not affect the biotransformation of 4NP.
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Affiliation(s)
- J P García-Rodríguez
- Facultad de Ciencias Químicas, Universidad Autónoma de Nuevo León, Av. Universidad s/n, Cd, Universitaria, 66455, San Nicolás de los Garza, NL, Mexico
| | - H J Amezquita-Garcia
- Facultad de Ciencias Químicas, Universidad Autónoma de Nuevo León, Av. Universidad s/n, Cd, Universitaria, 66455, San Nicolás de los Garza, NL, Mexico. .,Centro de Investigacion en Biotecnologia y Nanotecnologia (CIByN), Facultad de Ciencias Químicas, Universidad Autónoma de Nuevo León, Parque de Investigacion e Innovacion Tecnologica, Km. 10 Autopista al Aeropuerto Internacional Mariano Escobedo, 66629, Apodaca, NL, Mexico.
| | - C Escamilla-Alvarado
- Facultad de Ciencias Químicas, Universidad Autónoma de Nuevo León, Av. Universidad s/n, Cd, Universitaria, 66455, San Nicolás de los Garza, NL, Mexico.,Centro de Investigacion en Biotecnologia y Nanotecnologia (CIByN), Facultad de Ciencias Químicas, Universidad Autónoma de Nuevo León, Parque de Investigacion e Innovacion Tecnologica, Km. 10 Autopista al Aeropuerto Internacional Mariano Escobedo, 66629, Apodaca, NL, Mexico
| | - J R Rangel-Mendez
- División de Ciencias Ambientales, Instituto Potosino de Investigación Científica y Tecnológica, Camino a la Presa San José 2055, Col. Lomas 4a Sección, C.P. 78216, San Luis Potosí, Mexico
| | - K Gutiérrez-García
- Evolution of Metabolic Diversity Laboratory, Unidad de Genómica Avanzada (Langebio), Cinvestav-IPN, Km 9.6 Libramiento Norte, Carretera Irapuato-León, Irapuato, C.P. 36821, Guanajuato, Mexico
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Korolev VA, Nesterov DS. Regulation of clay particles charge for design of protective electrokinetic barriers. J Hazard Mater 2018; 358:165-170. [PMID: 29990803 DOI: 10.1016/j.jhazmat.2018.06.023] [Citation(s) in RCA: 5] [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] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 06/09/2018] [Accepted: 06/11/2018] [Indexed: 06/08/2023]
Abstract
Coupled electrokinetic protective reactive barriers (PRB) are considered as a perspective technology for the treatment of contaminated groundwater. Design of PRB is directly connected with a problem of barrier material choice. Clays can be considered as an appropriate material due to high adsorptive properties and relative cheapness. The barrier internals are formed by clay surface charge properties. We revealed that acidic and alkaline treatment of clay is an effective way to affect its protective properties so that clay can be used to treat various pollutants. Surface charge and electrokinetic properties of clays were characterized by point of zero charge (p.z.c.), point of zero net proton charge (p.z.n.p.c.) and ζ-potential at different pH. Suspensions of 3 main clay types were studied by microelectrophoresis and potentiometric titration methods. At pH > p.z.n.p.c. clayey barrier adsorbs predominantly cationic toxicants and at pH < p.z.c. - anionic ones. The barrier is seemed to be the least effective in pH range between p.z.c. and p.z.n.p.c. Given the physicochemical and electrokinetic parameters, the most efficient clays for barrier design are Cambrian illite and all montmorillonite clays.
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Affiliation(s)
- V A Korolev
- Lomonosov Moscow State University, Faculty of Geology, Department of Engineering and Ecological Geology, 119991, Leninskiye Gory, 1-1, Moscow, Russia
| | - D S Nesterov
- Lomonosov Moscow State University, Faculty of Geology, Department of Engineering and Ecological Geology, 119991, Leninskiye Gory, 1-1, Moscow, Russia.
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Bakatula EN, Richard D, Neculita CM, Zagury GJ. Determination of point of zero charge of natural organic materials. Environ Sci Pollut Res Int 2018; 25:7823-7833. [PMID: 29294236 DOI: 10.1007/s11356-017-1115-7] [Citation(s) in RCA: 101] [Impact Index Per Article: 16.8] [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: 05/20/2017] [Accepted: 12/20/2017] [Indexed: 05/28/2023]
Abstract
This study evaluates different methods to determine points of zero charge (PZCs) on five organic materials, namely maple sawdust, wood ash, peat moss, compost, and brown algae, used for the passive treatment of contaminated neutral drainage effluents. The PZC provides important information about metal sorption mechanisms. Three methods were used: (1) the salt addition method, measuring the PZC; (2) the zeta potential method, measuring the isoelectric point (IEP); (3) the ion adsorption method, measuring the point of zero net charge (PZNC). Natural kaolinite and synthetic goethite were also tested with both the salt addition and the ion adsorption methods in order to validate experimental protocols. Results obtained from the salt addition method in 0.05 M NaNO3 were the following: 4.72 ± 0.06 (maple sawdust), 9.50 ± 0.07 (wood ash), 3.42 ± 0.03 (peat moss), 7.68 ± 0.01 (green compost), and 6.06 ± 0.11 (brown algae). Both the ion adsorption and the zeta potential methods failed to give points of zero charge for these substrates. The PZC of kaolinite (3.01 ± 0.03) was similar to the PZNC (2.9-3.4) and fell within the range of values reported in the literature (2.7-4.1). As for the goethite, the PZC (10.9 ± 0.05) was slightly higher than the PZNC (9.0-9.4). The salt addition method has been found appropriate and convenient to determine the PZC of natural organic substrates.
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Affiliation(s)
- Elisee Nsimba Bakatula
- RIME-Research Institute on Mines and Environment, Montréal, Canada
- Department of Civil, Geological, and Mining Engineering-École Polytechnique de Montréal, Montréal, QC, H3C 3A7, Canada
| | - Dominique Richard
- RIME-Research Institute on Mines and Environment, Montréal, Canada
- Department of Civil, Geological, and Mining Engineering-École Polytechnique de Montréal, Montréal, QC, H3C 3A7, Canada
| | | | - Gerald J Zagury
- RIME-Research Institute on Mines and Environment, Montréal, Canada.
- Department of Civil, Geological, and Mining Engineering-École Polytechnique de Montréal, Montréal, QC, H3C 3A7, Canada.
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Kosmulski M. The pH dependent surface charging and points of zero charge. VII. Update. Adv Colloid Interface Sci 2018; 251:115-38. [PMID: 29153243 DOI: 10.1016/j.cis.2017.10.005] [Citation(s) in RCA: 99] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Revised: 10/25/2017] [Accepted: 10/25/2017] [Indexed: 02/06/2023]
Abstract
The pristine points of zero charge (PZC) and isoelectric points (IEP) of metal oxides and IEP of other materials from the recent literature, and a few older results (overlooked in previous searches) are summarized. This study is an update of the previous compilations by the same author [Surface Charging and Points of Zero Charge, CRC, Boca Raton, 2009; J. Colloid Interface Sci. 337 (2009) 439; 353 (2011) 1; 426 (2014) 209]. The field has been very active, but most PZC and IEP are reported for materials, which are very well-documented already (silica, alumina, titania, iron oxides). IEP of (nominally) Gd2O3, NaTaO3, and SrTiO3 have been reported in the recent literature. Their IEP were not reported in older studies.
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