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Kareem A, Thenmozhi K, Hari S, Ponnusamy VK, Senthilkumar S. Metal-free carbon-based anode for electrochemical degradation of tetracycline and metronidazole in wastewater. Chemosphere 2024; 351:141219. [PMID: 38224750 DOI: 10.1016/j.chemosphere.2024.141219] [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: 09/17/2023] [Revised: 12/09/2023] [Accepted: 01/12/2024] [Indexed: 01/17/2024]
Abstract
Degradation of antibiotics through electrocatalytic oxidation has recently been comprehended as a promising strategy in wastewater treatment. Herein, nitrogen and sulphur doped graphene oxide (N,S-rGO) nanosheets were synthesized and employed as metal-free anodic material for electrochemical degradation of antibiotics, viz. metronidazole (MNZ) and tetracycline (TC). The synthesized anodic material was characterized using various spectral techniques and further the electrochemical behaviour of N,S-rGO was thoroughly examined. Thereafter, the N,S-rGO material was then employed as the anode material towards the electrocatalytic degradation of antibiotics. Parameters such as initial concentration of the antibiotics and current densities were varied and their effect towards the degradation of MNZ and TC were probed. Notably, the N,S-rGO based anode has shown impressive removal efficiency of 99% and 98.5%, after 120 min of reaction time for MNZ and TC, respectively, under optimized conditions. The obtained results including the kinetic parameters, removal efficiency and electrical efficiency ensure that the prepared anodic material has huge prospective towards real-time application for removal of antibiotics from water.
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Affiliation(s)
- Abdul Kareem
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology (VIT), Vellore, 632014, Tamil Nadu, India
| | - Kathavarayan Thenmozhi
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology (VIT), Vellore, 632014, Tamil Nadu, India
| | - Shankar Hari
- Department of Physics, KPR Institute of Engineering and Technology, Coimbatore, 641407, Tamil Nadu, India
| | - Vinoth Kumar Ponnusamy
- Department of Medicinal and Applied Chemistry & Research Center for Environmental Medicine, Kaohsiung Medical University (KMU), Kaohsiung City, 807, Taiwan
| | - Sellappan Senthilkumar
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology (VIT), Vellore, 632014, Tamil Nadu, India.
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Sharan S, Khare P, Shankar R, Mishra NK, Tyagi A. Bimetal-oxide (Fe/Co) modified bagasse-waste carbon coated on lead oxide-battery electrode for metronidazole removal. J Environ Manage 2023; 347:119104. [PMID: 37793292 DOI: 10.1016/j.jenvman.2023.119104] [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: 05/25/2023] [Revised: 08/17/2023] [Accepted: 09/01/2023] [Indexed: 10/06/2023]
Abstract
Current study covers the preparation and application of a commercial modified lead oxide battery electrode (LBE) in electrochemical oxidation (ECO) of metronidazole (MNZ) in an aqueous phase. Modified electrode is prepared by doping of bimetal-oxide (Fe and Zn) nanoparticles (NPs) & single metal-oxide (Fe/Zn) on bagasse-waste carbon (bwc) which is further coated on LBE. The modified LBE electrode surface was examined for metal-oxide NPs through X-ray diffraction analysis (XRD). Different electrodes are prepared by varying combinations of two metal-oxide based on molar ratio and tested for electrochemical characterization and MNZ removal test. Based on large oxygen evolution potential in a linear sweep volumetry (LSV) analysis and high MNZ removal rate, the best electrode has been represented as Fe1:Co2-bwc/LBE which contains Fe & Co molar ratio of 1:2. Moreover, equilibrium attained at faster rate in degradation process of MNZ, where pseudo first order kinetics of 2.29 × 10-2 min-1 was obtained under optimized condition of (MNZ:100 mg/L, pH:7, CD: 30 mA/cm2 and electrolyte: 0.05 M Na2SO4). Maximum MNZ removal, total organic carbon removal (TOC), mineralization current efficiency (MCE) & energy consumption (EC) of 98.7%, 85.3%, 62.2% & 96.143 kW h/kg-TOC removed are found in 180 min of treatment time for Fe1:Co2-bwc/LBE electrode. Accelerated service life test confirms that the stability of modified electrode is enhanced by 1.5 times compared to pristine LBE. Repeatability test confirms that modified LBE (Fe1:Co2-bwc/LBE) can be utilized up to 3 times.
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Affiliation(s)
- Shambhoo Sharan
- Department of Chemical Engineering, Madan Mohan Malviya University of Technology, Gorakhpur, 273010, Uttar Pradesh, India.
| | - Prateek Khare
- Department of Chemical Engineering, Madan Mohan Malviya University of Technology, Gorakhpur, 273010, Uttar Pradesh, India.
| | - Ravi Shankar
- Department of Chemical Engineering, Madan Mohan Malviya University of Technology, Gorakhpur, 273010, Uttar Pradesh, India.
| | - Navneet Kumar Mishra
- Department of Chemical Engineering, Madan Mohan Malviya University of Technology, Gorakhpur, 273010, Uttar Pradesh, India
| | - Ankit Tyagi
- Department of Chemical Engineering, Indian Institute of Technology Jammu, 181221, India.
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Lykos C, Kourkouta T, Konstantinou I. Study on the photocatalytic degradation of metronidazole antibiotic in aqueous media with TiO 2 under lab and pilot scale. Sci Total Environ 2023; 870:161877. [PMID: 36716886 DOI: 10.1016/j.scitotenv.2023.161877] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Revised: 01/24/2023] [Accepted: 01/24/2023] [Indexed: 06/18/2023]
Abstract
Nowadays, the increased consumption of antibiotics, such as metronidazole (MTZ), leads to their introduction in wastewater as well as in the receiving surface waters due to their incomplete removal by conventional wastewater treatment plants. Heterogeneous photocatalysis is a versatile technology that can efficiently degrade such organic contaminants. In the present research, the photocatalytic degradation of MTZ with TiO2 P25 was studied under lab and pilot (CPC reactor) conditions. The antibiotic was efficiently removed at high rates in both cases (100 % and 91 %) following pseudo-first order kinetics with rate constants equal to 0.0452 min-1 (±RSD% = 0.68 % - 2.57 %) and 0.0462 L KJ-1 (±RSD% = 8.94 % - 21.64 %) respectively. Also, by scavenging lab scale experiments, the contribution of the generated reactive species was investigated and hydroxy radicals (HO•) were proposed as the predominant species. By applying high resolution mass spectrometry techniques, the transformation products (TPs) were identified and possible transformation pathways were proposed. The ecotoxicity of the TPs was assessed in silico using the ECOSAR software with the results revealing that most of them were less toxic than the parent compound. Similarly, the mutagenicity, developmental toxicity and bioconcentration factors of the TPs were predicted by utilizing the T.E.S.T. software and in their majority, were found to be less mutagenic and developmentally toxic than MTZ. The ecotoxicity monitoring with the Vibrio fischeri bioassay in both laboratory and pilot scale experiments indicated that through heterogeneous photocatalysis it is possible to reduce the toxicity of wastewater containing MTZ. Finally, the stability and reusability of the photocatalyst was investigated through three consecutive catalytic cycles with the results showing that the performance of TiO2 decreased after each use. For the heterogeneous photocatalysis with TiO2 to be a "real life" applicable technique, further studies focusing on catalyst regeneration and optimization of the catalytic conditions must be conducted.
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Affiliation(s)
- Christos Lykos
- Department of Chemistry, University of Ioannina, Ioannina 45110, Greece
| | | | - Ioannis Konstantinou
- Department of Chemistry, University of Ioannina, Ioannina 45110, Greece; Institute of Environment and Sustainable Development, University Research Center of Ioannina (URCI), Ioannina 45110, Greece.
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Zhang H, Zou H, Zhao L, Li X. Seasonal distribution and dynamic evolution of antibiotics and evaluation of their resistance selection potential and ecotoxicological risk at a wastewater treatment plant in Jinan, China. Environ Sci Pollut Res Int 2023; 30:44505-44517. [PMID: 36690854 DOI: 10.1007/s11356-023-25202-6] [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: 07/29/2022] [Accepted: 01/04/2023] [Indexed: 06/17/2023]
Abstract
The seasonal distribution and dynamic evolution of antibiotics in wastewater from main treatment areas and in sludge and their resistance selection potential and ecotoxicological risk were studied at a municipal wastewater treatment plant in Jinan, East China. Ten antibiotics were selected, and all were detected in wastewater and sludge samples, with fluoroquinolones showing the highest detection concentrations and frequencies. Seasonal fluctuations in the antibiotic concentrations in the influent, effluent, and sludge were observed, with the highest values in winter in most cases. The dynamic evolution of antibiotics during the treatment process differed among the seasons. The antibiotic removal efficiencies were incomplete, ranging from - 40.47 to 100%. Mass balance analysis showed that sulfonamides, roxithromycin, and metronidazole were mainly removed through biological processing, whereas fluoroquinolones, doxycycline, and chloramphenicol were removed through sludge adsorption. Levofloxacin, as well as a mixture of the 10 antibiotics from the effluent, could pose a low ecotoxicological risk to Daphnia in the receiving waters. Additionally, levofloxacin and ciprofloxacin in the effluent and ciprofloxacin and metronidazole in the sludge may facilitate the selection of antibiotic-resistant bacteria in the environment.
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Affiliation(s)
- Hui Zhang
- Department of Environment and Health, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Huiyun Zou
- Department of Environment and Health, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Ling Zhao
- Department of Environment and Health, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Xuewen Li
- Department of Environment and Health, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China.
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Belchik SE, Oba PM, Wyss R, Asare PT, Vidal S, Miao Y, Adesokan Y, Suchodolski JS, Swanson KS. Effects of a milk oligosaccharide biosimilar on fecal characteristics, microbiota, and bile acid, calprotectin, and immunoglobulin concentrations of healthy adult dogs treated with metronidazole. J Anim Sci 2023; 101:skad011. [PMID: 36617268 PMCID: PMC9912710 DOI: 10.1093/jas/skad011] [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: 10/10/2022] [Accepted: 01/05/2023] [Indexed: 01/09/2023] Open
Abstract
In recent dog and cat experiments, a novel milk oligosaccharide biosimilar (GNU100) positively modulated fecal microbiota and metabolite profiles, suggesting benefits to gastrointestinal health. The objective of this study was to investigate the effects of GNU100 on the fecal characteristics, microbiota, and bile acid (BA) concentrations of healthy adult dogs treated with antibiotics. Twelve healthy adult female dogs (mean age: 3.74 ± 2.4 yr) were used in an 8-wk crossover design study (dogs underwent both treatments). All dogs were fed a control diet during a 2-wk baseline, then randomly allotted to 1 of 2 treatments (diet only or diet + 1% GNU100) for another 6 wk. From weeks 2 to 4, dogs were orally administered metronidazole (20 mg/kg BW) twice daily. Fecal scores were recorded daily and fresh fecal samples were collected at weeks 2, 4, 5, 6, and 8 for measurement of pH, dry matter, microbiota populations, and BA, immunoglobulin A, and calprotectin concentrations. On weeks 0, 4, and 8, blood samples were collected for serum chemistry and hematology analysis. All data were analyzed as repeated measures using the Mixed Models procedure of SAS version 9.4, with significance considered P < 0.05. Metronidazole increased (P < 0.0001) fecal scores (looser stools) and modified (P < 0.05) fecal microbiota and BA profiles. Using qPCR, metronidazole reduced fecal Blautia, Fusobacterium, Turicibacter, Clostridium hiranonis, and Faecalibacterium abundances, and increased fecal Streptococcus and Escherichia coli abundances. DNA sequencing analysis demonstrated that metronidazole reduced microbial alpha diversity and influenced the relative abundance of 20 bacterial genera and families. Metronidazole also increased primary BA and reduced secondary BA concentrations. Most antibiotic-induced changes returned to baseline by week 8. Fecal scores were more stable (P = 0.01) in GNU100-fed dogs than controls after antibiotic administration. GNU100 also influenced fecal microbiota and BA profiles, reducing (P < 0.05) the influence of metronidazole on microbial alpha diversity and returning some fecal microbiota and secondary BA to baseline levels at a quicker (P < 0.05) rate than controls. In conclusion, our results suggest that GNU100 supplementation provides benefits to dogs treated with antibiotics, providing more stable fecal scores, maintaining microbial diversity, and allowing for quicker recovery of microbiota and secondary BA profiles which play an essential role in gut health.
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Affiliation(s)
- Sara E Belchik
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Patricia M Oba
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Romain Wyss
- Gnubiotics Sciences, Route de la Corniche 6, Epalinges, Switzerland
| | - Paul T Asare
- Gnubiotics Sciences, Route de la Corniche 6, Epalinges, Switzerland
| | - Sara Vidal
- Gnubiotics Sciences, Route de la Corniche 6, Epalinges, Switzerland
| | - Yong Miao
- Gnubiotics Sciences, Route de la Corniche 6, Epalinges, Switzerland
| | - Yemi Adesokan
- Gnubiotics Sciences, Route de la Corniche 6, Epalinges, Switzerland
| | - Jan S Suchodolski
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, Texas A&M University, College Station, TX, USA
| | - Kelly S Swanson
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
- Division of Nutritional Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
- Department of Veterinary Clinical Medicine, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
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Zokhtareh R, Rahimnejad M, Najafpour-Darzi G, Karimi-Maleh H. A novel sensing platform for electrochemical detection of metronidazole antibiotic based on green-synthesized magnetic Fe 3O 4 nanoparticles. Environ Res 2023; 216:114643. [PMID: 36341789 DOI: 10.1016/j.envres.2022.114643] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [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: 07/13/2022] [Revised: 10/02/2022] [Accepted: 10/20/2022] [Indexed: 06/16/2023]
Abstract
The spread of antibiotic resistant genes has become a serious global concern. Thus, the development of efficient antibiotic monitoring systems to reduce their environmental risks is of great importance. Here, a potent electrochemical sensor was fabricated to detect metronidazole (MNZ) on the basis of green synthesis of Fe3O4 nanoparticles (NPs) using Sambucus ebulus L. leaves alcoholic plant extract as a safe and impressive reducing and stabilizing agent. Several analyses such as X-ray diffraction (XRD), Fourier transform infrared spectrophotometer (FTIR), thermogravimetric analysis (TGA), field emission scanning electron microscope (FESEM), energy dispersive X-ray spectroscopy (EDX), and dynamic light scattering (DLS) confirmed the production of homogeneous, monodisperse, regular, and stable magnetite NPs with a spherical morphology. The as-prepared Fe3O4NPs were afterwards applied to evaluate the electrochemical activity of MNZ by merging them with graphene nanosheets (GR NSs) on the glassy carbon electrode (GCE). The GR/Fe3O4NPs/GCE represented extraordinary catalytic activity toward MNZ with two dynamic ranges of 0.05-5 μM and 5-120 μM, limit of detection (LOD) of 0.23 nM, limit of quantification (LOQ) of 0.76 nM, and sensitivity of 7.34 μA μM-1 cm-2. The fabricated sensor was further employed as a practical tool for electrochemical detection of MNZ in real aqueous samples.
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Affiliation(s)
- Rosan Zokhtareh
- Biofuel and Renewable Energy Research Center, Department of Biotechnology, Faculty of Chemical Engineering, Babol Noshirvani University of Technology, Babol, Iran
| | - Mostafa Rahimnejad
- Biofuel and Renewable Energy Research Center, Department of Biotechnology, Faculty of Chemical Engineering, Babol Noshirvani University of Technology, Babol, Iran.
| | - Ghasem Najafpour-Darzi
- Biotechnology Research Laboratory, Department of Biotechnology, Faculty of Chemical Engineering, Babol Noshirvani University of Technology, Babol, Iran
| | - Hassan Karimi-Maleh
- School of Resources and Environment, University of Electronic Science and Technology of China, P.O. Box 611731, Xiyuan Ave, Chengdu, PR China; Department of Chemical Engineering, Quchan University of Technology, Quchan, Iran; Department of Chemical Sciences, University of Johannesburg, Doornfontein Campus, 2028 Johannesburg, P.O. Box 17011, South Africa
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Zhao W, Zhang X, Cai Y, Zhao S, Wang S. Effects of metronidazole on mesophilic and thermophilic fermentation: Biodegradation mechanisms, microbial communities, and reversibility. Bioresour Technol 2022; 362:127795. [PMID: 35988858 DOI: 10.1016/j.biortech.2022.127795] [Citation(s) in RCA: 1] [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: 07/06/2022] [Revised: 08/12/2022] [Accepted: 08/13/2022] [Indexed: 06/15/2023]
Abstract
Metronidazole (MNZ), an antibiotic that is specifically used for the treatment of anaerobic infections, may inhibit anaerobic fermentation. This work was designed to understand the fate and effects of MNZ in mesophilic fermentation (MF) and thermophilic fermentation (TF), respectively. The results showed that the removal of MNZ mainly occurred via biodegradation, rather than adsorption, and that MNZ could be completely degraded by opening the imidazole ring. MFs were more strongly inhibited by MNZ than TFs. MNZ concentration increased from 0 to 25 mg/L, hydrogen yield (HY) decreased from 167.5 to 16.8 mL/g glucose (90.0% decrease), and butyrate yield almost completely disappeared in MFs, whereas in TFs, HY decreased only from 101.1 to 89.3 mL/g glucose (11.7% decrease), and ethanol yield increased by 39.8%. Illumina MiSeq sequencing analysis showed that MNZ reduced the abundance of hydrogen-producing bacteria. Furthermore, the inhibition of MNZ on anaerobic fermentation was reversible.
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Affiliation(s)
- Wenqian Zhao
- School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
| | - Xiaodong Zhang
- School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China.
| | - Yanpeng Cai
- Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds, Institute of Environmental and Ecological Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Shan Zhao
- School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
| | - Shuguang Wang
- School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
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Zhang X, Sun J, Zhao M. Enhanced metronidazole removal by binary-species photoelectrogenic biofilm of microaglae and anoxygenic phototrophic bacteria. J Environ Sci (China) 2022; 115:25-36. [PMID: 34969452 DOI: 10.1016/j.jes.2021.07.016] [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: 06/01/2021] [Revised: 07/14/2021] [Accepted: 07/14/2021] [Indexed: 06/14/2023]
Abstract
High efficient removal of antibiotics during nutriments recovery for biomass production poses a major technical challenge for photosynthetic microbial biofilm-based wastewater treatment since antibiotics are always co-exist with nutriments in wastewater and resist biodegradation due to their strong biotoxicity and recalcitrance. In this study, we make a first attempt to enhance metronidazole (MNZ) removal from wastewater using electrochemistry-activated binary-species photosynthetic biofilm of Rhodopseudomonas Palustris (R. Palustris) and Chlorella vulgaris (C. vulgaris) by cultivating them under different applied potentials. The results showed that application of external potentials of -0.3, 0 and 0.2 V led to 11, 33 and 26-fold acceleration in MNZ removal, respectively, as compared to that of potential free. The extent of enhancement in MNZ removal was positively correlated to the intensities of photosynthetic current produced under different externally applied potentials. The binary-species photoelectrogenic biofilm exhibited 18 and 6-fold higher MNZ removal rate than that of single-species of C. vulgaris and R. Palustris, respectively, due to the enhanced metabolic interaction between them. Application of an external potential of 0V significantly promoted the accumulation of tryptophan and tyrosine-like compounds as well as humic acid in extracellular polymeric substance, whose concentrations were 7.4, 7.1 and 2.0-fold higher than those produced at potential free, contributing to accelerated adsorption and reductive and photosensitive degradation of MNZ.
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Affiliation(s)
- Xubin Zhang
- Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Jian Sun
- Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China.
| | - Mengmeng Zhao
- Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
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Vasseghian Y, Dragoi EN, Almomani F, Le VT. Graphene-based materials for metronidazole degradation: A comprehensive review. Chemosphere 2022; 286:131727. [PMID: 34352554 DOI: 10.1016/j.chemosphere.2021.131727] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [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: 07/03/2021] [Revised: 07/21/2021] [Accepted: 07/28/2021] [Indexed: 06/13/2023]
Abstract
Due to its cytotoxic effect, metronidazole (MNZ) is a drug commonly used to treat bacterial, protozoal, and microaerophilic bacterial infections. After consumption, it undergoes a series of metamorphic reactions that lead to the degradation of oxidized, acetylated, and hydrolyzed metabolites in the environment. To eliminate such pollutants, due to their high potential, adsorption and photocatalysis extensive processes are used in which graphene can be used to improve efficiency. This review analyses the use of graphene as an absorbent and catalyst with a focus on absorption and photocatalytic degradation of MNZ by graphene-based materials (GBMs). The parameters affecting the adsorption, and photocatalytic degradation of MNZ are investigated and discussed. Besides, the basic mechanisms occurring in these processes are summarized and analyzed. This work provides a theoretical framework that can direct future research in the field of MNZ removal from aqueous solutions.
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Affiliation(s)
- Yasser Vasseghian
- Department of Chemical Engineering, Quchan University of Technology, Quchan, Iran.
| | - Elena-Niculina Dragoi
- Faculty of Chemical Engineering and Environmental Protection "Cristofor Simionescu", "Gheorghe Asachi" Technical University, Iasi, Bld Mangeron No 73, 700050, Romania.
| | - Fares Almomani
- Department of Chemical Engineering, College of Engineering, Qatar University, P. O. Box 2713, Doha, Qatar.
| | - Van Thuan Le
- Center for Advanced Chemistry, Institute of Research and Development, Duy Tan University, 03 Quang Trung, Da Nang 550000, Viet Nam; The Faculty of Environmental and Chemical Engineering, Duy Tan University, 03 Quang Trung, Da Nang 550000, Viet Nam.
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Lanyero H, Ocan M, Obua C, Stålsby Lundborg C, Agaba K, Kalyango JN, Eriksen J, Nanzigu S. Validity of caregivers' reports on prior use of antibacterials in children under five years presenting to health facilities in Gulu, northern Uganda. PLoS One 2021; 16:e0257328. [PMID: 34529730 PMCID: PMC8445424 DOI: 10.1371/journal.pone.0257328] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Accepted: 08/28/2021] [Indexed: 11/18/2022] Open
Abstract
INTRODUCTION Given the frequent initiation of antibacterial treatment at home by caregivers of children under five years in low-income countries, there is a need to find out whether caregivers' reports of prior antibacterial intake by their children before being brought to the healthcare facility are accurate. The aim of this study was to describe and validate caregivers' reported use of antibacterials by their children prior to seeking care at the healthcare facility. METHODS A cross sectional study was conducted among children under five years seeking care at healthcare facilities in Gulu district, northern Uganda. Using a researcher administered questionnaire, data were obtained from caregivers regarding reported prior antibacterial intake in their children. These reports were validated by comparing them to common antibacterial agents detected in blood and urine samples from the children using liquid chromatography with tandem mass spectrometry (LC-MS/MS) methods. RESULTS A total of 355 study participants had a complete set of data on prior antibacterial use collected using both self-report and LC-MS/MS. Of the caregivers, 14.4% (51/355, CI: 10.9-18.5%) reported giving children antibacterials prior to visiting the healthcare facility. However, LC-MS/MS detected antibacterials in blood and urine samples in 63.7% (226/355, CI: 58.4-68.7%) of the children. The most common antibacterials detected from the laboratory analysis were cotrimoxazole (29%, 103/355), ciprofloxacin (13%, 46/355), and metronidazole (9.9%, 35/355). The sensitivity, specificity, positive predictive value (PPV), negative predictive value and agreement of self-reported antibacterial intake prior to healthcare facility visit were 17.3% (12.6-22.8), 90.7% (84.3-95.1), 76.5% (62.5-87.2), 38.5% (33.0-44.2) and 43.9% (k 0.06) respectively. CONCLUSION There is low validity of caregivers' reports on prior intake of antibacterials by these children. There is need for further research to understand the factors associated with under reporting of prior antibacterial use.
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Affiliation(s)
- Hindum Lanyero
- Department of Pharmacology and Therapeutics, Makerere University College of Health Sciences, Kampala, Uganda
| | - Moses Ocan
- Department of Pharmacology and Therapeutics, Makerere University College of Health Sciences, Kampala, Uganda
| | - Celestino Obua
- Mbarara University of Science and Technology, Mbarara, Uganda
| | | | | | - Joan N. Kalyango
- Department of Pharmacy, Makerere University College of Health Sciences, Kampala, Uganda
- Clinical Epidemiology Unit, Makerere University College of Health Sciences, Kampala, Uganda
| | - Jaran Eriksen
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
- Department of Infectious Diseases, South General Hospital, Stockholm, Sweden
| | - Sarah Nanzigu
- Department of Pharmacology and Therapeutics, Makerere University College of Health Sciences, Kampala, Uganda
- * E-mail:
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Martins PM, Salazar H, Aoudjit L, Gonçalves R, Zioui D, Fidalgo-Marijuan A, Costa CM, Ferdov S, Lanceros-Mendez S. Crystal morphology control of synthetic giniite for enhanced photo-Fenton activity against the emerging pollutant metronidazole. Chemosphere 2021; 262:128300. [PMID: 33182084 DOI: 10.1016/j.chemosphere.2020.128300] [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: 08/04/2020] [Revised: 09/07/2020] [Accepted: 09/08/2020] [Indexed: 06/11/2023]
Abstract
Metronidazole (MNZ) is a recalcitrant antibiotic with toxic and carcinogenic effects in aquatic environments. In this work, Fe5(PO4)4(OH)3·2H2O (giniite) particles were synthesised with three different alkaline cations (Li+, Na+ and K+) and used as Fenton catalysts for MNZ removal. It is shown that the addition of different cations during the hydrothermal synthesis process promote different morphologies from asterisk-like to flower-like and branches-like, maintaining the crystalline structure of pure giniite. The photo-Fenton activity of these particles was then evaluated through the degradation of MNZ under sunlight radiation for 9 h. The results indicate that the alkaline cation has a predominant role in the photo-Fenton efficiency, as demonstrated by the superior degradation efficiencies of Na@giniite particles (91.2% and 72.5% with giniite concentration of 0.2 g L-1 and 0.07 g L-1, respectively), related with its high surface area (10.7 m2 g-1). Thus, it is demonstrated the suitability of Na@giniite particles as Fenton catalyst for MNZ removal from water.
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Affiliation(s)
- P M Martins
- Centre/Department of Physics, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal; Centre/Department of Chemistry, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal; IB-S - Institute for Research and Innovation on Bio-Sustainability, University of Minho, 4710-057, Braga, Portugal.
| | - H Salazar
- Centre/Department of Physics, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal; Centre/Department of Chemistry, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal; IB-S - Institute for Research and Innovation on Bio-Sustainability, University of Minho, 4710-057, Braga, Portugal
| | - L Aoudjit
- Unité de Développement des équipements Solaires, UDES /Centre de Développement des Energies Renouvelables, CDER, Bou Ismail, 42415, W. Tipaza, Algeria
| | - R Gonçalves
- Centre/Department of Chemistry, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - D Zioui
- Unité de Développement des équipements Solaires, UDES /Centre de Développement des Energies Renouvelables, CDER, Bou Ismail, 42415, W. Tipaza, Algeria
| | - A Fidalgo-Marijuan
- BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940, Leioa, Spain
| | - C M Costa
- Centre/Department of Physics, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal; Centre/Department of Chemistry, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - S Ferdov
- Centre/Department of Physics, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - S Lanceros-Mendez
- BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940, Leioa, Spain; IKERBASQUE, Basque Foundation for Science, 48013, Bilbao, Spain.
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12
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Ali OT, Hassan WS, Khayyat AN, Almalki AJ, Sebaiy MM. HPLC Determination of Imidazoles with Variant Anti-Infective Activity in Their Dosage Forms and Human Plasma. Molecules 2020; 26:molecules26010129. [PMID: 33396585 PMCID: PMC7794769 DOI: 10.3390/molecules26010129] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 12/18/2020] [Accepted: 12/23/2020] [Indexed: 11/16/2022] Open
Abstract
A suitable HPLC method has been selected and validated for rapid simultaneous separation and determination of four imidazole anti-infective drugs, secnidazole, omeprazole, albendazole, and fenbendazole, in their final dosage forms, in addition to human plasma within 5 min. The method suitability was derived from the superiority of using the environmentally benign solvent, methanol over acetonitrile as a mobile phase component in respect of safety issues and migration times. Separation of the four anti-infective drugs was performed on a Thermo Scientific® BDS Hypersil C8 column (5 µm, 2.50 × 4.60 mm) using a mobile phase consist of MeOH: 0.025 M KH2PO4 (70:30, v/v) adjusted to pH 3.20 with ortho-phosphoric acid at room temperature. The flow rate was 1.00 mL/min and maximum absorption was measured with UV detector set at 300 nm. Limits of detection were reported to be 0.41, 0.13, 0.18, and 0.15 µg/mL for secnidazole, omeprazole, albendazole, and fenbendazole, respectively, showing a high degree of the method sensitivity. The method of analysis was validated according to Food and Drug Administration (FDA)guidelines for the determination of the drugs, either in their dosage forms with highly precise recoveries, or clinically in human plasma, especially regarding pharmacokinetic and bioequivalence studies.
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Affiliation(s)
- Oday T. Ali
- Department of Chemistry, Faculty of Science, Zagazig University, 44519 Zagazig, Egypt;
- Ministry of Education, Baghdad 55509, Iraq
| | - Wafaa S. Hassan
- Department of Analytical Chemistry, Faculty of Pharmacy, Zagazig University, 44519 Zagazig, Egypt;
| | - Ahdab N. Khayyat
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (A.N.K.); (A.J.A.)
| | - Ahmad J. Almalki
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (A.N.K.); (A.J.A.)
| | - Mahmoud M. Sebaiy
- Department of Medicinal Chemistry, Faculty of Pharmacy, Zagazig University, 44519 Zagazig, Egypt
- Correspondence: or ; Tel.: +20-10-6278-0060; Fax: +20-55-230-3266
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13
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Dawit M, Turbale M, Moges A, Amare M. Poly(alizarin red S) modified glassy carbon electrode for square wave adsorptive stripping voltammetric determination of metronidazole in tablet formulation. PLoS One 2020; 15:e0244115. [PMID: 33351825 PMCID: PMC7755201 DOI: 10.1371/journal.pone.0244115] [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] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Accepted: 12/03/2020] [Indexed: 12/02/2022] Open
Abstract
Potentiodynamically fabricated poly(alizarin red s) modified GCE was characterized using CV and EIS techniques. In contrast to the cyclic voltammetric response of the unmodified GCE for metronidazole, an irreversible reduction peak with three-folds of current enhancement and reduced overpotential at the poly(alizarin red s) modified GCE showed the catalytic effect of the modifier towards reduction of metronidazole. While observed peak potential shift with increasing pH (4.0-10.0) indicated the involvement of protons during the reduction of metronidazole, peak potential shift with scan rate (20-300 mV s-1) confirmed the irreversibility of the reduction reaction of metronidazole at the modified GCE. A better correlation for the dependence of peak current on scan rate (r2 = 0.9883) than on square root of scan rate (r2 = 0.9740) supplemented by slope value of 0.38 for plot of log(current) versus log(scan rate) indicated the reduction reaction of metronidazole at the surface of the modified electrode was predominantly adsorption controlled. Under the optimized method and solution parameters, reductive current response of tablet sample showed linear dependence on spiked standard concentration in a wide range (0-125 μM) with excellent determination coefficient r2, LoD and LoQ of 0.9991, 0.38, and 1.25 μM, respectively. Spike recovery of 97.9% and interference recovery of 96.2-97.5% in the presence of 21.28 and 31.92 μM of uric acid and ascorbic acid validated the applicability of the present method for determination of metronidazole in tablet formulation. The metronidazole content of the tested tablet formulation using standard addition method was found to be 97.6% of what is claimed by the tablet manufacturer making the developed method an excellent potential candidate for its applicability to determine metronidazole in real samples with complex matrix.
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14
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Baikeli Y, Mamat X, He F, Xin X, Li Y, Aisa HA, Hu G. Electrochemical determination of chloramphenicol and metronidazole by using a glassy carbon electrode modified with iron, nitrogen co-doped nanoporous carbon derived from a metal-organic framework (type Fe/ZIF-8). Ecotoxicol Environ Saf 2020; 204:111066. [PMID: 32781344 DOI: 10.1016/j.ecoenv.2020.111066] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [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: 04/10/2020] [Revised: 07/20/2020] [Accepted: 07/22/2020] [Indexed: 05/02/2023]
Abstract
In this study, an iron-doped metal-organic framework (MOF) Fe/ZIF-8 was synthesized from ZIF-8 at room temperature. Direct carbonization of Fe/ZIF-8 under a nitrogen atmosphere produced nanoporous nitrogen doped carbon nanoparticles decorated with Fe component (Fe/NC). The Fe/NC exhibited a large surface area (1221.185 m2 g-1) and narrow pore-size distribution (3-5 nm). The nanoporous Fe/NC components along with Nafion were used to modify a glassy carbon electrode for the electrochemical determination of chloramphenicol and metronidazole via linear sweep voltammetry. Under optimal conditions, the reduction peak currents (observed at -0.237 V and -0.071 V vs. Ag/AgCl) of these analytes increased linearly with increasing chloramphenicol and metronidazole concentrations in the range of 0.1-100 μM and 0.5-30 μM, with the detection limits estimated to be 31 nM and 165 nM, respectively. This result was attributed to the large surface area, porous structure, high nitrogen content, and as well as the electrocatalytic effect of Fe atoms embeded in the carbon support. The proposed sensor was used for chloramphenicol and metronidazole analysis in samples, providing satisfactory results.
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Affiliation(s)
- Yiliyasi Baikeli
- Key Laboratory of Chemistry of Plant Resources in Arid Regions, State Key Laboratory Basis of Xinjiang Indigenous Medicinal Plants Resource Utilization, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi, 830011, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xamxikamar Mamat
- Key Laboratory of Chemistry of Plant Resources in Arid Regions, State Key Laboratory Basis of Xinjiang Indigenous Medicinal Plants Resource Utilization, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi, 830011, China
| | - Fei He
- Key Laboratory of Chemistry of Plant Resources in Arid Regions, State Key Laboratory Basis of Xinjiang Indigenous Medicinal Plants Resource Utilization, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi, 830011, China
| | - Xuelei Xin
- Key Laboratory of Chemistry of Plant Resources in Arid Regions, State Key Laboratory Basis of Xinjiang Indigenous Medicinal Plants Resource Utilization, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi, 830011, China
| | - Yongtao Li
- Key Laboratory of Chemistry of Plant Resources in Arid Regions, State Key Laboratory Basis of Xinjiang Indigenous Medicinal Plants Resource Utilization, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi, 830011, China
| | - Haji Akbar Aisa
- Key Laboratory of Chemistry of Plant Resources in Arid Regions, State Key Laboratory Basis of Xinjiang Indigenous Medicinal Plants Resource Utilization, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi, 830011, China.
| | - Guangzhi Hu
- Key Laboratory of Chemistry of Plant Resources in Arid Regions, State Key Laboratory Basis of Xinjiang Indigenous Medicinal Plants Resource Utilization, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi, 830011, China; Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science,Yunnan University, Kunming, 650504, China.
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15
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Ren G, Hou X, Kang Y, Zhang R, Zhang M, Liu W, Li L, Wei S, Wang H, Wang B, Diao H. Efficient preparation of nitrogen-doped fluorescent carbon dots for highly sensitive detection of metronidazole and live cell imaging. Spectrochim Acta A Mol Biomol Spectrosc 2020; 234:118251. [PMID: 32193157 DOI: 10.1016/j.saa.2020.118251] [Citation(s) in RCA: 19] [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: 12/26/2019] [Revised: 03/10/2020] [Accepted: 03/10/2020] [Indexed: 06/10/2023]
Abstract
Herein, nitrogen-doped carbon dots (N-CDs) emitting blue fluorescence were prepared using L-tartaric acid and triethylenetetramine through a simple and quick microwave-assisted method. The synthesized N-CDs displayed excitation-dependent fluorescence behavior, and their maximum excitation and emission wavelengths were 350 and 425 nm, respectively. The obtained N-CDs, which featured excellent fluorescence properties with a high fluorescence quantum yield of 31%, were applied to detect metronidazole (MNZ), which can effectively quench the fluorescence intensity of N-CDs due to the inner filter effect. This phenomenon was used as basis to develop a label-free fluorescent method for rapid MNZ determination, with the limit of detection of 0.22 μM and corresponding linear range of 0.5-22 μM. Hence, we had established a fluorescence method for MNZ detection and applied it to detect MNZ in real samples with satisfactory results. Finally, N-CDs with superior biocompatibility were applied for cell imaging and MNZ detection by the changes in fluorescence intensity.
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Affiliation(s)
- Guodong Ren
- Department of Biochemistry and Molecular Biology, Shanxi Medical University, Taiyuan 030001, China
| | - Xiaoyu Hou
- Department of Biochemistry and Molecular Biology, Shanxi Medical University, Taiyuan 030001, China
| | - Yu Kang
- Department of Biochemistry and Molecular Biology, Shanxi Medical University, Taiyuan 030001, China
| | - Rong Zhang
- Department of Biochemistry and Molecular Biology, Shanxi Medical University, Taiyuan 030001, China
| | - Min Zhang
- Department of Biochemistry and Molecular Biology, Shanxi Medical University, Taiyuan 030001, China
| | - Wen Liu
- Department of Chemistry, Shanxi Medical University, Taiyuan 030001, China.
| | - Lihong Li
- Department of Chemistry, Shanxi Medical University, Taiyuan 030001, China.
| | - Shuangyan Wei
- Shanxi Provincial People's Hospital, Taiyuan 030012, China
| | - Haojiang Wang
- Department of Chemistry, Shanxi Medical University, Taiyuan 030001, China
| | - Bin Wang
- Department of Chemistry, Shanxi Medical University, Taiyuan 030001, China
| | - Haipeng Diao
- Department of Biochemistry and Molecular Biology, Shanxi Medical University, Taiyuan 030001, China; Department of Chemistry, Shanxi Medical University, Taiyuan 030001, China.
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16
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Orooji Y, Haddad Irani-Nezhad M, Hassandoost R, Khataee A, Rahim Pouran S, Joo SW. Cerium doped magnetite nanoparticles for highly sensitive detection of metronidazole via chemiluminescence assay. Spectrochim Acta A Mol Biomol Spectrosc 2020; 234:118272. [PMID: 32229321 DOI: 10.1016/j.saa.2020.118272] [Citation(s) in RCA: 71] [Impact Index Per Article: 17.8] [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: 01/28/2020] [Revised: 03/14/2020] [Accepted: 03/15/2020] [Indexed: 06/10/2023]
Abstract
Cerium doped magnetite nanoparticle (CDM) was synthesized via a co-precipitation method and used as the co-reactant of luminol-K3Fe(CN)6 chemiluminescent system. The physical-chemical features of CDM were studied by XPS, XRD, HRTEM, FESEM, VSM, BET, and FTIR analyses. This simple and highly sensitive nanoprobe enabled the determination of minor concentrations of metronidazole (MNZ). Owing to the quenching efficacy of MNZ in the studied chemiluminescence system, a linear range of 3.47 × 10-6-9.37 × 10-5 mol/L was obtained with a limit of detection of 3.91 × 10-7 mol/L. This biosensor was used for MNZ detection in human serum samples, which was highly efficient. The outcomes of this study give credit to the proposed biosensor to be applied for detection of MNZ in biological samples.
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Affiliation(s)
- Yasin Orooji
- College of Materials Science and Engineering, Nanjing Forestry University, No. 159, Longpan Road, Nanjing, 210037, Jiangsu, People's Republic of China; Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China
| | - Mahsa Haddad Irani-Nezhad
- Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, 51666-16471 Tabriz, Iran
| | - Ramin Hassandoost
- Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, 51666-16471 Tabriz, Iran
| | - Alireza Khataee
- Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, 51666-16471 Tabriz, Iran; Department of Environmental Engineering, Gebze Technical University, 41400 Gebze, Turkey; Institute of Research and Development, Duy Tan University, Da Nang 550000, Viet Nam.
| | - Shima Rahim Pouran
- Department of Biology, Faculty of Science, University of Mohaghegh Ardabili, P.O. Box 179, Ardabil, Iran
| | - Sang Woo Joo
- School of Mechanical Engineering, Yeungnam University, Gyeongsan 712-749, South Korea.
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17
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Wang X, Zhang S, Zhao B. Determination of ultra trace amounts of metronidazole by 3-phenyl-N-[4-(10,15,20-triphenyl-porphyrin-5-yl)-phenyl]- acrylamide as the fluorescence spectral probe in CTAB microemulsion. Spectrochim Acta A Mol Biomol Spectrosc 2020; 227:117699. [PMID: 31685423 DOI: 10.1016/j.saa.2019.117699] [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: 05/30/2019] [Revised: 10/19/2019] [Accepted: 10/24/2019] [Indexed: 06/10/2023]
Abstract
In this work, 3-Phenyl-N-[4-(10,15,20-triphenyl-porphyrin-5-yl)-phenyl]- acrylamide (TPPCA) was synthesized for the determination of metronidazole (MTZ). It was found that the type of fluorescence quenching was static quenching determined by Stern-Volmer plot and UV absorption spectroscopy, and thermodynamic related parameters were also obtained. Furthermore, the corresponding measurement conditions: the acidity of the system, the type of surfactant, the concentration of TPPCA and the sequence of reagent addition were optimized. Under the optimal experimental conditions, the linear range of MTZ was determined to be 0.01-0.20 μg mL-1, and the limit of detection (LOD) was 0.004 μg mL-1. Importantly, this report provides a simple, fast, and sensitive probe for the determination of MTZ in pharmaceutical practice.
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Affiliation(s)
- Xiang Wang
- School of Chemistry and Chemical Engineering, Tiangong University, Tianjin, 300387, PR China; Tianjin Polytechnic University State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin, 300387, PR China
| | - Shengkang Zhang
- School of Chemistry and Chemical Engineering, Tiangong University, Tianjin, 300387, PR China
| | - Baojuan Zhao
- School of Chemistry and Chemical Engineering, Tiangong University, Tianjin, 300387, PR China; Tianjin Polytechnic University State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin, 300387, PR China.
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18
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Hena S, Gutierrez L, Croué JP. Removal of metronidazole from aqueous media by C. vulgaris. J Hazard Mater 2020; 384:121400. [PMID: 31624001 DOI: 10.1016/j.jhazmat.2019.121400] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [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: 07/26/2019] [Revised: 09/22/2019] [Accepted: 10/04/2019] [Indexed: 06/10/2023]
Abstract
This current study investigated the removal of metronidazole from aqueous media by C. vulgaris. Two different initial sizes of inoculum (0.05 and 0.5 g L-1) were tested for a wide concentration range of metronidazole (1-50 μM). The effect of metronidazole concentrations on biomass production was studied for 20 days. The exopolymeric substances (EPS) were quantified and correlated with the removal of antibiotics from aqueous media. Specifically, MDZ stimulated the production of EPS in C. vulgaris, which played the major role in the adsorption of this antibiotic. Also, metronidazole significantly influenced the zeta potential of C. vulgaris in the test cultures, indicating a change in surface characteristics. This decrease in surface negative charge caused auto-flocculation phenomena at a stationary phase. Chronic and acute toxicity experiments showed that metronidazole was harmful to C. vulgaris at stationary phase. Results from this study would advance our knowledge on the treatment of metronidazole-contaminated waters with C. vulgaris as a green technology-oriented process.
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Affiliation(s)
- Sufia Hena
- Curtin Water Quality Research Centre, Department of Chemistry, Curtin University, Australia
| | - Leo Gutierrez
- Facultad del Mar y Medio Ambiente, Universidad del Pacifico, Ecuador
| | - Jean-Philippe Croué
- Curtin Water Quality Research Centre, Department of Chemistry, Curtin University, Australia; Institut de Chimie des Milieux et des Matériaux IC2MP UMR 7285 CNRS, Université de Poitiers, France.
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Yoon J, Kang SW, Shim WS, Lee JK, Jang DK, Gu N, Kim SK, Lee KT, Chung EK. Quantification of metronidazole in human bile fluid and plasma by liquid chromatography-tandem mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2019; 1138:121959. [PMID: 31911204 DOI: 10.1016/j.jchromb.2019.121959] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Revised: 12/19/2019] [Accepted: 12/23/2019] [Indexed: 12/07/2022]
Abstract
This study was conducted to develop a highly selective, sensitive, and validated method for quantifying metronidazole in human plasma and bile fluid. Metronidazole and metronidazole-d4 (internal standard) were extracted from 100 μL of plasma and bile fluid by liquid-liquid extraction. Liquid chromatography with a Hydrosphere C18 column (50 × 2.0 mm) was performed using 10 mM ammonium formate (pH 4.0) and acetonitrile (20:80, v/v) as the mobile phase. Triple quadrupole mass spectrometry was operated with an electrospray ionization interface in multiple reaction monitoring and positive ion modes. The calibration curves were linear for bile and plasma samples over the range of 50-20,000 ng/mL (r2 > 0.999). The intra- and inter-day coefficients of variation (CVs) for plasma ranged from 2.50% to 7.85% and 3.11% to 16.9%, respectively; for bile, the intra-and inter-run precision (CVs) ranged from 2.76% to 13.2% and 3.16% to 11.5%, respectively. The mean extraction recovery for metronidazole ranged from 76.5% to 82.1% in plasma and from 78.8% to 87.8% in bile, respectively. Our proposed analytical method was successfully applied to determine metronidazole concentrations in bile as well as in plasma at multiple time points in a patient with acute cholangitis.
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Affiliation(s)
- Jimin Yoon
- Department of Pharmacy College of Pharmacy, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, South Korea; Department of Pharmacy, Kyung Hee University Hospital at Gangdong, 892 Dongnam-ro, Gangdong-gu, Seoul 05278, South Korea
| | - Sung Wook Kang
- Department of Pulmonary and Critical Care Medicine, Kyung Hee University Hospital at Gangdong, 892 Dongnam-ro, Gangdong-gu, Seoul 05278, South Korea
| | - Wang-Seob Shim
- Kyung Hee Drug Analysis Center, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, South Korea
| | - Jun Kyu Lee
- Department of Internal Medicine, Dongguk University Ilsan Hospital, 27 Dongguk-ro, Ilsandong-gu, Goyang, Gyeonggi-do 10326, South Korea
| | - Dong Kee Jang
- Department of Internal Medicine, Dongguk University Ilsan Hospital, 27 Dongguk-ro, Ilsandong-gu, Goyang, Gyeonggi-do 10326, South Korea
| | - Namyi Gu
- Department of Internal Medicine, Dongguk University Ilsan Hospital, 27 Dongguk-ro, Ilsandong-gu, Goyang, Gyeonggi-do 10326, South Korea; Department of Clinical Pharmacology and Therapeutics, Dongguk University Clinical Trial Center, 27 Dongguk-ro, Ilsandong-gu, Goyang, Gyeonggi-do 10326, South Korea
| | - Sae Kyul Kim
- Kyung Hee Drug Analysis Center, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, South Korea; Department of Pharmaceutical Biochemistry, College of Pharmacy, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, South Korea
| | - Kyung-Tae Lee
- Kyung Hee Drug Analysis Center, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, South Korea; Department of Pharmaceutical Biochemistry, College of Pharmacy, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, South Korea.
| | - Eun Kyoung Chung
- Department of Pharmacy College of Pharmacy, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, South Korea; Department of Pharmacy, Kyung Hee University Hospital at Gangdong, 892 Dongnam-ro, Gangdong-gu, Seoul 05278, South Korea.
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20
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Segovia-Sandoval SJ, Padilla-Ortega E, Carrasco-Marín F, Berber-Mendoza MS, Ocampo-Pérez R. Simultaneous removal of metronidazole and Pb(II) from aqueous solution onto bifunctional activated carbons. Environ Sci Pollut Res Int 2019; 26:25916-25931. [PMID: 31273660 DOI: 10.1007/s11356-019-05857-w] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Accepted: 06/25/2019] [Indexed: 06/09/2023]
Abstract
In this work, it was analyzed the behavior of three commercial activated carbons with different textural and chemical properties to adsorb individually metronidazole and lead ions from aqueous solution. Afterwards, the activated carbons were modified with citric acid to remove both compounds simultaneously. Both sets of activated carbons were characterized chemically and texturally. XPS analysis was performed to corroborate the adsorption mechanism of lead on the surface of the carbons. Finally, the intraparticle diffusion of both adsorbates was elucidated by the application of diffusional model in three dimensions. The results evidenced that adsorption mechanism for MNZ and Pb(II) is independent, the adsorption for MNZ is governed by π-π dispersive interactions, whereas Pb(II) adsorption is mainly controlled by electrostatic interactions. The binary adsorption equilibrium shows that the adsorption of MNZ is independent from the concentration of Pb(II), whereas the adsorption of Pb(II) is affected by the presence of MNZ at low concentrations (0.1 mmol L-1), but it remains almost constant at concentrations of MNZ between 0.1 and 1.5 mmol L-1. Finally, the mass transport of MNZ was faster than Pb(II) from the solution to the external surface of activated carbon and the mass flux of MNZ inside the particle was superior to the mass flux of Pb(II). Lastly, there might be an obstruction phenomenon with MNZ impeding Pb(II) to reach the active sites placed into the carbon's microporosity structure. Graphical abstract.
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Affiliation(s)
- Sonia Judith Segovia-Sandoval
- Centro de Investigación y Estudios de Posgrado, Facultad de Ingeniería, Universidad Autónoma de San Luis Potosí, Av. Dr. Manuel Nava 6, Zona Universitaria, 78210, San Luis Potosí, SLP, Mexico
| | - Erika Padilla-Ortega
- Centro de Investigación y Estudios de Posgrado, Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, Av. Dr. Manuel Nava 6, Zona Universitaria, 78210, San Luis Potosí, SLP, Mexico
| | - Francisco Carrasco-Marín
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Granada, Av. Fuente Nueva, 18071, Granada, Spain
| | - María Selene Berber-Mendoza
- Centro de Investigación y Estudios de Posgrado, Facultad de Ingeniería, Universidad Autónoma de San Luis Potosí, Av. Dr. Manuel Nava 6, Zona Universitaria, 78210, San Luis Potosí, SLP, Mexico
| | - Raúl Ocampo-Pérez
- Centro de Investigación y Estudios de Posgrado, Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, Av. Dr. Manuel Nava 6, Zona Universitaria, 78210, San Luis Potosí, SLP, Mexico.
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Pan Y, Li X, Fu K, Deng H, Shi J. Degradation of metronidazole by UV/chlorine treatment: Efficiency, mechanism, pathways and DBPs formation. Chemosphere 2019; 224:228-236. [PMID: 30822729 DOI: 10.1016/j.chemosphere.2019.02.081] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Revised: 01/18/2019] [Accepted: 02/13/2019] [Indexed: 05/28/2023]
Abstract
Metronidazole (MET) is a widely used antibiotic but is recalcitrant in aquatic environment. This study investigated elimination of MET by UV/chlorine process systematically. The degradation of MET in the process well fitted pseudo first-order kinetics. Decreasing pH from 9 to 5 raised the rate constant from 0.0199 min-1 to 0.1485 min-1, possibly ascribed to change in species distribution and apparent quantum yields of radicals. Scavenging experiments indicated that both HO and Cl contributed to the degradation of MET, and that HO was the dominant species in the pH range studied. The second-order rate constant between Cl and MET was determined to be (5.64 ± 0.1) × 109 M-1 s-1. Three products were identified by UPLC-Q-TOF MS and degradation pathway was thus proposed. Significant amounts of chlorinated disinfection by-products (DBPs) were produced and 1,1,1-TCP was the dominant (83.6%-92.3%) in the UV/chlorine process. The kinetic model developed fitted well with experimental results, and was used to examine the effects of typical water parameters, such as chorine dosage, pH, inorganic anions, NOM and real water matrix. Furthermore, removal efficiency of MET by the UV/chlorine process were assessed in terms of electrical energy per order (EE/O). The efficiency was about 0.43 kWh m-3 order-1, 0.54 kWh m-3 order-1, 0.57 kWh m-3 order-1, respectively, for the removal of MET in ultrapure water (UPW) and two types of real water samples, indicating that UV/chorine was a practical method for authentic drinking water treatment practices.
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Affiliation(s)
- Yishuai Pan
- Key Laboratory of Yangtze River Water Environment, Ministry of Education, Shanghai Institute of Pollution Control and Ecological Security, College of Environmental Science and Engineering, Tongji University, Shanghai, 20092, China
| | - Xuchun Li
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310018, China
| | - Kun Fu
- Key Laboratory of Yangtze River Water Environment, Ministry of Education, Shanghai Institute of Pollution Control and Ecological Security, College of Environmental Science and Engineering, Tongji University, Shanghai, 20092, China
| | - Huiping Deng
- Key Laboratory of Yangtze River Water Environment, Ministry of Education, Shanghai Institute of Pollution Control and Ecological Security, College of Environmental Science and Engineering, Tongji University, Shanghai, 20092, China.
| | - Jun Shi
- Key Laboratory of Yangtze River Water Environment, Ministry of Education, Shanghai Institute of Pollution Control and Ecological Security, College of Environmental Science and Engineering, Tongji University, Shanghai, 20092, China.
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Tran ML, Fu CC, Juang RS. Removal of metronidazole and amoxicillin mixtures by UV/TiO 2 photocatalysis: an insight into degradation pathways and performance improvement. Environ Sci Pollut Res Int 2019; 26:11846-11855. [PMID: 30820920 DOI: 10.1007/s11356-019-04683-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [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: 11/01/2018] [Accepted: 02/22/2019] [Indexed: 06/09/2023]
Abstract
The degradation efficiencies and pathways of metronidazole (MNZ) and amoxicillin (AMX) in binary mixtures by UV/TiO2 photocatalysis were studied. The presence of AMX significantly decreased the degradation of MNZ, whereas the existence of MNZ slightly reduced the degradation of AMX. This is basically due to the difference in attack ability of oxidizing agents present during TiO2 photocatalysis. All oxidizing agents (hydroxyl radicals, superoxide radicals, and holes) could attack AMX molecules, but hydroxyl radicals showed insignificant attack ability in MNZ degradation. In TiO2 photocatalysis of binary mixture, six transformation products were recognized by a high-resolution LC-QTof/MS. Because of competitive effect, only one product was sourced from MNZ degradation and four others were formed due to AMX degradation. The remaining one was a new product of the side reaction. This work indicated that the molecular structure of AMX determined its preferred degradation in a mixture. It not only affected the removal of antibiotics but also figured out the appearance of transformation products. In contrast to single systems, the extent of degradation reduced for each antibiotic in the presence of the second antibiotic was related to the availability of degradation pathways of each antibiotic. Moreover, suitable pH programming was applied to enhance the mineralization of the mixtures.
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Affiliation(s)
- Mai Lien Tran
- Department of Chemical and Materials Engineering, Chang Gung University, 259 Wenhua First Road, Guishan, Taoyuan, 33302, Taiwan
- Institute of Environmental Science, Engineering and Management, Industrial University of Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Chun-Chieh Fu
- Department of Chemical and Materials Engineering, Chang Gung University, 259 Wenhua First Road, Guishan, Taoyuan, 33302, Taiwan
| | - Ruey-Shin Juang
- Department of Chemical and Materials Engineering, Chang Gung University, 259 Wenhua First Road, Guishan, Taoyuan, 33302, Taiwan.
- Division of Nephrology, Department of Internal Medicine, Chang Gung Memorial Hospital, Linkou, Taiwan.
- Department of Safety, Health and Environmental Engineering, Ming Chi University of Technology, Taishan, New Taipei City, 24301, Taiwan.
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Kokulnathan T, Chen SM. Praseodymium Vanadate-Decorated Sulfur-Doped Carbon Nitride Hybrid Nanocomposite: The Role of a Synergistic Electrocatalyst for the Detection of Metronidazole. ACS Appl Mater Interfaces 2019; 11:7893-7905. [PMID: 30681329 DOI: 10.1021/acsami.8b09204] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The construction of efficient and superior nanostructured materials for the precise determination of contaminants that are hazardous to the environment has gained significant attention by the scientific community. In this regard, we fabricated a nanocomposite consisting of praseodymium vanadate (PrVO4; PrV) anchored to sulfur-doped carbon nitride (PrV/SCN) and applied it to the electrochemical detection of the antibiotic drug metronidazole (MTZ). The structural and crystalline features of the as-prepared PrV/SCN nanocomposite were characterized by various analytical and spectroscopic methods. More distinctly, the PrV/SCN nanocomposite-modified glassy carbon electrode (GCE) exhibits an outstanding linear range (0.001-2444 μM), high sensitivity (1.386 μA/μM cm2), low detection limit (0.8 nM), good reproducibility, and strong anti-interference ability. Notably, the PrV/SCN sensor can determine MTZ in spiked urine and water samples with high recoveries, suggesting its feasibility for real-time applications. Our findings establish PrV/SCN as a robust and promising platform for electrochemical detection. This promotes innovative design for the synthesis of novel functional nanocomposites.
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Affiliation(s)
- Thangavelu Kokulnathan
- Electroanalysis and Bioelectrochemistry Lab, Department of Chemical Engineering and Biotechnology , National Taipei University of Technology , No. 1, Section 3, Chung-Hsiao East Road , Taipei 106 , Taiwan , ROC
| | - Shen-Ming Chen
- Electroanalysis and Bioelectrochemistry Lab, Department of Chemical Engineering and Biotechnology , National Taipei University of Technology , No. 1, Section 3, Chung-Hsiao East Road , Taipei 106 , Taiwan , ROC
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Fu DY, Xue YR, Guo Y, Qu Z, Li HW, Wu H, Wu Y. Strong red-emitting gold nanoclusters protected by glutathione S-transferase. Nanoscale 2018; 10:23141-23148. [PMID: 30515506 DOI: 10.1039/c8nr05691a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Glutathione S-transferase (GST) is distributed widely in tissues and has been proven to be vital in the body. For example, it catalyzes reduced glutathione (GSH) to a variety of electrophilic substances and thus protects cells against many toxic chemicals. Therefore, GST-related investigations have always been significant for medical and/or life sciences. In the present study, a new material of gold nanoclusters (Au-NCs) protected by GST, Au-NCs@GST, was fabricated via an improved one-step heating method. The products were fully characterized by X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), matrix-assisted laser desorption/ionization time of flight mass spectrometry (MALDI-TOF MS), and Fourier transform infrared (FT-IR) and circular dichroism (CD) spectra. The results confirmed that around 10 gold atoms are encapsulated in one intact GST, forming Au-NCs@GST with strong (QY = 13.5%) red emission at 670 nm. Therefore, a new nanomaterial possessing both strong luminescence and bio-functions of GST was developed, and it has great potential in GST-related investigations. To prove the concept, Au-NCs@GST was successfully applied to detect metronidazole (MNZ) both in solution and in living cells. Therefore, in the present study, we report not only a new nanomaterial of Au-NCs@GST but also a feasible fluorescence probe for antibiotic detection. Both the improved synthetic method and the design concept can be extended to the fabrication of other kinds of metal nanoclusters using different functional proteins for various purposes.
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Affiliation(s)
- Ding-Yi Fu
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University, No. 2699 Qianjin Street, Changchun 130012, China.
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Ahmadzadeh S, Dolatabadi M. Electrochemical treatment of pharmaceutical wastewater through electrosynthesis of iron hydroxides for practical removal of metronidazole. Chemosphere 2018; 212:533-539. [PMID: 30173107 DOI: 10.1016/j.chemosphere.2018.08.107] [Citation(s) in RCA: 18] [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: 06/08/2018] [Revised: 08/18/2018] [Accepted: 08/20/2018] [Indexed: 06/08/2023]
Abstract
Antibiotics as the severe contaminants of aqueous environments were received growing attention during the last decades. The current work is the first report on investigating the potency and efficiency of electrocoagulation process in the successful removal of metronidazole (MNZ) from pharmaceutical wastewater using response surface methodology based on central composite design. The applied method by optimizing the independent and combined effects of significant variables which affecting the EC process enhanced the removal efficiency of MNZ. Analysis of variance was applied to verify the significance of independent variables solely and their interactions. The best removal efficiency of 100% found under the optimal operating condition of initial MNZ concentration 21.6 mg L-1, pH 8.2, current density 6.0 mA cm-2, inter-electrode distance 3 cm, and reaction time of 14.6 min. Isotherm investigations revealed that the Langmuir model with the R2 of 0.994 best fitted to the obtained experimental equilibrium results. The fast adsorption of MNZ on the surface of Fe(OH)3 and [Fe(OH)2]+ with the equilibrium time of 15 min confirmed that the kinetics of the electrocoagulation process follow the pseudo-second-order model (R2 = 0.962). The electrocoagulation process under the optimal operating condition revealed that the electrical energy consumption per each m3 of treated pharmaceutical wastewater, per each g of MNZ, removed, and per each kg of Fe electrode consumed, were found to be 0.516 kWh m-3, 0.0234 kWh g-1, and 0.0436 kWh kg-1, respectively.
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Affiliation(s)
- Saeid Ahmadzadeh
- Pharmaceutics Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran.
| | - Maryam Dolatabadi
- Environmental Science and Technology Research Center, Department of Environmental Health Engineering, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
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Tran ML, Fu CC, Juang RS. Removal of metronidazole by TiO 2 and ZnO photocatalysis: a comprehensive comparison of process optimization and transformation products. Environ Sci Pollut Res Int 2018; 25:28285-28295. [PMID: 30078135 DOI: 10.1007/s11356-018-2848-7] [Citation(s) in RCA: 8] [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: 05/07/2018] [Accepted: 07/25/2018] [Indexed: 06/08/2023]
Abstract
The photodegradation of antibiotic metronidazole (MNZ) was systematically studied and compared by using aqueous suspensions of TiO2 and ZnO catalysts under 100-W UV irradiation. The degradation conditions were optimized using the central composite design and response surface methodology. The optimal photodegradation conditions obtained were at pH 6.0 with 1.5 g L-1 of TiO2 (86.10% removal for 50 mg L-1 MNZ) and at pH 9.5 with 0.5 g L-1 of ZnO (60.32% removal for 30 mg L-1 MNZ) after 60-min irradiation at 20 °C. The degradation efficiency in the presence of TiO2 was higher than that of ZnO. The participation of active species such as hydroxyl radicals (OH·), holes (h+), and superoxide radicals (O2-·) during MNZ photodegradation over TiO2 and ZnO catalysts was also examined. Experimental results showed that MNZ oxidation was mainly driven by the presence of holes and superoxide radicals. Totally, 10 major intermediates were detected in UV/TiO2 and UV/ZnO photocatalysis of MNZ using LC-QTof/MS system, in which 5 same intermediates were found. The remaining different intermediates led to the variations of degradation pathways of both processes. Moreover, some bigger transformation products than the parent MNZ were detected.
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Affiliation(s)
- Mai Lien Tran
- Department of Chemical and Materials Engineering, Chang Gung University, 259 Wenhua First Road, Guishan, Taoyuan, 33302, Taiwan
- Institute of Environmental Science, Engineering and Management, Industrial University of Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Chun-Chieh Fu
- Department of Chemical and Materials Engineering, Chang Gung University, 259 Wenhua First Road, Guishan, Taoyuan, 33302, Taiwan
| | - Ruey-Shin Juang
- Department of Chemical and Materials Engineering, Chang Gung University, 259 Wenhua First Road, Guishan, Taoyuan, 33302, Taiwan.
- Department of Internal Medicine, Division of Nephrology, Chang Gung Memorial Hospital, Linkou, Taiwan.
- Department of Safety, Health and Environmental Engineering, Ming Chi University of Technology, Taishan, New Taipei City, 24301, Taiwan.
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27
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Razzaq S, Hanif S, Syed MA, Iqbal J, Hassan SS, Raza SA, Riaz H, Abid F. Development and evaluation of mucoadhesive buccal tablet containing metronidazole for the treatment of periodontitis and gingivitis. Pak J Pharm Sci 2018; 31:1903-1910. [PMID: 30150187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The current study was designed to evaluate mucoadhesive buccal tablet containing metronidazole (MTZ) for local action aided by Hydroxypropylmethylcellulose K4M (HPMC) and Carbopol 940® (CP) as mucoadhesive polymers with other ingredients like sodium starch glycolate (SSG), polyvinyl pyrollidone K30 (PVP) as disintegrant and binders respectively. Formulations (F1-F8) were prepared by direct compression method and characterized for different physicochemical parameters. Results showed that the average weight and friability were within USP limits. Maximum mucoadhesive time was observed for F2 (14 hr) containing moderate amount of HPMC and CP used in the study. Up most mucoadhesive strength value was observed with F3 containing highest amount of HPMC used. Results indicated that high amount of HPMC was linked with the moderate to higher mucoadhesive strength and time. Maximum swelling index was observed in F7 (191.3%). Only F1-F3 showed complete in vitro MTZ release within 3 hr. Formulations containing PVP released MTZ incompletely over time while SSG released earlier. Formulation F1 was considered best in terms of MTZ release (100.5%) with diffusion based Korsmeyer-Peppas release kinetics. Therefore, MTZ exhibiting best physicochemical characters in mucoadhesive buccal tablet was found in F1 containing HPMC and CP in amounts of 37.5 mg and 25 mg, respectively, for local action.
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Affiliation(s)
- Sobia Razzaq
- Department of Pharmacy, The University of Lahore, Lahore, Pakistan
| | - Sana Hanif
- Department of Pharmacy, The University of Lahore, Lahore, Pakistan
| | | | - Javed Iqbal
- Department of Pharmacy, The University of Lahore, Lahore, Pakistan
| | | | - Syed Atif Raza
- University College of Pharmacy, University of The Punjab, Lahore, Pakistan
| | - Humayun Riaz
- Rashid Latif College of Pharmacy, Lahore, Pakistan
| | - Farah Abid
- Department of Pharmacy, The University of Lahore, Lahore, Pakistan
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28
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de León-Martínez LD, Rodríguez-Aguilar M, Ocampo-Pérez R, Gutiérrez-Hernández JM, Díaz-Barriga F, Batres-Esquivel L, Flores-Ramírez R. Synthesis and Evaluation of a Molecularly Imprinted Polymer for the Determination of Metronidazole in Water Samples. Bull Environ Contam Toxicol 2018; 100:395-401. [PMID: 29299634 DOI: 10.1007/s00128-017-2249-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [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: 07/28/2017] [Accepted: 12/09/2017] [Indexed: 05/14/2023]
Abstract
A molecularly imprinted polymer was developed and evaluated for selective determination of metronidazole (MNZ) in wastewater. This was achieved by using sodium methacrylate as monomer, toluene as porogen, ethylene glycol dimethacrylate as crosslinker, azobisisobutyronitrile as initiator and metronidazole as template molecule to generate the selectivity of the polymer for the compound, as well as non-imprinted polymers were synthesized. Two different polymerization approaches were used, bulk and emulsion and the polymers obtained by emulsion presented higher retention percentages the MIP 2-M presented the higher retention (83%). The performed method, was validated in fortified water, showing linearity from 10 up to 1000 ng/mL; limit of detection and quantification for compound were between 3 and 10 ng/mL, respectively. Finally, the method was applied in samples of a wastewater treatment plant in the city of San Luis Potosí, México, and the concentrations of MNZ in these samples were 84.1-114 ng/mL.
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Affiliation(s)
- L Díaz de León-Martínez
- Centro de Investigación Aplicada en Ambiente y Salud (CIAAS), Avenida Sierra Leona No. 550, CP 78210, Colonia Lomas Segunda Sección, San Luis Potosí, SLP, Mexico
| | - M Rodríguez-Aguilar
- Centro de Investigación Aplicada en Ambiente y Salud (CIAAS), Avenida Sierra Leona No. 550, CP 78210, Colonia Lomas Segunda Sección, San Luis Potosí, SLP, Mexico
| | - R Ocampo-Pérez
- Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, Avenida Sierra Leona No. 550, CP 78210, Colonia Lomas Segunda Sección, San Luis Potosí, SLP, Mexico
| | - J M Gutiérrez-Hernández
- Departamento de Madera, Papel y Celulosa, Centro Universitario de Ciencias Exactas e Ingenierías, Universidad de Guadalajara, Zapopan, Jalisco, Mexico
| | - F Díaz-Barriga
- Centro de Investigación Aplicada en Ambiente y Salud (CIAAS), Avenida Sierra Leona No. 550, CP 78210, Colonia Lomas Segunda Sección, San Luis Potosí, SLP, Mexico
| | - L Batres-Esquivel
- Centro de Investigación Aplicada en Ambiente y Salud (CIAAS), Avenida Sierra Leona No. 550, CP 78210, Colonia Lomas Segunda Sección, San Luis Potosí, SLP, Mexico
| | - R Flores-Ramírez
- CONACYT Research Fellow, Coordinación para la Innovación y Aplicación de la Ciencia y la Tecnología (CIACYT), Avenida Sierra Leona No. 550, CP 78210, Colonia Lomas Segunda Sección, San Luis Potosí, SLP, Mexico.
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Abstract
In a series of 20 patients undergoing elective colorectal surgery, 10 received an infusion of metronidazole 500 mg and 10 an infusion of 1500 mg commencing at the induction of anaesthesia. The concentrations of metronidazole in the plasma, rectus muscle and colon of the two groups during the course of the operation were compared. In those patients who received 1500 mg, the plasma and tissue concentrations were all well above the minimum inhibitory concentration (MIC) of metronidazole against Bacteroides fragilis. In those patients who received 500 mg, serum and tissue concentrations were at or only just above the MIC. It may be that 1500 mg would be a more effective dose of metronidazole for prophylactic use in colorectal surgery.
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30
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Pan H, Ba-Thein W. Diagnostic Accuracy of Global Pharma Health Fund Minilab™ in Assessing Pharmacopoeial Quality of Antimicrobials. Am J Trop Med Hyg 2018; 98:344-348. [PMID: 29141717 PMCID: PMC5928700 DOI: 10.4269/ajtmh.17-0289] [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] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2017] [Accepted: 09/26/2017] [Indexed: 02/05/2023] Open
Abstract
Global Pharma Health Fund (GPHF) Minilab™, a semi-quantitative thin-layer chromatography (TLC)-based commercially available test kit, is widely used in drug quality surveillance globally, but its diagnostic accuracy is unclear. We investigated the diagnostic accuracy of Minilab system for antimicrobials, using high-performance liquid chromatography (HPLC) as reference standard. Following the Minilab protocols and the Pharmacopoeia of the People's Republic of China protocols, Minilab-TLC and HPLC were used to test five common antimicrobials (506 batches) for relative concentration of active pharmaceutical ingredients. The prevalence of poor-quality antimicrobials determined, respectively, by Minilab TLC and HPLC was amoxicillin (0% versus 14.9%), azithromycin (0% versus 17.4%), cefuroxime axetil (14.3% versus 0%), levofloxacin (0% versus 3.0%), and metronidazole (0% versus 38.0%). The Minilab TLC had false-positive and false-negative detection rates of 2.6% (13/506) and 15.2% (77/506) accordingly, resulting in the following test characteristics: sensitivity 0%, specificity 97.0%, positive predictive value 0, negative predictive value 0.8, positive likelihood ratio 0, negative likelihood ratio 1.0, diagnostic odds ratio 0, and adjusted diagnostic odds ratio 0.2. This study demonstrates unsatisfying diagnostic accuracy of Minilab system in screening poor-quality antimicrobials of common use. Using Minilab as a stand-alone system for monitoring drug quality should be reconsidered.
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Affiliation(s)
- Hui Pan
- Shantou-Oxford Clinical Research Unit, Shantou University Medical College, Shantou, Guangdong, People’s Republic of China
| | - William Ba-Thein
- Shantou-Oxford Clinical Research Unit, Shantou University Medical College, Shantou, Guangdong, People’s Republic of China
- Department of Microbiology and Immunology, Shantou University Medical College, Shantou, Guangdong, People’s Republic of China
- Address correspondence to William Ba-Thein, Shantou-Oxford Clinical Research Unit, Shantou University Medical College, 22 Xinling Road, Jinping, Shantou, Guangdong 515041, People’s Republic of China. E-mail:
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Manjunath SV, Kumar SM, Ngo HH, Guo W. Metronidazole removal in powder-activated carbon and concrete-containing graphene adsorption systems: Estimation of kinetic, equilibrium and thermodynamic parameters and optimization of adsorption by a central composite design. J Environ Sci Health A Tox Hazard Subst Environ Eng 2017; 52:1269-1283. [PMID: 28920773 DOI: 10.1080/10934529.2017.1357406] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Metronidazole (MNZ) removal by two adsorbents, i.e., concrete-containing graphene (CG) and powder-activated carbon (PAC), was investigated via batch-mode experiments and the outcomes were used to analyze the kinetics, equilibrium and thermodynamics of MNZ adsorption. MNZ sorption on CG and PAC has followed the pseudo-second-order kinetic model, and the thermodynamic parameters revealed that MNZ adsorption was spontaneous on PAC and non-spontaneous on CG. Subsequently, two-parameter isotherm models, i.e., Langmuir, Freundlich, Temkin, Dubinin-Radushkevich and Elovich models, were applied to evaluate the MNZ adsorption capacity. The maximum MNZ adsorption capacities ([Formula: see text]) of PAC and CG were found to be between 25.5-32.8 mg/g and 0.41-0.002 mg/g, respectively. Subsequently, the effects of pH, temperature and adsorbent dosage on MNZ adsorption were evaluated by a central composite design (CCD) approach. The CCD experiments have pointed out the complete removal of MNZ at a much lower PAC dosage by increasing the system temperature (i.e., from 20°C to 40°C). On the other hand, a desorption experiment has shown 3.5% and 1.7% MNZ removal from the surface of PAC and CG, respectively, which was insignificant compared to the sorbed MNZ on the surface by adsorption. The overall findings indicate that PAC and CG with higher graphene content could be useful in MNZ removal from aqueous systems.
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Affiliation(s)
- S V Manjunath
- a Department of Civil Engineering , Indian Institute of Technology Madras , Chennai , Tamil Nadu , India
| | - S Mathava Kumar
- a Department of Civil Engineering , Indian Institute of Technology Madras , Chennai , Tamil Nadu , India
| | - Huu Hao Ngo
- b School of Civil and Environmental Engineering, University of Technology Sydney , Sydney , Australia
| | - Wenshan Guo
- b School of Civil and Environmental Engineering, University of Technology Sydney , Sydney , Australia
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Karthik R, Kumar JV, Chen SM, Kumar PS, Selvam V, Muthuraj V. A selective electrochemical sensor for caffeic acid and photocatalyst for metronidazole drug pollutant - A dual role by rod-like SrV 2O 6. Sci Rep 2017; 7:7254. [PMID: 28775311 PMCID: PMC5543073 DOI: 10.1038/s41598-017-07423-1] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Accepted: 06/26/2017] [Indexed: 11/08/2022] Open
Abstract
In the present study, well-defined one-dimensional (1D) rod-like strontium vanadate (SrV2O6) was prepared by simple hydrothermal method without using any other surfactants/templates. The successful formation of rod-like SrV2O6 was confirmed by various analytical and spectroscopic techniques. Interestingly, for the first time the dual role of as-prepared rod-like SrV2O6 were employed as an electrochemical sensor for the detection of caffeic acid (CA) as well as visible light active photocatalyst for the degradation of metronidazole (MNZ) antibiotic drug. As an electrochemical sensor, the SrV2O6 modified glassy carbon electrode (GCE) demonstrated a superior electrocatalytic activity for the detection of CA by chronoamperometry and cyclic voltammetry (CVs). In addition, the electrochemical sensor exhibited a good current response for CA with excellent selectivity, wide linear response range, lower detection limit and sensitivity of 0.01-207 µM, 4 nM and 2.064 μA μM-1cm-2, respectively. On the other hand, as-synthesized rod-like SrV2O6 showed highly efficient and versatile photocatalytic performances for the degradation of MNZ, which degrades above 98% of MNZ solution under visible light irradiation within 60 min. The obtained results evidenced that the improvement of rod-like SrV2O6 might be a resourceful electrocatalyst and photocatalyst material in the probable applications of environmental and biomedical applications.
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Affiliation(s)
- R Karthik
- Department of Chemical Engineering, National Taipei University of Technology, No. 1, Section 3, Chung-Hsiao East Road, Taipei, ROC, 106, Taiwan
| | - J Vinoth Kumar
- Department of Chemistry, VHNSN College, Virudhunagar, 626001, Tamilnadu, India
| | - Shen-Ming Chen
- Department of Chemical Engineering, National Taipei University of Technology, No. 1, Section 3, Chung-Hsiao East Road, Taipei, ROC, 106, Taiwan.
| | - P Senthil Kumar
- Department of Chemistry, VHNSN College, Virudhunagar, 626001, Tamilnadu, India
- Chemistry of Heterocycles & Natural Product Research Laboratory, Department of Chemistry, School of Advanced Sciences, VIT University, 632014, Vellore, Tamilnadu, India
| | - V Selvam
- Department of Chemistry, VHNSN College, Virudhunagar, 626001, Tamilnadu, India
| | - V Muthuraj
- Department of Chemistry, VHNSN College, Virudhunagar, 626001, Tamilnadu, India.
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Abstract
In this study, a simple, cost-effective, and sensitive HPLC diode-array detection method was developed for the simultaneous determination of six different 5-nitroimidazoles [metronidazole, 2-hydroxymethyl-1-methyl-5-nitro-1H-imidazole, dimetridazole (DMZ), ronidazole, ornidazole, and ipronidazole] in bovine milk samples. A QuEChERS-based sample preparation procedure was optimized by evaluating different cleanup sorbents, including zirconium-based sorbents (Z-Sep and Z-Sep+), C18, and primary-secondary amine (PSA), as well as EMR-Lipid cleanup solution. Acceptable analytical performance for all analytes was observed with recoveries in the range of 45-93% and RSDs of less than 15%. Negligible matrix interference was observed for most of the analytes due to application of PSA sorbent in a dispersive solid-phase extraction cleanup step. Method LOQs (mLOQs) for five of the six investigated analytes were set at a satisfactory low food product value of 2.5 ng/mL. For DMZ only, the mLOQ was set at 10 ng/mL. The procedure was evaluated through the analysis of 10 different natural samples.
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Affiliation(s)
- Tomasz Tuzimski
- Medical University in Lublin, Department of Physical Chemistry, 4A Chodźki St, 20-093 Lublin, Poland
| | - Tomasz Rejczak
- Medical University in Lublin, Department of Physical Chemistry, 4A Chodźki St, 20-093 Lublin, Poland
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Lien LTQ, Hoa NQ, Chuc NTK, Thoa NTM, Phuc HD, Diwan V, Dat NT, Tamhankar AJ, Lundborg CS. Antibiotics in Wastewater of a Rural and an Urban Hospital before and after Wastewater Treatment, and the Relationship with Antibiotic Use-A One Year Study from Vietnam. Int J Environ Res Public Health 2016; 13:E588. [PMID: 27314366 PMCID: PMC4924045 DOI: 10.3390/ijerph13060588] [Citation(s) in RCA: 75] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/16/2016] [Revised: 05/30/2016] [Accepted: 06/07/2016] [Indexed: 01/21/2023]
Abstract
Hospital effluents represent an important source for the release of antibiotics and antibiotic resistant bacteria into the environment. This study aims to determine concentrations of various antibiotics in wastewater before and after wastewater treatment in a rural hospital (60 km from the center of Hanoi) and in an urban hospital (in the center of Hanoi) in Vietnam, and it aims to explore the relationship between antibiotic concentrations in wastewater before wastewater treatment and quantities of antibiotics used in the rural hospital, over a period of one year in 2013. Water samples were collected using continuous sampling for 24 h in the last week of every month. The data on quantities of antibiotics delivered to all inpatient wards were collected from the Pharmacy department in the rural hospital. Solid-phase extraction and high performance liquid chromatography-tandem mass spectrometry were used for chemical analysis. Significant concentrations of antibiotics were present in the wastewater both before and after wastewater treatment of both the rural and the urban hospital. Ciprofloxacin was detected at the highest concentrations in the rural hospital's wastewater (before treatment: mean = 42.8 µg/L; after treatment: mean = 21.5 µg/L). Metronidazole was detected at the highest concentrations in the urban hospital's wastewater (before treatment: mean = 36.5 µg/L; after treatment: mean = 14.8 µg/L). A significant correlation between antibiotic concentrations in wastewater before treatment and quantities of antibiotics used in the rural hospital was found for ciprofloxacin (r = 0.78; p = 0.01) and metronidazole (r = 0.99; p < 0.001).
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Affiliation(s)
- La Thi Quynh Lien
- Global Health-Health Systems and Policy (HSP), Medicines, Focusing Antibiotics, Department of Public Health Sciences, Karolinska Institutet, Tomtebodavägen 18 A, Stockholm 17177, Sweden.
- Department of Pharmaceutical Management and Pharmaco-Economics, Hanoi University of Pharmacy, 13-15 Le Thanh Tong, Hoan Kiem District, Hanoi, Vietnam.
| | - Nguyen Quynh Hoa
- Department of Pharmacy, National Cancer Hospital, 30 Cau Buou, Thanh Tri District, Hanoi, Vietnam.
| | - Nguyen Thi Kim Chuc
- Department of Family Medicine, Hanoi Medical University, 01 Ton That Tung, Dong Da District, Hanoi, Vietnam.
| | - Nguyen Thi Minh Thoa
- Department of Family Medicine, Hanoi Medical University, 01 Ton That Tung, Dong Da District, Hanoi, Vietnam.
| | - Ho Dang Phuc
- Institute of Mathematics-VAST, 18 Hoang Quoc Viet, Cau Giay District, Hanoi, Vietnam.
| | - Vishal Diwan
- Global Health-Health Systems and Policy (HSP), Medicines, Focusing Antibiotics, Department of Public Health Sciences, Karolinska Institutet, Tomtebodavägen 18 A, Stockholm 17177, Sweden.
- Department of Public Health & Environment, R.D. Gardi Medical College, Agar Road, Ujjain 456006, India.
| | - Nguyen Thanh Dat
- Hanoi Drug and Cosmetic Testing Centre, 7/107 Nguyen Chi Thanh, Dong Da district, Hanoi, Vietnam.
| | - Ashok J Tamhankar
- Global Health-Health Systems and Policy (HSP), Medicines, Focusing Antibiotics, Department of Public Health Sciences, Karolinska Institutet, Tomtebodavägen 18 A, Stockholm 17177, Sweden.
- Indian Initiative for Management of Antibiotic Resistance, Department of Environmental Medicine, R.D. Gardi Medical College, Agar Road, Ujjain 456006, India.
| | - Cecilia Stålsby Lundborg
- Global Health-Health Systems and Policy (HSP), Medicines, Focusing Antibiotics, Department of Public Health Sciences, Karolinska Institutet, Tomtebodavägen 18 A, Stockholm 17177, Sweden.
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Flores-Cano JV, Sánchez-Polo M, Messoud J, Velo-Gala I, Ocampo-Pérez R, Rivera-Utrilla J. Overall adsorption rate of metronidazole, dimetridazole and diatrizoate on activated carbons prepared from coffee residues and almond shells. J Environ Manage 2016; 169:116-125. [PMID: 26731310 DOI: 10.1016/j.jenvman.2015.12.001] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [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: 07/01/2015] [Revised: 11/23/2015] [Accepted: 12/05/2015] [Indexed: 06/05/2023]
Abstract
This study analyzed the overall adsorption rate of metronidazole, dimetridazole, and diatrizoate on activated carbons prepared from coffee residues and almond shells. It was also elucidated whether the overall adsorption rate was controlled by reaction on the adsorbent surface or by intraparticle diffusion. Experimental data of the pollutant concentration decay curves as a function of contact time were interpreted by kinetics (first- and second-order) and diffusion models, considering external mass transfer, surface and/or pore volume diffusion, and adsorption on an active site. The experimental data were better interpreted by a first-order than second-order kinetic model, and the first-order adsorption rate constant varied linearly with respect to the surface area and total pore volume of the adsorbents. According to the diffusion model, the overall adsorption rate is governed by intraparticle diffusion, and surface diffusion is the main mechanism controlling the intraparticle diffusion, representing >90% of total intraparticle diffusion.
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Affiliation(s)
- J V Flores-Cano
- Department of Inorganic Chemistry, Faculty of Science, University of Granada, 18071 Granada, Spain
| | - M Sánchez-Polo
- Department of Inorganic Chemistry, Faculty of Science, University of Granada, 18071 Granada, Spain.
| | - J Messoud
- Department of Inorganic Chemistry, Faculty of Science, University of Granada, 18071 Granada, Spain
| | - I Velo-Gala
- Department of Inorganic Chemistry, Faculty of Science, University of Granada, 18071 Granada, Spain
| | - R Ocampo-Pérez
- Center of Postgraduate Research and Studies, Faculty of Chemical Sciences, San Luis Potosí Autonomous University, Av. Dr. M. Nava No. 6, San Luis Potosí SLP 78210, Mexico
| | - J Rivera-Utrilla
- Department of Inorganic Chemistry, Faculty of Science, University of Granada, 18071 Granada, Spain
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Attia KAM, Nassar MWI, El-Zeiny MB, Serag A. Zero order and signal processing spectrophotometric techniques applied for resolving interference of metronidazole with ciprofloxacin in their pharmaceutical dosage form. Spectrochim Acta A Mol Biomol Spectrosc 2016; 154:232-236. [PMID: 26540201 DOI: 10.1016/j.saa.2015.10.040] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [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: 09/02/2015] [Revised: 10/19/2015] [Accepted: 10/25/2015] [Indexed: 06/05/2023]
Abstract
Four rapid, simple, accurate and precise spectrophotometric methods were used for the determination of ciprofloxacin in the presence of metronidazole as interference. The methods under study are area under the curve, simultaneous equation in addition to smart signal processing techniques of manipulating ratio spectra namely Savitsky-Golay filters and continuous wavelet transform. All the methods were validated according to the ICH guidelines where accuracy, precision and repeatability were found to be within the acceptable limits. The selectivity of the proposed methods was tested using laboratory prepared mixtures and assessed by applying the standard addition technique. So, they can therefore be used for the routine analysis of ciprofloxacin in quality-control laboratories.
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Affiliation(s)
- Khalid A M Attia
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Al-Azhar University, 11751 Nasr City, Cairo, Egypt
| | - Mohammed W I Nassar
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Al-Azhar University, 11751 Nasr City, Cairo, Egypt
| | - Mohamed B El-Zeiny
- Analytical Chemistry Department, Faculty of Pharmacy, Modern University for Technology and Information (MTI), 12582 Al Hadaba Al Wosta, Cairo, Egypt
| | - Ahmed Serag
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Al-Azhar University, 11751 Nasr City, Cairo, Egypt.
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Li Y, Liu Y, Yang Y, Yu F, Liu J, Song H, Liu J, Tang H, Ye BC, Sun Z. Novel electrochemical sensing platform based on a molecularly imprinted polymer decorated 3D nanoporous nickel skeleton for ultrasensitive and selective determination of metronidazole. ACS Appl Mater Interfaces 2015; 7:15474-15480. [PMID: 26126643 DOI: 10.1021/acsami.5b03755] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [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: 06/04/2023]
Abstract
A novel electrochemical sensor has been developed by using a composite element of three-dimensional (3D) nanoporous nickel (NPNi) and molecularly imprinted polymer (MIP). NPNi is introduced in order to enhance the electron-transport ability and surface area of the sensor, while the electrosynthesized MIP layer affords simultaneous identification and quantification of the target molecule by employing Fe(CN)6(3-/4-) as the probe to indicate the current intensity. The morphology of the hybrid film was observed by scanning electron microscopy, and the properties of the sensor were examined by cyclic voltammetry and electrochemical impedance spectroscopy. By using metronidazole (MNZ) as a model analyte, the sensor based on the MIP/NPNi hybrid exhibits great features such as a remarkably low detection limit of 2 × 10(-14) M (S/N = 3), superb selectivity in discriminating MNZ from its structural analogues, and good antiinterference ability toward several coexisting substances. Moreover, the proposed method also demonstrates excellent repeatability and stability, with relative standard deviations of less than 1.12% and 1.4%, respectively. Analysis of MNZ in pharmaceutical dosage form and fish tissue is successfully carried out without assistance of complicated pretreatment. The MIP/NPNi composite presented here with admirable merits makes it a promising candidate for developing electrochemical sensor devices and plays a role in widespread fields.
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Affiliation(s)
- Yingchun Li
- †Key Laboratory of Xinjiang Endemic Phytomedicine Resources, Ministry of Education, School of Pharmacy, Shihezi University, Shihezi 832002, China
- ‡Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, China
| | - Yuan Liu
- †Key Laboratory of Xinjiang Endemic Phytomedicine Resources, Ministry of Education, School of Pharmacy, Shihezi University, Shihezi 832002, China
| | - Yang Yang
- †Key Laboratory of Xinjiang Endemic Phytomedicine Resources, Ministry of Education, School of Pharmacy, Shihezi University, Shihezi 832002, China
| | - Feng Yu
- ‡Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, China
| | - Jie Liu
- †Key Laboratory of Xinjiang Endemic Phytomedicine Resources, Ministry of Education, School of Pharmacy, Shihezi University, Shihezi 832002, China
| | - Han Song
- †Key Laboratory of Xinjiang Endemic Phytomedicine Resources, Ministry of Education, School of Pharmacy, Shihezi University, Shihezi 832002, China
| | - Jiang Liu
- †Key Laboratory of Xinjiang Endemic Phytomedicine Resources, Ministry of Education, School of Pharmacy, Shihezi University, Shihezi 832002, China
| | - Hui Tang
- †Key Laboratory of Xinjiang Endemic Phytomedicine Resources, Ministry of Education, School of Pharmacy, Shihezi University, Shihezi 832002, China
| | - Bang-Ce Ye
- ‡Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, China
| | - Zhipeng Sun
- §Xinjiang Uygur Autonomous Region Product Quality Supervision and Inspection Institute, Urumqi 830011, China
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Korany MA, Abdine HH, Ragab MAA, Aboras SI. Application of derivative spectrophotometry under orthogonal polynomial at unequal intervals: determination of metronidazole and nystatin in their pharmaceutical mixture. Spectrochim Acta A Mol Biomol Spectrosc 2015; 143:281-287. [PMID: 25748283 DOI: 10.1016/j.saa.2015.01.076] [Citation(s) in RCA: 9] [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: 04/19/2014] [Revised: 12/17/2014] [Accepted: 01/29/2015] [Indexed: 06/04/2023]
Abstract
This paper discusses a general method for the use of orthogonal polynomials for unequal intervals (OPUI) to eliminate interferences in two-component spectrophotometric analysis. In this paper, a new approach was developed by using first derivative D1 curve instead of absorbance curve to be convoluted using OPUI method for the determination of metronidazole (MTR) and nystatin (NYS) in their mixture. After applying derivative treatment of the absorption data many maxima and minima points appeared giving characteristic shape for each drug allowing the selection of different number of points for the OPUI method for each drug. This allows the specific and selective determination of each drug in presence of the other and in presence of any matrix interference. The method is particularly useful when the two absorption spectra have considerable overlap. The results obtained are encouraging and suggest that the method can be widely applied to similar problems.
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Affiliation(s)
- Mohamed A Korany
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, University of Alexandria, Egypt.
| | - Heba H Abdine
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, University of Alexandria, Egypt
| | - Marwa A A Ragab
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, University of Alexandria, Egypt
| | - Sara I Aboras
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, University of Alexandria, Egypt
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Wagil M, Maszkowska J, Białk-Bielińska A, Caban M, Stepnowski P, Kumirska J. Determination of metronidazole residues in water, sediment and fish tissue samples. Chemosphere 2015; 119 Suppl:S28-S34. [PMID: 24412503 DOI: 10.1016/j.chemosphere.2013.12.061] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [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: 10/23/2013] [Revised: 11/28/2013] [Accepted: 12/13/2013] [Indexed: 06/03/2023]
Abstract
Metronidazole (MNZ) is an antibacterial and antiprotozoal drug used in veterinary and human medicine. Its continual entry into the environment and its biological properties may have significant, long-term effects on the stability of ecosystems because MNZ and its metabolites possess mutagenic, carcinogenic and toxic properties. For this reason, the application of MNZ in food-producing species is prohibited in the EU, the USA and other countries. To ensure human food safety and to protect the environment, robust and reliable screening and confirmatory tests capable of the low-level detection of MNZ residues are required. The development of methods for MNZ determination in biological and environmental samples is thus an important analytical task in environmental and food science. This work focuses on the evaluation of a method for determining MNZ in water, sediment and fish tissue samples using liquid chromatography--ion trap mass spectrometry (LC-MS/MS). MNZ was extracted from waters on Strata XC cartridges using solid phase extraction (SPE), and from sediments and fish tissues by solid-liquid extraction (sediment: 15 mL 0.1 M HCl (pH=0.6), 15 min; fish tissue: 15 mL 1% CH3COOH in ACN, 1 min; drying: 5 g MgSO4(anhyd.; 30 s) with SPE purification of the extracts (from sediment: Strata XC cartridge; from fish tissue: Supelco NH2 cartridge). The optimal procedure that we developed was validated in order to confirm its reliability and sensitivity. Matrix effects (ME) were established. Absolute recoveries ranged from 89.3% to 97.2%, and the method detection limits were 3.4 ng L(-1) (water samples), 0.4 ng g(-1) (sediment samples) and 0.3 ng g(-1) (tissue samples). These methods were used to determine MNZ in surface waters, sediments and fish tissues from the Polish River Gościcina; MNZ was found in all these matrices. The highest concentrations in water, sediment and tissue were 136.2 ng L(-1), 12.0 ng g(-1) and 1.5 ng g(-1) respectively. The results confirmed that these methods are suitable for the simultaneous analysis of waters, sediments and fish tissues for the presence of MNZ.
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Affiliation(s)
- Marta Wagil
- Institute for Environmental and Human Health Protection, Faculty of Chemistry, University of Gdańsk, ul. Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Joanna Maszkowska
- Institute for Environmental and Human Health Protection, Faculty of Chemistry, University of Gdańsk, ul. Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Anna Białk-Bielińska
- Institute for Environmental and Human Health Protection, Faculty of Chemistry, University of Gdańsk, ul. Wita Stwosza 63, 80-308 Gdańsk, Poland.
| | - Magda Caban
- Institute for Environmental and Human Health Protection, Faculty of Chemistry, University of Gdańsk, ul. Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Piotr Stepnowski
- Institute for Environmental and Human Health Protection, Faculty of Chemistry, University of Gdańsk, ul. Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Jolanta Kumirska
- Institute for Environmental and Human Health Protection, Faculty of Chemistry, University of Gdańsk, ul. Wita Stwosza 63, 80-308 Gdańsk, Poland
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Zheng J, Liang L, Wang Z, Peng B, Li S, Lai J. [Experimental study on concentrations and pharmacokinetics of antibiotics in bile and evaluation of their microbicidal potential]. Zhonghua Wai Ke Za Zhi 2014; 52:775-780. [PMID: 25573219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVE To study the concentrations and pharmacokinetics of 6 different kinds of antibiotics in rabbit bile, and evaluate their microbicidal potential. METHODS Thirty-six health rabbits were randomly divided into 6 groups, and each group was 6 rabbits. After anaesthesia, the common bile duct of rabbit was isolated and cumulated with a silicone tube. The rabbits were administered intravenously with the equal-effect dose of antibiotics. Bile (1.5 ml) was collected at different time points after administration, and the concentration of antibiotics of bile was assayed by high performance liquid chromatography. The bile drug concentration-time data were processed by software to figure out the pharmacokinetic parameters such as maximum concentration (C(max)), peak time (T(max)), half-life time (T(1/2)), clearance (CL) and apparent volume of distribution (VD). The bile antibiotics concentration contrasted to the minimum inhibitory concentration (MIC), and attained the bactericidal index (C(max)/MIC) and the time when the drug concentration exceeded the MIC (T(>MIC)). RESULTS The C(max) and T1/2 of each antibiotic were as the followings: piperacillin (7 950 ± 3 023) mg/L and (1.97 ± 1.23) h, ceftriaxone (1 104 ± 248) mg/L and (3.14 ± 0.57) h, cefoperazone (5 215 ± 2 225) mg/L and (0.89 ± 0.13) h, meropenem (31.97 ± 12.44) mg/L and (0.36 ± 0.11) h, levofloxacin (66.3 ± 36.9) mg/L and (3.32 ± 2.57) h, metronidazole (28.2 ± 10.2) mg/L and (0.81 ± 0.33) h, respectively. Piperacillin/tazobactam and cefoperazone/sulbactam had the largest bactericidal index and the longest T(>MIC), and their bactericidal indexes were (62.1 ± 23.6) - (993.8 ± 377.9) and (164.8 ± 69.0) - (659.3 ± 275.9), their T(>MIC) were (6.00 ± 2.53) - (8.00 ± 0.00) h and (6.33 ± 1.97) - (8.00 ± 0.00) h. The bactericidal index and T(>MIC) of levofloxacin were the smallest, which were (2.1 ± 1.2) - (8.3 ± 4.6) and (0.54 ± 0.25) - (2.67 ± 1.03) h . Ceftriaxone and meropenem were as the medium, and their bactericidal indexes and T(>MIC) were (4.3 ± 1.0) - (69.2 ± 15.5) , (1.42 ± 0.65) - (8.00 ± 0.00) h and (2.0 ± 0.8) - (1 031.3 ± 401.4) , (0.29 ± 0.10) - (1.83 ± 0.26) h. The bactericidal index of metronidazole to anaerobic ranged from 7.4 to 294.9, and the T(>MIC) ranged from 1.88 to 5.00 h. CONCLUSIONS The bile concentrations of six antibiotics all exceed their effective bactericidal concentrations. The concentration-time curves of piperacillin, cefoperazone, meropenem and metronidazole conformed to one-compartment model, and ceftriaxone and levofloxacin are conformed to two-compartment model. Piperacillin/tazobactam and cefoperazone/sulbactam have the largest bactericidal index and the longest T(>MIC), so they can be chosen as the first choice for the therapy of hepatobiliary infection.For the anaerobic, the microbicidal potential of metronidazole is high.
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Affiliation(s)
- Jinglei Zheng
- Oncosurgery Department, Dongguan People's Hospital,Dongguan 523059, China.
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Issa MM, Nejem RM, Abu Shanab AM, Shaat NT. Kinetic spectrophotometric H-point standard addition method for the simultaneous determination of diloxanide furoate and metronidazole in binary mixtures and biological fluids. Spectrochim Acta A Mol Biomol Spectrosc 2013; 114:592-598. [PMID: 23807049 DOI: 10.1016/j.saa.2013.05.062] [Citation(s) in RCA: 7] [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] [Received: 10/30/2012] [Revised: 04/15/2013] [Accepted: 05/19/2013] [Indexed: 06/02/2023]
Abstract
Simple, reliable, and sensitive kinetic spectrophotometric method has been developed for the simultaneous determination of diloxanide furoate and metronidazole using H-point standard addition method (HPSAM). The method is based on the oxidation rate difference of diloxanide and metronidazole by potassium permanganate in basic medium. A green color has been developed and measured at 610 nm. Different experimental parameters were carefully optimized. The limiting logarithmic and the initial-rate methods were adopted for the construction of the calibration curve of each individual reaction with potassium permanganate. Under the optimum conditions, Beer's law was obeyed in the range of 1.0-20.0 and 5.0-25.0 μg ml(-1) for diloxanide furoate and metronidazole, respectively. The detection limits were 0.22 μg ml(-1) for diloxanide furoate and 0.83 μg ml(-1) for metronidazole. Correlation coefficients of the regression equations were greater than 0.9970 in all cases. The precision of the method was satisfactory; the maximum value of relative standard deviation did not exceed 1.06% (n=5). The accuracy, expressed as recovery was between 99.4% and 101.4% with relative error of 0.12 and 0.14 for diloxanide furoate and metronidazole, respectively. The proposed method was successfully applied for the simultaneous determination of both drugs in pharmaceutical dosage forms and human urine samples and compared with alternative HPLC method.
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Affiliation(s)
- Mahmoud Mohamed Issa
- Pharmaceutical Analytical Chemistry, Department of Chemistry, Alaqsa University, Gaza, Palestine
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Ali NW, Gamal M, Abdelkawy M. Chromatographic methods for simultaneous determination of diiodohydroxyquinoline and metronidazole in their binary mixture. Pak J Pharm Sci 2013; 26:865-871. [PMID: 24035940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Two chromatographic methods were developed for analysis ofdiiodohydroxyquinoline (DIHQ) and metronidazole (MTN). In the first method, diiodohydroxyquinoline and metronidazole were separated on TLC silica gel 60F254 plate using chloroform: acetone: glacial acetic acid (7.5: 2.5: 0.1, by volume) as mobile phase. The obtained bands were then scanned at 254 nm. The second method is a RP-HPLC method in which diiodohydroxyquinoline and metronidazole were separated on a reversed-phase C18 column using water : methanol (60 :40, V/V, PH=3.6 )as mobile phase at a flow rate of 0.7 mL.min-1 and UV detection at 220 nm. The mentioned methods were successfully used for determination of diiodohydroxyquinoline and metronidazole in pure form and in their pharmaceutical formulation.
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Affiliation(s)
- Nouruddin Wageih Ali
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Beni-Suef University, Alshaheed Shehata Ahmed Hegazy St., Beni-Suef Egypt
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Białecka W, Kulik A, Podolska M, Kwiatkowska-Puchniarz B, Mazurek A. Purity determination of gynalgin bactericidal tablets with HPLC method. Acta Pol Pharm 2013; 70:51-58. [PMID: 23610959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The study was aimed at developing a simple HPLC method for the determination of the content of impurities in Gynalgin, a two-component preparation. A satisfactory separation was performed on 250 x 4.6 mm Symmetry C8 column in a gradient elution system: mobile phase A--acetonitrile/buffer, pH 5.5 in 10:90, v/v proportion, and mobile phase B--acetonitrile/buffer, pH 5.5 in 75:25 v/v proportion. Two wavelengths: 250 nm and 315 nm were used for detection. Validation confirmed that the method was linear in a required concentration range. The values of correlation coefficients for specific drug substances and the related impurities were as high as 0.999. The results of the purity tests proved that the method was sufficiently selective and precise.
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Affiliation(s)
- Wanda Białecka
- Department of Basic and Applied Pharmacy, National Medicines Institute, 30/34 Chelmska St., 00-725 Warszawa, Poland.
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Abdelaleem EA, Abdelwahab NS. Validated chromatographic and spectrophotometric methods for analysis of some amoebicide drugs in their combined pharmaceutical preparation. Pak J Pharm Sci 2013; 26:175-183. [PMID: 23261745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
This work is concerned with development and validation of chromatographic and spectrophotometric methods for analysis of mebeverine HCl (MEH), diloxanide furoate (DF) and metronidazole (MET) in Dimetrol® tablets - spectrophotometric and RP-HPLC methods using UV detection. The developed spectrophotometric methods depend on determination of MEH and DF in the combined dosage form using the successive derivative ratio spectra method which depends on derivatization of the obtained ratio spectra in two steps using methanol as a solvent and measuring MEH at 226.4-232.2 nm (peak to peak) and DF at 260.6-264.8 nm (peak to peak). While MET concentrations were determined using first derivative (1D) at λ = 327 nm using the same solvent. The chromatographic method depends on HPLC separation on ODS column and elution with a mobile phase consisting water: methanol: triethylamine (25: 75: 0.5, by volume, orthophosphoric acid to pH =4). Pumping the mobile phase at 0.7 ml min-1 with UV at 230 nm. Factors affecting the developed methods were studied and optimized, moreover, they have been validated as per ICH guideline and the results demonstrated that the suggested methods are reproducible, reliable and can be applied for routine use with short time of analysis. Statistical analysis of the two developed methods with each other using F and student's-t tests showed no significant difference.
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Zhang ZW, Zuo J, Zhang CL. [Far-IR and THz absorption spectra studies of metronidazole, tinidazole and ornidazole]. Guang Pu Xue Yu Guang Pu Fen Xi 2012; 32:906-909. [PMID: 22715750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Metronidazole, tinidazole and ornidazole are 5-nitro-imidazole medicines used particularly for anaerobic bacteria and protozoa infections. The present paper reports that terahertz time-domain spectroscopy (THz-TDS) and Fourier transform infrared spectroscopy (Far-FTIR) were used to measure the fingerprint spectra of metronidazole, tinidazole and ornidazole in the frequency range of 0.9 - 19.5 THz under the room temperature. In addition, THz-TDS was also used to measure the absorption spectra of pure tinidazole and tinidazole tablets from different manufactures between 0.2 and 2.2 THz. In parallel with the experimental study, the cross correlation analysis was applied to compare the array of correlation coefficients between pure tinidazole and different tinidazole tablets. Results show that the method is rapid, simple and accurate to identify their effective chemical compositions and stability when the FTIR and THz spectra data combine with the array of correlation coefficient. Our research provides a visual approach to the standardization and modernization of the quality control in the production and sale of such drugs.
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Affiliation(s)
- Zhen-wei Zhang
- Department of Physics, Capital Normal University, Beijing Key Lab for Terahertz Spectroscopy and Imaging, Key Laboratory of Terahertz Optoelectronics, Ministry of Education, Beijing 100048, China.
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Fu H, Hu X, Ding C, Lin S. [Simultaneous determination of six antibiotics in disinfection products by high performance liquid chromatography tandem mass spectrometry]. Wei Sheng Yan Jiu 2012; 41:282-286. [PMID: 22611942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
OBJECTIVE To develop a method for determination of the Metronidazole, Chlortetracycline hydrochloride, Oxytetracycline dihydrate, Minocycline hydrochloride, Erythromycin and Tetracycline hydrochloride in disinfection products by high performance liquid chromatography tandem mass spectrometry(LC-MS/MS). METHODS Samples were extracted by methanol and filtered through 0.45 microm PTFE membrane filter, then analyzed by LC-MS/MS using Waters Symmetry C18 (2.1 mm x 150 mm, 3.5 microm) column in positive ion scan mode. The mobile phase was 5 mmol/L ammonium acetate, methanol and acetonitrile. RESULTS The linear range was 0-2000 ng/ml and the correlation coefficients were more than 0.998, the average recoveries ranged from 74.7% to 114% with the relative standard deviations between 1.6%-20.2%. The method was successfully used to detect the content of antibiotics in 115 disinfection products. CONCLUSION The method is simple, sensitive, selective and suitable for the analysis of residual content of antibiotics in cream formulations of disinfection products.
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Affiliation(s)
- Hui Fu
- Institute of Environmental Health and Related Product Safety, China CDC, Beijing 100021, China.
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Darwish KM, Salama I, Mostafa S, El-Sadek M. Extractional spectrophotometric analysis of metronidazole, tinidazole, ornidazole and secnidazole bases through acid-dye complexation using bromothymol blue dye. Pak J Pharm Sci 2012; 25:207-217. [PMID: 22186332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
An easy, precise and valid extractional-spectrophotometric technique is described for the assessment of metronidazole (MNZ), tinidazole (TNZ), ornidazole (ONZ) and secnidazole (SNZ) in pure state and in their pharmaceutical formulations. The technique includes first the reduction of above cited drugs using HCl and zinc powder, then the formation of intense yellow colored ion-association complex species (1:3 drug/dye) using bromothymol blue (BTB) in a buffered aqueous acidic medium at pH 3-3.50. The colored products are extracted into dichloromethane and quantitatively determined at 416-420 nm. The experimental operating factors influencing the ion-pairs development were studied and optimized to obtain the maximum color intensity. The Beer plots are obeyed in the concentration ranges 2.50-22.50, 2.50-30, 7.50-35 and 5-30 μgml-1 for MNZ, TNZ, ONZ and SNZ, respectively, with correlation coefficients not less than 0.9995. The proposed technique is recommended for the routine quality control analysis of the investigated drugs in commercial tablets with no observed interference from common pharmaceutical adjuvants. Results of such analysis were statistically validated and through recovery studies, showing excellent agreement with those achieved by the reported techniques.
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Affiliation(s)
- Khaled M Darwish
- Department of Pharmaceutical Chemistry, Suez Canal University, Ismailia, Egypt
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Jin L, Li L, Li XX, Yang T, Kong B, Xu PP. [Rapid analysis of metronidazole tablets by optic-fiber sensing technologies and the similarity of ultraviolet spectra]. Yao Xue Xue Bao 2011; 46:203-206. [PMID: 21542293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The paper is to report the development of an optic-fiber sensing technology method to analyze metronidazole tablets rapidly. In this fiber-optic sensing system, the light from source delivering to probe can be dipped into simple-handling sample solution, absorbed by the solution and reflected to the fiber-optic and detected in the detection system at last. Then the drug content can be shown in the screen from the ultraviolet absorption spectra and the consistency between that obtained by this method and that in China Pharmacopoeia can be compared. With regard to data processing, a new method is explored to identify the authenticity of drugs using the similarity between the sample map and the standard pattern by full ultraviolet spectrum. The results indicate that ultraviolet spectra of tablets can be obtained from this technology and the determination results showed no significant difference as compared with the method in China Pharmacopoeia (P > 0.05), and the similarity can be a parameter to identify the authenticity of drugs.
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Affiliation(s)
- Lu Jin
- School of Pharmacy, Xinjiang Medical University, Urumqi 830011, China
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Kida D, Pluta J. [The effect of the composition of stomatological dressings on Carbopol 971P and methylocelullose base on pharmaceutical availability of metronidazole]. Polim Med 2011; 41:33-38. [PMID: 22046825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023] Open
Abstract
The carried out studies allowed to propose composition of stomatological dressing makes opportunity to ensure preferable physiochemicals features for dosage forms. According to results formulations contain 1.5% Carbopol 971P, 0.13% methylocelullose and various quantity of glycerol, 1,2-propylene glycol and polyethylene glycol 400 were prepared. To compare formulation consists of only polymers dispersion (Carbopol 971P and methylocelullose) was prepared. Next to produced compound triethanoloamine to pH range 5.5-6.5 and 1% metronidazole added. Kinetics test of metronidazole release was performed in vitro using Hanson's cells and semipermable membrane. The quantity of the release metronidazole was determined by spectrophotometric method. Gel consists of 98% polymers dyspersion with 2% glycerol characterized by the largest pharmaceutical availability. The addition of 2% PEG 400 resulted in the decrease of the percentage of released substance in comparison to formulation without hydrophylisers. Metronidazole releasing was more efficient for dressings with 2% glycerol as well propylene glycol. For preparations contains glycerol (2 and 5%) as well propylene glycol as adiuvants, it was found that gels prepared on Carbopol 971P and methylocelullose revealed higher pharmaceutical availability than analogical dressings prepared with only one polymer base.
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Affiliation(s)
- Dorota Kida
- Katedra i Zakład Technologii Postaci Leku Akademia Medyczna we Wrocławiu.
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Kaale E, Risha P, Reich E, Layloff TP. An interlaboratory investigation on the use of high-performance thin layer chromatography to perform assays of lamivudine-zidovudine, metronidazole, nevirapine, and quinine composite samples. J AOAC Int 2010; 93:1836-1843. [PMID: 21313810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Two laboratories extensively investigated the use of HPTLC to perform assays on lamivudine-zidovudine, metronidazole, nevirapine, and quinine composite samples. To minimize the effects of differences in analysts' technique, the laboratories conducted the study with automatic sample application devices in conjunction with variable-wavelength scanning densitometers to evaluate the plates. The HPTLC procedures used relatively innocuous, inexpensive, and readily available chromatography solvents used in the Kenyon or the Global Pharma Health Fund Minilabs TLC methods. The use of automatic sample applications in conjunction with variable- wavelength scanning densitometry demonstrated an average repeatability or within-laboratory RSD of 1.90%, with 73% less than 2% and 97% at 2.60% or less, and an average reproducibility or among-laboratory RSD of 2.74%.
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Affiliation(s)
- Eliangiringa Kaale
- Muhimbili University of Health and Allied Sciences, School of Pharmacy, Laboratory for Pharmaceutical Analysis, PO Box 65013, Dares Salaam, Tanzania.
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