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Ren Y, Lu P, Qu G, Ning P, Ren N, Wang J, Wu F, Chen X, Wang Z, Zhang T, Cheng M, Chu X. Study on the mechanism of rapid degradation of Rhodamine B with Fe/Cu@antimony tailing nano catalytic particle electrode in a three dimensional electrochemical reactor. WATER RESEARCH 2023; 244:120487. [PMID: 37604016 DOI: 10.1016/j.watres.2023.120487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 08/09/2023] [Accepted: 08/13/2023] [Indexed: 08/23/2023]
Abstract
A novel particle electrode based on antimony tailings microspheres was successfully constructed by ultrasonic immersion calcination method, and the degradation of RhB was studied in a three-dimensional electrochemical reactor (3DER). It was characterized by XRD, SEM, EDS, XPS, cyclic voltammetry and linear sweep voltammetry. When the pH value is 5.00, the dosage of Fe/Cu@antimony tailing is 1.50 g/L, the initial concentration is 100 mg/L, and the current density is 20 mA/cm2, the degradation efficiency is the best (99.40% for RhB and 98.81% for TOC) within 15 min. The results show that in the three-dimensional electrochemical oxidation system, electrochemical oxidation and electro Fenton oxidation occur at the same time to cause the increase of hydroxyl radicals. According to LC-MS analysis and EPR characterization, it can be found that the main degradation mechanism of RhB is that hydroxyl radicals continuously attack RhB, and realize rapid degradation of RhB through deethylation, deamination, dealkylation, decarboxylation, chromophore splitting, ring opening and mineralization. Fe/Cu@antimony tailing particles are both electrodes for electrochemical oxidation and catalysts for Fenton oxidation. The degradation effect of RhB remained at 94% after 6 cycles, and the leaching rates of Fe and Cu are only 1.20% and 0.79%, indicating that Fe/Cu@AT had significant stability. This work provides a new insight into the establishment of an efficient and stable three-dimensional electrocatalytic particle electrode.
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Affiliation(s)
- Yuanchuan Ren
- Faculty of environmental science and engineering, Kunming University of Science and Technology, Kunming, Yunnan, 650500, China; National Regional Engineering Research Center-NCW, Kunming, Yunnan, 650500, China
| | - Ping Lu
- Faculty of environmental science and engineering, Kunming University of Science and Technology, Kunming, Yunnan, 650500, China; National Regional Engineering Research Center-NCW, Kunming, Yunnan, 650500, China
| | - Guangfei Qu
- Faculty of environmental science and engineering, Kunming University of Science and Technology, Kunming, Yunnan, 650500, China; National Regional Engineering Research Center-NCW, Kunming, Yunnan, 650500, China
| | - Ping Ning
- Faculty of environmental science and engineering, Kunming University of Science and Technology, Kunming, Yunnan, 650500, China; National Regional Engineering Research Center-NCW, Kunming, Yunnan, 650500, China
| | - Nanqi Ren
- School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Jun Wang
- Faculty of environmental science and engineering, Kunming University of Science and Technology, Kunming, Yunnan, 650500, China; National Regional Engineering Research Center-NCW, Kunming, Yunnan, 650500, China
| | - Fenghui Wu
- Faculty of environmental science and engineering, Kunming University of Science and Technology, Kunming, Yunnan, 650500, China; National Regional Engineering Research Center-NCW, Kunming, Yunnan, 650500, China
| | - Xiuping Chen
- Faculty of environmental science and engineering, Kunming University of Science and Technology, Kunming, Yunnan, 650500, China; National Regional Engineering Research Center-NCW, Kunming, Yunnan, 650500, China
| | - Zuoliang Wang
- Faculty of environmental science and engineering, Kunming University of Science and Technology, Kunming, Yunnan, 650500, China; National Regional Engineering Research Center-NCW, Kunming, Yunnan, 650500, China
| | - Ting Zhang
- Faculty of environmental science and engineering, Kunming University of Science and Technology, Kunming, Yunnan, 650500, China; National Regional Engineering Research Center-NCW, Kunming, Yunnan, 650500, China
| | - Minhua Cheng
- Faculty of environmental science and engineering, Kunming University of Science and Technology, Kunming, Yunnan, 650500, China; National Regional Engineering Research Center-NCW, Kunming, Yunnan, 650500, China
| | - Xiaomei Chu
- Faculty of environmental science and engineering, Kunming University of Science and Technology, Kunming, Yunnan, 650500, China; National Regional Engineering Research Center-NCW, Kunming, Yunnan, 650500, China
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2
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Wei J, Wang X, Tu C, Long T, Bu Y, Wang H, Jeyakumar P, Jiang J, Deng S. Remediation technologies for neonicotinoids in contaminated environments: Current state and future prospects. ENVIRONMENT INTERNATIONAL 2023; 178:108044. [PMID: 37364306 DOI: 10.1016/j.envint.2023.108044] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 05/05/2023] [Accepted: 06/13/2023] [Indexed: 06/28/2023]
Abstract
Neonicotinoids (NEOs) are synthetic insecticides with broad-spectrum insecticidal activity and outstanding efficacy. However, their extensive use and persistence in the environment have resulted in the accumulation and biomagnification of NEOs, posing significant risks to non-target organisms and humans. This review provides a summary of research history, advancements, and highlighted topics in NEOs remediation technologies and mechanisms. Various remediation approaches have been developed, including physiochemical, microbial, and phytoremediation, with microbial and physicochemical remediation being the most extensively studied. Recent advances in physiochemical remediation have led to the development of innovative adsorbents, photocatalysts, and optimized treatment processes. High-efficiency degrading strains with well-characterized metabolic pathways have been successfully isolated and cultured for microbial remediation, while many plant species have shown great potential for phytoremediation. However, significant challenges and gaps remain in this field. Future research should prioritize isolating, domesticating or engineering high efficiency, broad-spectrum microbial strains for NEO degradation, as well as developing synergistic remediation techniques to enhance removal efficiency on multiple NEOs with varying concentrations in different environmental media. Furthermore, a shift from pipe-end treatment to pollution prevention strategies is needed, including the development of green and economically efficient alternatives such as biological insecticides. Integrated remediation technologies and case-specific strategies that can be applied to practical remediation projects need to be developed, along with clarifying NEO degradation mechanisms to improve remediation efficiency. The successful implementation of these strategies will help reduce the negative impact of NEOs on the environment and human health.
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Affiliation(s)
- Jing Wei
- State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, Jiangsu, China; Guangdong Provincial Key Laboratory of Environmental Health and Land Resource, Guangdong Technology and Equipment Research Center for Soil and Water Pollution Control, Zhaoqing University, Zhaoqing 526061, Guangdong, China
| | - Xiaoyu Wang
- State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, Jiangsu, China; School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, China
| | - Chen Tu
- CAS Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences (CAS), Nanjing 210008, China.
| | - Tao Long
- State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, Jiangsu, China
| | - Yuanqing Bu
- State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, Jiangsu, China
| | - Hailong Wang
- Biochar Engineering Technology Research Center of Guangdong Province, School of Environment and Chemical Engineering, Foshan University, Foshan 528000, Guangdong, China
| | - Paramsothy Jeyakumar
- Environmental Sciences Group, School of Agriculture and Environment, Massey University, Palmerston North 4442, New Zealand
| | - Jinlin Jiang
- State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, Jiangsu, China
| | - Shaopo Deng
- State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, Jiangsu, China.
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Casado J. Minerals as catalysts of heterogeneous Electro-Fenton and derived processes for wastewater treatment: a review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023:10.1007/s11356-023-27776-7. [PMID: 37266777 DOI: 10.1007/s11356-023-27776-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Accepted: 05/16/2023] [Indexed: 06/03/2023]
Abstract
Advanced oxidation processes (AOPs) such as Fenton's reagent, which generates highly reactive oxygen species, are efficient in removing biorefractory organic pollutants from wastewater. However, Fenton's reagent has drawbacks such as the generation of iron sludge, high consumption of H2O2, and the need for pH control. To address these issues, Electro-Fenton (EF) and heterogeneous Electro-Fenton (HEF) have been developed. HEF, which uses solid catalysts, has gained increasing attention, and this review focuses on the use of mineral catalysts in HEF and derived processes. The reviewed studies highlight the advantages of using mineral catalysts, such as efficiency, stability, affordability, and environmental friendliness. However, obstacles to overcome include the agglomeration of unsupported nanoparticles and the complex preparation techniques and poor stability of some catalyst-containing cathodes. The review also discusses the optimal pH range and dosage of the heterogeneous catalysts and compares the performance of iron sulfides versus iron oxides. Although natural minerals appear to be the best choice for effluents at pH>4, no scale-up reports have been found. The need for further development in this field and the importance of considering the environmental impact of trace toxic metals or catalytic nanoparticles in the treated water on the receiving ecosystem is emphasized. Finally, the article acknowledges the high energy consumption of HEF processes at the lab scale and calls for their performance development to achieve environmentally friendly and cost-effective results using real wastewaters on a pilot scale.
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Affiliation(s)
- Juan Casado
- Facultad de Ciencias y Biociencias, Universidad Autónoma de Barcelona, Campus UAB s/n, 08038, Bellaterra, Barcelona, Spain.
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4
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Ha NM, Huong TT, The Son N. Synthesis of the MnO 2-Fe 3O 4 catalyst support on amorphous silica: a new Fenton's reagent in the degradation of the reactive blue-19 in aqueous solution. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2023; 58:506-514. [PMID: 37024787 DOI: 10.1080/10934529.2023.2198477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 03/20/2023] [Accepted: 03/24/2023] [Indexed: 06/19/2023]
Abstract
In this study, a new Fenton's reagent was synthesized via two steps: (1) the dispersed Fe3O4 nanoparticles were immobilized on the surface of the SiO2 carrier via the precipitation process, and (2) the MnO2 nano-sheets were coated on the surface of Fe3O4/SiO2 via hydrothermal method. The SiO2 carrier has been synthetically utilized from Vietnamese rice husk. The successful formation of the MnO2-Fe3O4/SiO2 composite has been analytically characterized by the XRD (X-ray diffraction), SEM (scanning electron microscope), EDS (energy dispersive spectrometry)-mapping, FTIR (Fourier transform infrared), SBET (Brunauer-Emmett-Teller specific surface area), and adsorption/desorption isotherms. This Fenton system was employed to catalyze degradation process of the reactive-blue 19 (RB19) with approximately 100% of removal efficiency after 25 min at the optimal condition of 0.15 g/100 mL of catalyst dosage, pH = 3, and the H2O2 concentration of 3 mL/100 mL. Moreover, the catalyst could be reused at least six times with high catalytic activity that was more than 90%. In conclusion, this study showed that the mesoporous MnO2-Fe3O4/SiO2 composite has a great potential for the removal application of dyes from wastewater, and the application of Vietnam rice husk in environmental treatment was developed.
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Affiliation(s)
- Nguyen Manh Ha
- Faculty of Chemical Technology, Hanoi University of Industry, Hanoi, Vietnam
| | - Tran Thi Huong
- Institute of Materials Science, Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| | - Ninh The Son
- Institute of Chemistry, VAST, Hanoi, Vietnam
- Graduate University of Science and Technology, VAST, Hanoi, Vietnam
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5
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Jin Q, Zhan Y, Tao D, Wang T, Khim JS, He Y. Removing emerging e-waste pollutant DTFPB by synchronized oxidation-adsorption Fenton technology. JOURNAL OF HAZARDOUS MATERIALS 2023; 445:130587. [PMID: 37055950 DOI: 10.1016/j.jhazmat.2022.130587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 11/17/2022] [Accepted: 12/08/2022] [Indexed: 06/19/2023]
Abstract
Liquid crystal monomers (LCMs), an emerging group of organic pollutants related to electronic waste, have been frequently detected from various environmental matrices, including landfill leachate. The persistence of LCMs requires robust technology for remediation. The objectives of this study were to evaluate the feasibility, performance and mechanism of the remediation of a typical LCM 4-[difluoro(3,4,5-trifluorophenoxy)methyl]- 3,5-difluoro-4'-propylbiphenyl (DTFPB) via synchronized oxidation-adsorption (SOA) Fenton technology and verify its application in DTFPB-contaminated leachate. The SOA Fenton system could effectively degrade 93.5% of DTFPB and 5.6% of its total organic carbon (TOCDTFPB) by hydroxyl radical oxidation (molar ratio of Fe2+ to H2O2 of 1/4 and pH 2.5-3.0) following a pseudo-first-order model under 0.378 h-1. Additionally, synchronized adsorption of DTFPB and its degradation intermediates by in situ resultant ferric particles via hydrophobic interaction, complexation, and coprecipitation contributed to almost 100% of DTFPB and 33.4% of TOCDTFPB removal. Three possible degradation pathways involving eight products were proposed, and hydrophobic interactions might drive the adsorption process. It was first confirmed that the SOA Fenton system exhibited good performance in eliminating DTFPB and byproducts from landfill leachate. This study provides new insights into the potential of the Fenton process for the treatment of emerging LCMs contamination in wastewater.
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Affiliation(s)
- Qianqian Jin
- School of Energy and Environment and State Key Laboratory of Marine Pollution, City University of Hong Kong, Hong Kong, China
| | - Yuting Zhan
- School of Energy and Environment and State Key Laboratory of Marine Pollution, City University of Hong Kong, Hong Kong, China
| | - Danyang Tao
- Department of Chemistry and State Key Laboratory of Marine Pollution, City University of Hong Kong, Hong Kong, China
| | - Tieyu Wang
- Institute of Marine Sciences, Shantou University, Shantou 515063, China
| | - Jong Seong Khim
- School of Earth and Environmental Sciences & Research Institute of Oceanography, Seoul National University, Seoul 08826, Republic of Korea
| | - Yuhe He
- School of Energy and Environment and State Key Laboratory of Marine Pollution, City University of Hong Kong, Hong Kong, China; Research Centre for the Oceans and Human Health, City University of Hong Kong Shenzhen Research Institute, Shenzhen 518057, China.
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6
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Ren Y, Wang J, Qu G, Ren N, Lu P, Chen X, Wang Z, Yang Y, Hu Y. Study on the mechanism of high effective mineralization of Rhodamine B in three dimensional electrochemical system with γ-Fe2O3@CNTs particle electrodes. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2023.123616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
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7
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Shokri A, Nasernejad B, Sanavi Fard M. Challenges and Future Roadmaps in Heterogeneous Electro-Fenton Process for Wastewater Treatment. WATER, AIR, AND SOIL POLLUTION 2023; 234:153. [PMID: 36844633 PMCID: PMC9942065 DOI: 10.1007/s11270-023-06139-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Accepted: 01/26/2023] [Indexed: 06/10/2023]
Abstract
The efficiency of heterogeneous electro-Fenton technology on the degradation of recalcitrant organic pollutants in wastewater is glaringly obvious. This green technology can be effectively harnessed for addressing ever-increasing water-related challenges. Due to its outstanding performance, eco-friendliness, easy automation, and operability over a wide range of pH, it has garnered significant attention from different wastewater treatment research communities. This review paper briefly discusses the principal mechanism of the electro-Fenton process, the crucial properties of a highly efficient heterogeneous catalyst, the heterogeneous electro-Fenton system enabled with Fe-functionalized cathodic materials, and its essential operating parameters. Moreover, the authors comprehensively explored the major challenges that prevent the commercialization of the electro-Fenton process and propose future research pathways to countervail those disconcerting challenges. Synthesizing heterogeneous catalysts by application of advanced materials for maximizing their reusability and stability, the full realization of H2O2 activation mechanism, conduction of life-cycle assessment to explore environmental footprints and potential adverse effects of side-products, scale-up from lab-scale to industrial scale, and better reactor design, fabrication of electrodes with state-of-the-art technologies, using the electro-Fenton process for treatment of biological contaminants, application of different effective cells in the electro-Fenton process, hybridization of the electro-Fenton with other wastewater treatments technologies and full-scale analysis of economic costs are key recommendations which deserve considerable scholarly attention. Finally, it concludes that by implementing all the abovementioned gaps, the commercialization of electro-Fenton technology would be a realistic goal.
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Affiliation(s)
- Aref Shokri
- Department of Chemical Engineering, Amirkabir University of Technology, Tehran, 15875-4413 Iran
- Jundi-Shapur Research Institute, Jundishapur University of Technology, Dezful, Iran
| | - Bahram Nasernejad
- Department of Chemical Engineering, Amirkabir University of Technology, Tehran, 15875-4413 Iran
| | - Mahdi Sanavi Fard
- Department of Chemistry, Faculty of Science, University of Qom, Qom, Iran
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8
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Puga A, Meijide J, Pazos M, Rosales E, Sanromán M. Electric field as a useful tool to improve the poor adsorption affinity of pollutants on carbonaceous aerogel pellets. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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9
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Li H, Liu G, Zhou B, Deng Z, Wang Y, Ma L, Yu Z, Zhou K, Wei Q. Periodic porous 3D boron-doped diamond electrode for enhanced perfluorooctanoic acid degradation. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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10
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Jevremović A, Stanojković A, Arsenijević D, Arsenijević A, Arzumanyan G, Mamatkulov K, Petrović J, Nedić Vasiljević B, Bajuk-Bogdanović D, Milojević-Rakić M. Mitigating toxicity of acetamiprid removal techniques - Fe modified zeolites in focus. JOURNAL OF HAZARDOUS MATERIALS 2022; 436:129226. [PMID: 35739746 DOI: 10.1016/j.jhazmat.2022.129226] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Revised: 05/11/2022] [Accepted: 05/22/2022] [Indexed: 06/15/2023]
Abstract
All remediation pathways in aqueous solutions come down to three dominant ones - physical, chemical, and combinations thereof. Materials proposed for adsorption and oxidative degradation can induce positive or negative effects on cells compared to the pollutants themselves. Present research deals with the effects different methods for pesticide remediation have and how they impact cytotoxicity. With this particular intention, Fe-modified zeolites (obtained via citrate/oxalate complexes) of three zeotypes (MFI, BEA and FAU) were prepared and tested as adsorbents and Fenton catalysts for the removal of the acetamiprid pesticide. The materials are characterized by AFM, FTIR spectroscopy and ICP-OES. A different effect of the zeolite framework and modification route was found among the samples, which leads to pronounced adsorption (FAU), efficient Fenton degradation (MFI) or synergistic effect of both mechanisms (BEA). The cytotoxic effects of acetamiprid in the presence of zeolites, in pristine and modified forms, were tested on the MRC-5 human fibroblast cell line. A complete survey of the toxicity effect behind different pesticide removal methods is presented. Since neither adsorption nor catalytic degradation is the best option for pesticide removal, the focus is shifted to a combination of these methods, which proved to be optimal for pesticide toxicity reduction.
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Affiliation(s)
- Anka Jevremović
- University of Belgrade Faculty of Physical Chemistry, 11000 Belgrade, Serbia.
| | - Ana Stanojković
- University of Belgrade Faculty of Physical Chemistry, 11000 Belgrade, Serbia
| | - Dragana Arsenijević
- University of Kragujevac Faculty of Medical Sciences, Department of Pharmacy and Center for Molecular Medicine and Stem Cells Research, 34000 Kragujevac, Serbia
| | - Aleksandar Arsenijević
- University of Kragujevac Faculty of Medical Sciences, Department of Pharmacy and Center for Molecular Medicine and Stem Cells Research, 34000 Kragujevac, Serbia
| | - Grigory Arzumanyan
- Joint Institute for Nuclear Research, Laboratory of Neutron Physics, Sector of Raman Spectroscopy Centre Nanobiophotonics, Dubna, Russia
| | - Kahramon Mamatkulov
- Joint Institute for Nuclear Research, Laboratory of Neutron Physics, Sector of Raman Spectroscopy Centre Nanobiophotonics, Dubna, Russia
| | - Jelena Petrović
- University of Belgrade "VINČA" Institute of Nuclear Sciences National Institute of the Republic of Serbia, Department of Physical Chemistry, Mike Petrovića Alasa, 11000 Belgrade, Serbia
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11
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Adsorption Kinetics of Imidacloprid, Acetamiprid and Methomyl Pesticides in Aqueous Solution onto Eucalyptus Woodchip Derived Biochar. MINERALS 2022. [DOI: 10.3390/min12050528] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
This work reports the application of a biochar (BC) derived from eucalyptus wood chips to remove pesticides (imidacloprid, acetamiprid and methomyl) from water. The pseudo-second order kinetic adsorption model is the best fit describing the adsorption of pesticides on BC. Furthermore, the Langmuir model correlated well with the adsorption isotherm data for acetamiprid and methomyl, while the Freundlich model was selected to explain the adsorption of imidacloprid on BC. The maximum adsorption capacities for methomyl, imidacloprid and acetamiprid on the BC material are 32.42, 14.75 and 4.87 mg g−1, respectively. The highest adsorption capacity of methomyl on the BC surface could be the result of multilayer adsorption suggested by the adsorption isotherm studies, with imidacloprid (or acetamiprid) monolayer being adsorbed on the BC surface. The structure, functional groups of pesticides, including their polarity, all played an important role contributing to the performance of biochar sorbent. Preferable interactions between the studied pesticides and the BC surface may include π-π interactions and hydrogen bonding. The steric aromatic entity in adsorbed imidacloprid and acetamiprid on the BC surface may hinder the possibility of other pesticide molecules approaching the available sorption sites on the surface.
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12
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Sharma RK, Kaushik B, Yadav S, Rana P, Rana P, Solanki K, Rawat D. Ingeniously designed Silica nanostructures as an exceptional support: Opportunities, potential challenges and future prospects for viable degradation of pesticides. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 301:113821. [PMID: 34731966 DOI: 10.1016/j.jenvman.2021.113821] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 09/16/2021] [Accepted: 09/22/2021] [Indexed: 06/13/2023]
Abstract
Despite significant advancements in modern agricultural practices, efficient handling of pesticides is a must as they are continuously defiling our terrestrial as well as aquatic life. During the last couple of decades, substantial efforts by various research groups have been devoted to find innovative solutions to remove pesticides from our environment in a greener way. In this regard, functionalized silica nanoparticles (NPs) have gained considerable attention of scientific community due to their notable properties such as amenable design, large surface area as well as fine-tunable and uniform pore structures which make them an ideal material for pesticides removal. The present review aims to proffer current scientific progress attained by silica-based nanostructures as an excellent material for effective removal of noxious agrochemicals. Further, a brief discussion on the synthetic strategies as well as intrinsic benefits associated with different morphologies of silica have also been highlighted in this article. It also summarizes the recent reports on silica assisted degradation of pesticides via enzymatic, chemical as well as advanced oxidation protocols. Additionally, it presents a critical analysis of different support materials for decontamination of our ecosystem. The review concludes with potential challenges, their possible solutions along with key knowledge gaps and future research directions for successful deployment of silica supported materials in degradation of pesticides at commercial scale.
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Affiliation(s)
- Rakesh Kumar Sharma
- Green Chemistry Network Centre, Department of Chemistry, University of Delhi, New Delhi, 110007, India.
| | - Bhawna Kaushik
- Green Chemistry Network Centre, Department of Chemistry, University of Delhi, New Delhi, 110007, India
| | - Sneha Yadav
- Green Chemistry Network Centre, Department of Chemistry, University of Delhi, New Delhi, 110007, India
| | - Pooja Rana
- Green Chemistry Network Centre, Department of Chemistry, University of Delhi, New Delhi, 110007, India
| | - Pooja Rana
- Green Chemistry Network Centre, Department of Chemistry, University of Delhi, New Delhi, 110007, India
| | - Kanika Solanki
- Green Chemistry Network Centre, Department of Chemistry, University of Delhi, New Delhi, 110007, India
| | - Deepti Rawat
- Department of Chemistry, Miranda House College, University of Delhi, New Delhi, 110007, India
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13
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Méndez-Novelo RI, San-Pedro L, May-Marrufo AA, Hernandez-Núñez E, Vales-Pinzón C, Escalante Soberanis MA. Optimization of the adsorption process in the treatment of sanitary landfill leachate by Fenton-adsorption. CHEM ENG COMMUN 2021. [DOI: 10.1080/00986445.2021.2018308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
| | - Liliana San-Pedro
- Faculty of Engineering, Autonomous University of Yucatán, Mérida, México
| | | | - Emanuel Hernandez-Núñez
- Sea Resources Department, Center of Research and Advanced Studies of the National Polytechnic Institute, Mérida, México
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14
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Yang H, Zhang Y, Chuang S, Cao W, Ruan Z, Xu X, Jiang J. Bioaugmentation of acetamiprid-contaminated soil with Pigmentiphaga sp. strain D-2 and its effect on the soil microbial community. ECOTOXICOLOGY (LONDON, ENGLAND) 2021; 30:1559-1571. [PMID: 33443714 DOI: 10.1007/s10646-020-02336-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 12/15/2020] [Indexed: 06/12/2023]
Abstract
Bioaugmentation, a strategy based on microbiome engineering, has been proposed for bioremediation of pollutant-contaminated environments. However, the complex microbiome engineering processes for soil bioaugmentation, involving interactions among the exogenous inoculum, soil environment, and indigenous microbial microbiome, remain largely unknown. Acetamiprid is a widely used neonicotinoid insecticide which has caused environmental contaminations. Here, we used an acetamiprid-degrading strain, Pigmentiphaga sp. D-2, as inoculum to investigate the effects of bioaugmentation on the soil microbial community and the process of microbiome reassembly. The bioaugmentation treatment removed 94.8 and 92.5% of acetamiprid within 40 days from soils contaminated with 50 and 200 mg/kg acetamiprid, respectively. A decrease in bacterial richness and diversity was detected in bioaugmentation treatments, which later recovered with the removal of acetamiprid from soil. Moreover, the bioaugmentation treatment significantly influenced the bacterial community structure, whereas application of acetamiprid alone had little influence on the soil microbial community. Furthermore, the bioaugmentation treatment improved the growth of bacteria associated with acetamiprid degradation, and the inoculated and recruited taxa significantly influenced the keystone taxa of the indigenous microbiome, resulting in reassembly of the bacterial community yielding higher acetamiprid-degrading efficiency than that of the indigenous and acetamiprid-treated communities. Our results provide valuable insights into the mechanisms of microbiome engineering for bioaugmentation of acetamiprid-contaminated soils.
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Affiliation(s)
- Hongxing Yang
- Department of Microbiology, Key Laboratory of Microbiology for Agricultural Environment, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China
- College of Resource and Environment, Anhui Science and Technology University, Anhui, 233100, China
| | - Yanlin Zhang
- Department of Microbiology, Key Laboratory of Microbiology for Agricultural Environment, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Shaochuang Chuang
- Department of Microbiology, Key Laboratory of Microbiology for Agricultural Environment, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Weimiao Cao
- Department of Microbiology, Key Laboratory of Microbiology for Agricultural Environment, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Zhepu Ruan
- Department of Microbiology, Key Laboratory of Microbiology for Agricultural Environment, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Xihui Xu
- Department of Microbiology, Key Laboratory of Microbiology for Agricultural Environment, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China.
| | - Jiandong Jiang
- Department of Microbiology, Key Laboratory of Microbiology for Agricultural Environment, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China.
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Abstract
The presence of pharmaceutical products in the water cycle may cause harmful effects such as morphological, metabolic and sex alterations in aquatic organisms and the selection/development of organisms resistant to antimicrobial agents. The compounds’ stability and persistent character hinder their elimination by conventional physico-chemical and biological treatments and thus, the development of new water purification technologies has drawn great attention from academic and industrial researchers. Recently, the electro-Fenton process has been demonstrated to be a viable alternative for the removal of these hazardous, recalcitrant compounds. This process occurs under the action of a suitable catalyst, with the majority of current scientific research focused on heterogeneous systems. A significant area of research centres working on the development of an appropriate catalyst able to overcome the operating limitations associated with the homogeneous process is concerned with the short service life and difficulty in the separation/recovery of the catalyst from polluted water. This review highlights a present trend in the use of different materials as electro-Fenton catalysts for pharmaceutical compound removal from aquatic environments. The main challenges facing these technologies revolve around the enhancement of performance, stability for long-term use, life-cycle analysis considerations and cost-effectiveness. Although treatment efficiency has improved significantly, ongoing research efforts need to deliver economic viability at a larger scale due to the high operating costs, primarily related to energy consumption.
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Yu F, Wang Y, Ma H, Zhou M. Hydrothermal synthesis of FeS2 as a highly efficient heterogeneous electro-Fenton catalyst to degrade diclofenac via molecular oxygen effects for Fe(II)/Fe(III) cycle. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.117022] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Iron-Loaded Catalytic Silicate Adsorbents: Synthesis, Characterization, Electroregeneration and Application for Continuous Removal of 1-Butylpyridinium Chloride. Catalysts 2020. [DOI: 10.3390/catal10090950] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
This research proposes the application of iron-loaded sepiolite (S-Fe) as a catalytic adsorbent for the unreported 1-butylpyridinium chloride ([bpy] Cl) treatment in an aqueous medium. Initially, sepiolite was selected as an inexpensive and efficacious adsorbent for [bpy] Cl elimination. After that, sepiolite was loaded with iron for the subsequent electro-Fenton (EF) regeneration treatment. Once kinetic and isotherm studies were performed, providing respectively almost instantaneous adsorption (20 min) and an uptake of 22.85 mg/g, [bpy] Cl adsorption onto S-Fe was studied in continuous mode. The obtained breakthrough curve was analyzed using three standard breakthrough models, being Yoon–Nelson and Thomas the most suitable adjustments. Afterwards, S-Fe regeneration by the EF process was conducted using this iron-loaded silicate material as a heterogeneous catalyst. Under optimized operational conditions (current intensity 300 mA and Na2SO4 0.3 M), complete adsorbent regeneration was achieved in 10 h. The total mineralization of [bpy] Cl was reached within 24 h and among seven carboxylic acids detected, oxalic and acetic acids seem to be the primary carboxylic acids produced by [bpy] Cl degradation. Finally, S-Fe was efficiently used in four consecutive adsorption–regeneration cycles without a noticeable reduction in its adsorption capacity, opening a path for future uses.
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Campos S, Salazar R, Arancibia-Miranda N, Rubio MA, Aranda M, García A, Sepúlveda P, Espinoza LC. Nafcillin degradation by heterogeneous electro-Fenton process using Fe, Cu and Fe/Cu nanoparticles. CHEMOSPHERE 2020; 247:125813. [PMID: 31951953 DOI: 10.1016/j.chemosphere.2020.125813] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 12/30/2019] [Accepted: 12/31/2019] [Indexed: 05/03/2023]
Abstract
Heterogeneous electro-Fenton (HEF) is as an alternative to the conventional electro-Fenton (EF) process. HEF uses a solid phase catalyst, whereas EF employs a solubilized one. This implies that in HEF, material can be recovered through a simple separation process such as filtration or magnetic separation in HEF. HEF also has the advantage of not requires a previous pH adjustment, which facilitates working in a higher pH range. In this work, Fe, Cu and Fe/Cu bimetallic nanoparticles (Fe/Cu NPs) were synthesized, characterized and used for the degradation of Nafcillin (NAF). The effect of the adsorption and the anodic oxidation (AO-H2O2) process was tested to assess their influence on HEF. NAF adsorption did not exceed 24% of antibiotic removal and the AO-H2O2 process eliminated the total NAF after 240 min of electrolysis. Through the HEF process, the antibiotic was completely removed using Fe/Cu NPs after 7.0 min of electrolysis, while these NPs, mineralization reached 41% after 240 min. In this case, NAF degradation occurs mainly due to the generation of hydroxyl radicals in the BDD electrode, and the Fenton reaction with Fe and Cu NPs. The main organic intermediates produced during the degradation of NAF by HEF were identified allowing the proposal of degradation pathway. Finally, the antibiotic was also completely eliminated from a wastewater from slaughterhouse after 15 min of treatment by HEF and using Fe/Cu bimetallic NPs.
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Affiliation(s)
- Sebastian Campos
- Laboratorio de Electroquímica del Medio Ambiente, LEQMA, Departamento de Química de los Materiales, Universidad de Santiago de Chile, USACH, Casilla 40, C.P. 33, Av. Libertador Bernardo ÓHiggins, 3363, Estación Central, Santiago, Chile
| | - Ricardo Salazar
- Laboratorio de Electroquímica del Medio Ambiente, LEQMA, Departamento de Química de los Materiales, Universidad de Santiago de Chile, USACH, Casilla 40, C.P. 33, Av. Libertador Bernardo ÓHiggins, 3363, Estación Central, Santiago, Chile.
| | - Nicolás Arancibia-Miranda
- Center for the Development of Nanoscience and Nanotechnology, CEDENNA, 9170124, Av. Libertador Bernardo ÓHiggins, 3363, Estación Central, Santiago, Chile; Facultad de Química and Biología, Universidad de Santiago de Chile, USACH, Casilla 40, C.P. 33, Av. Libertador Bernardo ÓHiggins, 3363, Estación Central, Santiago, Chile
| | - M A Rubio
- Center for the Development of Nanoscience and Nanotechnology, CEDENNA, 9170124, Av. Libertador Bernardo ÓHiggins, 3363, Estación Central, Santiago, Chile; Facultad de Química and Biología, Universidad de Santiago de Chile, USACH, Casilla 40, C.P. 33, Av. Libertador Bernardo ÓHiggins, 3363, Estación Central, Santiago, Chile
| | - Mario Aranda
- Laboratorio de Investigación en Fármacos y Alimentos, Departamento de Farmacia, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Chile
| | - Alejandra García
- Laboratorio de síntesis y modificación de nanoestructuras y materiales bidimensionales, Centro de Investigación en Materiales, Avanzados S.C. (CIMAV), Mexico
| | - Pamela Sepúlveda
- Center for the Development of Nanoscience and Nanotechnology, CEDENNA, 9170124, Av. Libertador Bernardo ÓHiggins, 3363, Estación Central, Santiago, Chile; Facultad de Química and Biología, Universidad de Santiago de Chile, USACH, Casilla 40, C.P. 33, Av. Libertador Bernardo ÓHiggins, 3363, Estación Central, Santiago, Chile.
| | - L Carolina Espinoza
- Laboratorio de Electroquímica del Medio Ambiente, LEQMA, Departamento de Química de los Materiales, Universidad de Santiago de Chile, USACH, Casilla 40, C.P. 33, Av. Libertador Bernardo ÓHiggins, 3363, Estación Central, Santiago, Chile.
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Diouf I, Dia O, Diedhiou MB, Drogui P, Toure AO, Lo SM, Rumeau M, Mar/Diop CG. Electro-generation of hydrogen peroxide using a graphite cathode from exhausted batteries: study of influential parameters on electro-Fenton process. ENVIRONMENTAL TECHNOLOGY 2020; 41:1434-1445. [PMID: 30325702 DOI: 10.1080/09593330.2018.1537309] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Accepted: 10/11/2018] [Indexed: 06/08/2023]
Abstract
In this work, the study of hydrogen peroxide (H2O2) electro-generation using graphite from exhausted batteries (Gr-Bat) was conducted. Linear sweep voltammetry and electrolysis experiments were carried out in a single compartment electrochemical cell. Study of the possibility to use this electrode revealed that it presents, as vitreous carbon (VC) electrode, a reduction of oxygen with two successive waves (bi-electronic reduction). The first wave corresponds to the reduction of O2 to H2O2, while the second one corresponds to the reduction of H2O2 to H2O. The cathodic potentials for electro-generation of H2O2 appeared at -600 and -700 mV vs. Ag/AgCl for Gr-Bat and VC electrodes, respectively. Subsequently, electrolysis experiments were conducted by imposing the potentials required for H2O2 formation. The effect of several operating parameters on H2O2 production, such as the nature and concentration of the electrolyte, the pH, the presence of ferrous ions and O2 injection were studied using Gr-Bat and VC electrodes, respectively. For both electrodes, the acidic medium was more favorable for H2O2 electro-generation. The oxygen injection in solution promoted an increase of H2O2 concentration, but its effect was more pronounced in the case of VC electrode. Application for crystal violet degradation by electro-Fenton revealed that Gr-Bat had the best purification performance. A removal rate of 73.18% was obtained with Gr-Bat electrode against 62.27% with VC electrode for an electrolysis time of 120 min. This study has demonstrated the possibility of recycling Gr-Bat by using them as cathode materials in the electro-Fenton process.
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Affiliation(s)
- Ibrahima Diouf
- Laboratoire d'Electrochimie et des Procédés Membranaires, Ecole Supérieure Polytechnique, Université Cheikh Anta Diop, Dakar-Fann, Senegal
| | - Oumar Dia
- Institut national de la recherche scientifique (INRS-Eau Terre et Environnement), Université du Quebec, , Quebec, Canada
| | - Moussa Bagha Diedhiou
- Laboratoire d'Electrochimie et des Procédés Membranaires, Ecole Supérieure Polytechnique, Université Cheikh Anta Diop, Dakar-Fann, Senegal
| | - Patrick Drogui
- Institut national de la recherche scientifique (INRS-Eau Terre et Environnement), Université du Quebec, , Quebec, Canada
| | - Alpha Ousmane Toure
- Laboratoire d'Electrochimie et des Procédés Membranaires, Ecole Supérieure Polytechnique, Université Cheikh Anta Diop, Dakar-Fann, Senegal
| | - Sidy Mambaye Lo
- Laboratoire d'Electrochimie et des Procédés Membranaires, Ecole Supérieure Polytechnique, Université Cheikh Anta Diop, Dakar-Fann, Senegal
| | - Michel Rumeau
- Laboratoire d'Electrochimie et des Procédés Membranaires, Ecole Supérieure Polytechnique, Université Cheikh Anta Diop, Dakar-Fann, Senegal
| | - Codou Gueye Mar/Diop
- Laboratoire d'Electrochimie et des Procédés Membranaires, Ecole Supérieure Polytechnique, Université Cheikh Anta Diop, Dakar-Fann, Senegal
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Saljooqi A, Shamspur T, Mostafavi A. Synthesis of titanium nanoplate decorated by Pd and Fe3O4 nanoparticles immobilized on graphene oxide as a novel photocatalyst for degradation of parathion pesticide. Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114371] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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Double benefit of electrochemical techniques: Treatment and electroanalysis for remediation of water polluted with organic compounds. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.134628] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Pettignano A, Aguilera DA, Tanchoux N, Bernardi L, Quignard F. Alginate: A Versatile Biopolymer for Functional Advanced Materials for Catalysis. STUDIES IN SURFACE SCIENCE AND CATALYSIS 2019. [DOI: 10.1016/b978-0-444-64127-4.00017-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Liu D, Zhang H, Wei Y, Liu B, Lin Y, Li G, Zhang F. Enhanced degradation of ibuprofen by heterogeneous electro-Fenton at circumneutral pH. CHEMOSPHERE 2018; 209:998-1006. [PMID: 30114751 DOI: 10.1016/j.chemosphere.2018.06.164] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2018] [Revised: 06/26/2018] [Accepted: 06/27/2018] [Indexed: 06/08/2023]
Abstract
Fenton based reactions are effective for pharmaceutical removals, but traditional Fenton processes have drawbacks of pH adjustment and large amount of produced iron sludge. To overcome these challenges, a heterogeneous electro-Fenton process was proposed for effective contaminant degradation at circumneutral pH without iron sludge production. The anti-inflammatory drug ibuprofen (a common pharmaceutical in natural waters) was used as a representative contaminant. Activated carbon fibers (ACFs) supported ferric citrate (Cit-Fe/ACFs) was synthesized and used as the cathode, and RuO2/Ti was used as the anode. H2O2 was electro-generated in situ from O2 reduction and the production rate of OH per unit area was 6.8 μM W-1 cm-2 using Cit-Fe/ACFs cathode. A maximal ibuprofen degradation of 97% was obtained after 120 min at the current density of 7 mA cm-2. The electrical energy per order (EEO) varied from 0.24±0.03 to 2.65±0.04 kWh log-1 m-3 when the current density ranged from 1 to 7 mA cm-2. The Cit-Fe/ACFs cathode showed relatively good reusability and ∼85% IBP removal was achieved after 6 cycles of degradation. Our results showed that the prepared Cit-Fe/ACFs cathode was promising for the treatment of pharmaceutical contaminants.
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Affiliation(s)
- Dun Liu
- School of Environment and State Key Joint Laboratory of Environment Simulation and Pollution Control, Tsinghua University, Beijing 100084, China
| | - Hao Zhang
- School of Environment and State Key Joint Laboratory of Environment Simulation and Pollution Control, Tsinghua University, Beijing 100084, China
| | - Yuquan Wei
- School of Environment and State Key Joint Laboratory of Environment Simulation and Pollution Control, Tsinghua University, Beijing 100084, China
| | - Bo Liu
- School of Environment and State Key Joint Laboratory of Environment Simulation and Pollution Control, Tsinghua University, Beijing 100084, China
| | - Yipeng Lin
- School of Environment and State Key Joint Laboratory of Environment Simulation and Pollution Control, Tsinghua University, Beijing 100084, China
| | - Guanghe Li
- School of Environment and State Key Joint Laboratory of Environment Simulation and Pollution Control, Tsinghua University, Beijing 100084, China
| | - Fang Zhang
- School of Environment and State Key Joint Laboratory of Environment Simulation and Pollution Control, Tsinghua University, Beijing 100084, China.
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Poza-Nogueiras V, Rosales E, Pazos M, Sanromán MÁ. Current advances and trends in electro-Fenton process using heterogeneous catalysts - A review. CHEMOSPHERE 2018. [PMID: 29529567 DOI: 10.1016/j.chemosphere.2018.03.002] [Citation(s) in RCA: 77] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Over the last decades, advanced oxidation processes have often been used alone, or combined with other techniques, for remediation of ground and surface water pollutants. The application of heterogeneous catalysis to electrochemical advanced oxidation processes is especially useful due to its efficiency and environmental safety. Among those processes, electro-Fenton stands out as the one in which heterogeneous catalysis has been broadly applied. Thus, this review has introduced an up-to-date collation of the current knowledge of the heterogeneous electro-Fenton process, highlighting recent advances in the use of different catalysts such as iron minerals (pyrite, magnetite or goethite), prepared catalysts by the load of metals in inorganic and organic materials, nanoparticles, and the inclusion of catalysts on the cathode. The effects of physical-chemical parameters as well as the mechanisms involved are critically assessed. Finally, although the utilization of this process to remediation of wastewater overwhelmingly outnumber other utilities, several applications have been described in the context of regeneration of adsorbent or the remediation of soils as clear examples of the feasibility of the electro-Fenton process to solve different environmental problems.
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Affiliation(s)
- Verónica Poza-Nogueiras
- Department of Chemical Engineering, University of Vigo, Campus As Lagoas-Marcosende, 36310, Vigo, Spain
| | - Emilio Rosales
- Department of Chemical Engineering, University of Vigo, Campus As Lagoas-Marcosende, 36310, Vigo, Spain
| | - Marta Pazos
- Department of Chemical Engineering, University of Vigo, Campus As Lagoas-Marcosende, 36310, Vigo, Spain
| | - M Ángeles Sanromán
- Department of Chemical Engineering, University of Vigo, Campus As Lagoas-Marcosende, 36310, Vigo, Spain.
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