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Farissi S, Abubakar GA, Akhilghosh KA, Muthukumar A, Muthuchamy M. Sustainable application of electrocatalytic and photo-electrocatalytic oxidation systems for water and wastewater treatment: a review. ENVIRONMENTAL MONITORING AND ASSESSMENT 2023; 195:1447. [PMID: 37945768 DOI: 10.1007/s10661-023-12083-y] [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: 06/06/2023] [Accepted: 10/31/2023] [Indexed: 11/12/2023]
Abstract
Wastewater treatment and reuse have risen as a solution to the water crisis plaguing the world. Global warming-induced climate change, population explosion and fast depletion of groundwater resources are going to exacerbate the present global water problems for the forthcoming future. In this scenario, advanced electrochemical oxidation process (EAOP) utilising electrocatalytic (EC) and photoelectrocatalytic (PEC) technologies have caught hold of the interest of the scientific community. The interest stems from the global water management plans to scale down centralised water and wastewater treatment systems to decentralised and semicentralised treatment systems for better usage efficiency and less resource wastage. In an age of rising water pollution caused by contaminants of emerging concern (CECs), EC and PEC systems were found to be capable of optimal mineralisation of these pollutants rendering them environmentally benign. The present review treads into the conventional electrochemical treatment systems to identify their drawbacks and analyses the scope of the EC and PEC to mitigate them. Probable electrode materials, potential catalysts and optimal operational conditions for such applications were also examined. The review also discusses the possible retrospective application of EC and PEC as point-of-use and point-of-entry treatment systems during the transition from conventional centralised systems to decentralised and semi-centralised water and wastewater treatment systems.
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Affiliation(s)
- Salman Farissi
- Department of Environmental Science, Central University of Kerala, Thejaswini Hills, Periye, Kasaragod-671320, Kerala, India
| | - Gado Abubakar Abubakar
- Department of Physics, Kebbi State University of Science and Technology, Aleiro, Kebbi State, Nigeria
| | | | - Anbazhagi Muthukumar
- Department of Environmental Science, Central University of Kerala, Thejaswini Hills, Periye, Kasaragod-671320, Kerala, India
| | - Muthukumar Muthuchamy
- Department of Environmental Science, Central University of Kerala, Thejaswini Hills, Periye, Kasaragod-671320, Kerala, India.
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2
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Biswas B, Goel S. Electrocoagulation and electrooxidation technologies for pesticide removal from water or wastewater: A review. CHEMOSPHERE 2022; 302:134709. [PMID: 35489460 DOI: 10.1016/j.chemosphere.2022.134709] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Revised: 04/17/2022] [Accepted: 04/21/2022] [Indexed: 06/14/2023]
Abstract
Pesticides are known to be threats to the environment and human health. Excessive use of pesticides in agricultural practice can contaminate water bodies, leading to cancer, asthma, neurological disorders, reproductive defects, and hormonal disruption. Electrochemical methods such as electrocoagulation and electrooxidation can be used for pesticide removal due to their numerous advantages such as high efficiency, less sludge production, and low operational cost. During electrocoagulation, dissolution of anode metals results in metal hydroxide complexes, which precipitate with the contaminant present in the reactor. Simultaneously, electro-flotation occurs at the cathode and results in the evolution of hydrogen gas bubbles, leading to flotation of floc to the top surface of the reactor. This review focuses on the removal mechanisms, kinetics, modeling, effects of influencing factors, and sludge characterization of pesticide removal using electrocoagulation and electrooxidation. Major influencing factors include cell configuration, electrode material, current density, pH, supporting electrolyte concentration. In general, aluminum and iron are the most common electrodes used for pesticide removal using electrocoagulation, while boron-doped diamond was used to a far greater extent as the electrode in electrooxidation studies. Greater than 99% removal efficiency was observed in both processes. Overall, this review summarizes the use of electrochemical methods for pesticide removal and offers valuable information to researchers in this area of study.
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Affiliation(s)
- Bishwatma Biswas
- Environmental Engineering and Management, Department of Civil Engineering, Indian Institute of Technology Kharagpur, Kharagpur, 721302, West Bengal, India
| | - Sudha Goel
- Environmental Engineering and Management, Department of Civil Engineering, Indian Institute of Technology Kharagpur, Kharagpur, 721302, West Bengal, India.
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3
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Development of poly(vinyl alcohol)/citric acid/MIL-88A@CNTs electrospun nanofibers for thin-film micro-extraction of conazole fungicides followed by CD-IMS analysis. CHEMICAL PAPERS 2022. [DOI: 10.1007/s11696-022-02206-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Diao Y, Yang Y, Cui L, Shen Y, Wang H, Yao Y. Electrochemical degradation of vanillin using lead dioxide electrode: influencing factors and reaction pathways. ENVIRONMENTAL TECHNOLOGY 2022; 43:646-657. [PMID: 32677547 DOI: 10.1080/09593330.2020.1797902] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Accepted: 07/08/2020] [Indexed: 06/11/2023]
Abstract
In this study, a novel PbO2-CeO2 composite electrode was applied it to the electrocatalytic degradation of vanillin. The operating parameters such as applied current density, initial vanillin concentration, supporting electrolyte concentration and pH value were investigated and optimised. After 120 min, in a 0.10 mol L-1 Na2SO4 solution with a current density of 50 mA cm-2 and a pH value of 5.0 containing 30 mg L-1 vanillin, the vanillin removal efficiency can reach 98.03%, the COD removal efficiency is up to 73.28%. The results indicate that electrochemical degradation has a high ability to remove vanillin in aqueous solution. The reaction follows a pseudo-first-order reaction kinetics model with rate constants of 0.03036 min-1. In the process of electrochemical degradation, up to eight hydroxylated or polyhydroxylated oxidation by-products were identified through hydroxylation, dealkylation and substitution reactions. Furthermore, the degradation pathways were proposed, which eventually mineralised into inorganic water and carbon dioxide.
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Affiliation(s)
- Yuhan Diao
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, People's Republic of China
| | - Yang Yang
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, People's Republic of China
| | - Leilei Cui
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, People's Republic of China
| | - Ying Shen
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, People's Republic of China
| | - Han Wang
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, People's Republic of China
| | - Yingwu Yao
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, People's Republic of China
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Zhang J, Li P, Ma J, Jia Q. [Recent developments of pesticide adsorbents based on cyclodextrins]. Se Pu 2021; 39:173-183. [PMID: 34227350 PMCID: PMC9274844 DOI: 10.3724/sp.j.1123.2020.08018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
The invention and application of pesticides have greatly increased the yield of crops, greatly contributing to ensuring people's basic livelihoods and gradually improving their livelihoods to a well-off level. However, foods, water sources, and soil, containing high levels of pesticide residues, result in increasingly serious pollution. Pesticide residues usually have the characteristics of micro toxicity, difficult biodegradation, and bioaccumulation, and thus pose serious threat to living organisms and ecosystems. In recent years, pesticide pollution has earned worldwide focus. Thus, methods for the efficient detection of trace pesticides and reduction of the harm caused by pesticide pollution are urgently required. Researchers have used catalysis, electrochemistry, membrane separation, adsorption, and other methods to enrich pesticides from complex matrices. Among these, adsorbents have attracted much attention owing to their advantages of simple operation steps, rapid treatment process, and low amounts of organic solvents required. Research on adsorption materials has always been a very active field, and is also the key to the success of separation and enrichment of pesticides from complex matrices. Development of adsorbents with the advantages of simple synthesis, environment-friendliness, high stability, and strong reusability is of great significance. There has been some progress in the field of pesticide adsorption using supramolecular compounds. Cyclodextrin is a macrocyclic compound with a cavity after crown ether, which can form inclusion complexes via host guest interactions as the main body. Cyclodextrin can also be modified by etherification, esterification, oxidation, and other chemical reactions to improve its adsorption performance. Pesticides can be classified into organic and inorganic substances. One of the most widely used inorganic fungicides is the Bordeaux solution, whose main component is Cu2+. Organic fungicides, insecticides, herbicides, and plant growth regulators are basically organic molecules, whose hydroxyl and carboxyl groups can form complexes with Cu2+. As a matrix, cyclodextrin not only increases the surface area of the materials, but also provides the binding sites of hydroxyl and carboxyl groups, which guarantees efficient enrichment of Cu2+. Organic pesticides with high polarity, high electron density, and strong hydrophobicity could be better adsorbed. In this paper, the application of cyclodextrin-based adsorbents in pesticide adsorption was reviewed, and on this basis, reference to future development directions and application prospects were provided. The adsorption capacity of individual pesticide adsorbents based on cyclodextrin, as reviewed in this paper, is not high enough. Therefore, improving the adsorption capacity is currently a major research target. Some of the above-mentioned adsorbents have unclear degradation mechanisms and can easily cause secondary pollution. Therefore, the development of environment-friendly pesticide adsorbents that are easy to regenerate is a promising research direction for the future. After adsorption, some detection methods are used to determine whether the pesticide residues are up to the standard; however, the detection instruments are expensive. Therefore, the development of a combined detection mechanism that can reduce workload and cost is a promising research direction. Finally, the development of smart cyclodextrin-based adsorbents is also an efficient and rapid method to reduce the cost of detecting residual pesticide concentrations and the risk of pesticide pollution. For example, intelligent materials, whose color changes can be observed by the naked eye, not only adsorb pesticides, but also respond according to the concentration of residual pesticides.
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Affiliation(s)
- Jinfeng Zhang
- College of Chemistry, Jilin University, Changchun 130012, China
| | - Ping Li
- College of Chemistry, Jilin University, Changchun 130012, China
| | - Jiutong Ma
- College of Chemistry, Jilin University, Changchun 130012, China
| | - Qiong Jia
- College of Chemistry, Jilin University, Changchun 130012, China
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Liu B, Ren B, Xia Y, Yang Y, Yao Y. Electrochemical degradation of safranine T in aqueous solution by Ti/PbO2 electrodes. CAN J CHEM 2020. [DOI: 10.1139/cjc-2019-0143] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The electrochemical degradation of safranine T (ST) in aqueous solution was studied. The effects of current density, initial concentration of ST, initial pH values, and Na2SO4 concentration on electrocatalytic degradation of ST in the aqueous solution by Ti/PbO2 electrode were analyzed. The experimental results showed that the electrochemical oxidization reaction of ST fitted a pseudo first order kinetics model. By using the Ti/ PbO2 electrode as the anode, 99.96% of ST can be eliminated at 120 min. It means that the electrochemical degradation of ST in aqueous solution by the Ti/PbO2 electrode was very effective. The optimal reaction conditions were as follows: current density, 40 mA cm−2; initial ST concentration, 100 mg L−1; Na2SO4 concentration, 0.20 mol L−1; initial pH, 6. It can be known from the test of UV–vis and HPLC in the reaction process that the intermediates will be generated, and the possible intermediate structure was studied by HPLC–MS test. However, with the progress of degradation reaction, the intermediates will eventually be oxidized into CO2 and H2O. Cyclic voltammetry and fluorescence experiments proved that ST was indirectly oxidized through the generation of hydroxyl radicals. Under the optimal reaction conditions, the energy required to completely remove ST was 17.92 kWh/m3.
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Affiliation(s)
- Baichen Liu
- Hebei University of Technology, School of Chemical Engineering and Technology, Tianjin 300130, P.R. China
- Hebei University of Technology, School of Chemical Engineering and Technology, Tianjin 300130, P.R. China
| | - Bingli Ren
- Hebei University of Technology, School of Chemical Engineering and Technology, Tianjin 300130, P.R. China
- Hebei University of Technology, School of Chemical Engineering and Technology, Tianjin 300130, P.R. China
| | - Yun Xia
- Hebei University of Technology, School of Chemical Engineering and Technology, Tianjin 300130, P.R. China
- Hebei University of Technology, School of Chemical Engineering and Technology, Tianjin 300130, P.R. China
| | - Yang Yang
- Hebei University of Technology, School of Chemical Engineering and Technology, Tianjin 300130, P.R. China
- Hebei University of Technology, School of Chemical Engineering and Technology, Tianjin 300130, P.R. China
| | - Yingwu Yao
- Hebei University of Technology, School of Chemical Engineering and Technology, Tianjin 300130, P.R. China
- Hebei University of Technology, School of Chemical Engineering and Technology, Tianjin 300130, P.R. China
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Wang H, Mustafa M, Yu G, Östman M, Cheng Y, Wang Y, Tysklind M. Oxidation of emerging biocides and antibiotics in wastewater by ozonation and the electro-peroxone process. CHEMOSPHERE 2019; 235:575-585. [PMID: 31276870 DOI: 10.1016/j.chemosphere.2019.06.205] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Revised: 06/19/2019] [Accepted: 06/26/2019] [Indexed: 06/09/2023]
Abstract
This study investigated the abatement of a number of antimicrobials frequently detected in municipal wastewater by conventional ozonation and a recently developed ozone-based advanced oxidation process, the electro-peroxone (E-peroxone) process. A synthetic water and a real secondary wastewater effluent were spiked with fourteen antimicrobials, including antibiotics and biocides, and then treated by the two processes. The results show that most of the antibiotics investigated (e.g., ofloxacin, trimethoprim, norfloxacin, and ciprofloxacin) readily react with ozone (O3) and could therefore be efficiently eliminated from the water matrices by direct O3 oxidation during both processes. In contrast, most of the biocides tested in this study (e.g., clotrimazole, pentamidine, bixafen, propiconazole, and fluconazole) were only moderately reactive, or non-reactive, with O3. Therefore, these biocides were removed at considerably lower rate than the antibiotics during the two ozone-based processes, with hydroxyl radical (OH) oxidation playing an important role in their abatement mechanisms. When compared with conventional ozonation, the E-peroxone process is defined by the in situ electrogeneration of hydrogen peroxide, which considerably enhances the transformation of O3 to OH. As a result, the E-peroxone process significantly accelerated the abatement of biocides and required a considerably shorter treatment time to eliminate all of the tested compounds from the water matrices than conventional ozonation. In addition, the E-peroxone process enhanced the contributions of OH fractions to the abatement of moderately ozone reactive benzotriazoles. These results demonstrate that the E-peroxone process holds promise as an effective tertiary treatment option for enhancing the abatement of ozone-resistant antimicrobials in wastewater.
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Affiliation(s)
- Huijiao Wang
- Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China; School of Environment, Beijing Key Laboratory for Emerging Organic Contaminants Control, State Key Joint Laboratory of Environmental Simulation and Pollution Control, Key Laboratory for Solid Waste Management and Environment Safety, Tsinghua University, Beijing, 100084, China
| | - Majid Mustafa
- Department of Chemistry, Umeå University, SE-90187, Umeå, Sweden.
| | - Gang Yu
- School of Environment, Beijing Key Laboratory for Emerging Organic Contaminants Control, State Key Joint Laboratory of Environmental Simulation and Pollution Control, Key Laboratory for Solid Waste Management and Environment Safety, Tsinghua University, Beijing, 100084, China
| | - Marcus Östman
- Department of Chemistry, Umeå University, SE-90187, Umeå, Sweden
| | - Yi Cheng
- Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China
| | - Yujue Wang
- School of Environment, Beijing Key Laboratory for Emerging Organic Contaminants Control, State Key Joint Laboratory of Environmental Simulation and Pollution Control, Key Laboratory for Solid Waste Management and Environment Safety, Tsinghua University, Beijing, 100084, China.
| | - Mats Tysklind
- Department of Chemistry, Umeå University, SE-90187, Umeå, Sweden
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8
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Ganiyu SO, Vieira Dos Santos E, Tossi de Araújo Costa EC, Martínez-Huitle CA. Electrochemical advanced oxidation processes (EAOPs) as alternative treatment techniques for carwash wastewater reclamation. CHEMOSPHERE 2018; 211:998-1006. [PMID: 30119031 DOI: 10.1016/j.chemosphere.2018.08.044] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2018] [Revised: 08/08/2018] [Accepted: 08/09/2018] [Indexed: 05/07/2023]
Abstract
Electrochemical advanced oxidation processes such as electrooxidation (EO), electrooxidation with hydrogen peroxide generation (EO-H2O2) and electro-Fenton process (EF) have been investigated as alternative treatment techniques for complete removal of anionic surfactants and organic matters from real carwash wastewater. The electrochemical processes were performed with acidified real carwash wastewater using boron doped anode and carbon felt cathode. In all cases, the chemical oxygen demand (COD) removal efficiency was always increased with rise in applied current and complete organic matter decay was achieved at applied current of 500 mA or above after 6 h of electrolysis. Faster and higher COD decay was observed with EF compared to either EO or EO-H2O2 treatment, at all currents and electrolysis time. Besides, complete degradation of anionic surfactants - the major organic content of the wastewater could be achieved at all applied currents studied irrespective of the process used, indicating the efficacy of processes for total remediation of real carwash wastewater. The short-chain carboxylic acids formed as the final organic byproducts were identified and quantified by ion-exclusion chromatography. More so, lower energy consumption and higher current efficiency were achieved with EF compared to EO-H2O2. Electrochemical treatment was found to be a powerful technology for the complete abatement of organic matter in carwash wastewater for possible reuse.
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Affiliation(s)
- Soliu O Ganiyu
- Institute of Chemistry, Federal University of Rio Grande do Norte, Lagoa Nova, CEP 59078-970, Natal, RN, Brazil.
| | - Elisama Vieira Dos Santos
- Science and TechnologySchool, Federal University of Rio Grande do Norte, Lagoa Nova, CEP 59078-970, Natal, RN, Brazil
| | | | - Carlos A Martínez-Huitle
- Institute of Chemistry, Federal University of Rio Grande do Norte, Lagoa Nova, CEP 59078-970, Natal, RN, Brazil; National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM), Institute of Chemistry, Unesp, P.O. Box 355, 14800-900 Araraquara, SP, Brazil.
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Vidal J, Huiliñir C, Santander R, Silva-Agredo J, Torres-Palma RA, Salazar R. Effective removal of the antibiotic Nafcillin from water by combining the Photoelectro-Fenton process and Anaerobic Biological Digestion. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 624:1095-1105. [PMID: 29625524 DOI: 10.1016/j.scitotenv.2017.12.159] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Revised: 12/11/2017] [Accepted: 12/14/2017] [Indexed: 05/03/2023]
Abstract
The elimination of the antibiotic Nafcillin (NAF), which is usually used in hospitals and veterinary clinics around the world, was assessed through a combination of three advanced electrochemical oxidation processes followed by anaerobic digestion process. In the first stage different electrochemical advanced oxidation processes (EAOPs) were used: electro-oxidation with hydrogen peroxide (EO-H2O2), electro-Fenton (EF) and Photo electro-Fenton (PEF). After PEF, almost complete and highly efficient degradation and elimination of NAF was achieved, with the concomitant elimination of the associated antimicrobial activity. The fast degradation rate produced by PEF is explained by the oxidative action of hydroxyl radicals (•OH) together with the direct UV photolysis of complexes formed between Fe3+ and some organic intermediates. Total removal of NAF occurs after 90min of electrolysis by PEF, with the generation of organic intermediates that remain in solution. However, when this post PEF process solution was treated with an anaerobic biological process, the intermediates generated in the electrochemical degradation of NAF were completely eliminated after 24h. The kinetic degradation of NAF as well as the identification/quantification of products and intermediates formed during the degradation of antibiotic, such as inorganic ions, carboxylic acids and aromatic compounds, were determined by chromatographic and photometric methods. Finally, an oxidation pathway is proposed for the complete conversion to CO2.
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Affiliation(s)
- Jorge Vidal
- Laboratorio de Electroquímica del Medio Ambiente (LEQMA), Departamento de Química de los Materiales, Facultad de Química y Biología, Universidad de Santiago de Chile (USACH), Casilla 40, Correo 33, Santiago, Chile
| | - Cesar Huiliñir
- Departamento de Ingeniería Química, Laboratorio de Biotecnología Ambiental, Facultad de Ingeniería, Universidad de Santiago de Chile (USACH), Chile
| | - Rocío Santander
- Laboratorio de Electroquímica del Medio Ambiente (LEQMA), Departamento de Química de los Materiales, Facultad de Química y Biología, Universidad de Santiago de Chile (USACH), Casilla 40, Correo 33, Santiago, Chile
| | - Javier Silva-Agredo
- Grupo de Investigación en Remediación Ambiental y Biocatálisis, Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, Colombia
| | - Ricardo A Torres-Palma
- Grupo de Investigación en Remediación Ambiental y Biocatálisis, Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, Colombia.
| | - Ricardo Salazar
- Laboratorio de Electroquímica del Medio Ambiente (LEQMA), Departamento de Química de los Materiales, Facultad de Química y Biología, Universidad de Santiago de Chile (USACH), Casilla 40, Correo 33, Santiago, Chile.
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10
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Salazar R, Ureta-Zañartu MS, González-Vargas C, Brito CDN, Martinez-Huitle CA. Electrochemical degradation of industrial textile dye disperse yellow 3: Role of electrocatalytic material and experimental conditions on the catalytic production of oxidants and oxidation pathway. CHEMOSPHERE 2018; 198:21-29. [PMID: 29421732 DOI: 10.1016/j.chemosphere.2017.12.092] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Revised: 12/13/2017] [Accepted: 12/14/2017] [Indexed: 05/15/2023]
Abstract
This study aimed to verify the efficiency of the electrochemical oxidation process for removal the industrial textile Disperse Yellow 3 (DY3) dye in aqueous solutions using different electrocatalytic materials: boron-doped diamond (BDD), Ti/Ru0.3Ti0.7O2 and Ti/Pt anodes. The results were obtained by applying different current densities (40 and 60 mA cm-2) at 40 °C using different supporting electrolytes (Na2SO4 50 mM and NaCl 50 mM) under values of pH about 2.3, 7.0 and 10.0. Results obtained shown that the process was faster at the beginning of the process for all electrocatalytic materials, using Na2SO4 as electrolyte, being more efficient for BDD anode reaching more than 90% of TOC and color decay independently of the current density and pH and supporting electrolyte; while up to 50% of color and TOC was eliminated, using the other anodic materials in sulfate. In NaCl medium a complete mineralization was achieved at Ti/Ru0.3Ti0.7O2 at short electrolysis time, followed by BDD and Ti/Pt. The corresponding kinetic analysis confirms these results. Trends of active chlorine species synthesized at Ti/Ru0.3Ti0.7O2, BDD and Ti/Pt anodes, at different pH conditions, demonstrated that, the concentration of active chlorine species depends on the pH conditions and electrode material. Finally, a cost comparison for each electrocatalytic material under different experimental conditions was realized exhibiting the lowest energy consumption and electrolysis time in NaCl medium. Based on the results obtained, the electrochemical elimination of dye and the profile of the carboxylic by-products formed depend on the nature of material, pH and supporting electrolyte.
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Affiliation(s)
- Ricardo Salazar
- Facultad de Química y Biología, Universidad de Santiago de Chile, USACh, Casilla 40, Correo 33, Santiago, Chile.
| | - M Soledad Ureta-Zañartu
- Facultad de Química y Biología, Universidad de Santiago de Chile, USACh, Casilla 40, Correo 33, Santiago, Chile
| | - Camilo González-Vargas
- Facultad de Química y Biología, Universidad de Santiago de Chile, USACh, Casilla 40, Correo 33, Santiago, Chile
| | | | - Carlos A Martinez-Huitle
- Federal University of Rio Grande do Norte, Institute of Chemistry Lagoa Nova, CEP 59.072-970, RN, Brazil
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11
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Huang YF, Liu QH, Li K, Li Y, Chang N. Magnetic iron(III)-based framework composites for the magnetic solid-phase extraction of fungicides from environmental water samples. J Sep Sci 2018; 41:1129-1137. [DOI: 10.1002/jssc.201700927] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Revised: 11/18/2017] [Accepted: 12/03/2017] [Indexed: 01/13/2023]
Affiliation(s)
- Yan-Feng Huang
- State Key Laboratory of Separation Membranes and Membrane Processes; and College of Environmental and Chemical Engineering; Tianjin Polytechnic University; Tianjin China
| | - Qiao-Huan Liu
- State Key Laboratory of Separation Membranes and Membrane Processes; and College of Environmental and Chemical Engineering; Tianjin Polytechnic University; Tianjin China
| | - Kang Li
- State Key Laboratory of Separation Membranes and Membrane Processes; and College of Environmental and Chemical Engineering; Tianjin Polytechnic University; Tianjin China
| | - Ying Li
- State Key Laboratory of Separation Membranes and Membrane Processes; and College of Environmental and Chemical Engineering; Tianjin Polytechnic University; Tianjin China
| | - Na Chang
- State Key Laboratory of Separation Membranes and Membrane Processes; and College of Environmental and Chemical Engineering; Tianjin Polytechnic University; Tianjin China
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Martín de Vidales MJ, Millán M, Sáez C, Cañizares P, Rodrigo MA. Irradiated-assisted electrochemical processes for the removal of persistent pollutants from real wastewater. Sep Purif Technol 2017. [DOI: 10.1016/j.seppur.2016.11.014] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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13
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Cruz-Rizo A, Gutiérrez-Granados S, Salazar R, Peralta-Hernández JM. Application of electro-Fenton/BDD process for treating tannery wastewaters with industrial dyes. Sep Purif Technol 2017. [DOI: 10.1016/j.seppur.2016.08.029] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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14
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Espinoza C, Romero J, Villegas L, Cornejo-Ponce L, Salazar R. Mineralization of the textile dye acid yellow 42 by solar photoelectro-Fenton in a lab-pilot plant. JOURNAL OF HAZARDOUS MATERIALS 2016; 319:24-33. [PMID: 26971051 DOI: 10.1016/j.jhazmat.2016.03.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2015] [Revised: 03/01/2016] [Accepted: 03/02/2016] [Indexed: 06/05/2023]
Abstract
A complete mineralization of a textile dye widely used in the Chilean textile industry, acid yellow 42 (AY42), was studied. Degradation was carried out in an aqueous solution containing 100mgL(-1) of total organic carbon (TOC) of dye using the advanced solar photoelectro-Fenton (SPEF) process in a lab-scale pilot plant consisting of a filter press cell, which contains a boron doped diamond electrode and an air diffusion cathode (BDD/air-diffusion cell), coupled with a solar photoreactor for treat 8L of wastewater during 270min of electrolysis. The main results obtained during the degradation of the textile dye were that a complete transformation to CO2 depends directly on the applied current density, the concentration of Fe(2+) used as catalyst, and the solar radiation intensity. The elimination of AY42 and its organic intermediates was due to hydroxyl radicals formed at the anode surface from water oxidation and in the bulk from Fenton's reaction between electrogenerated H2O2 and added Fe(2+). The application of solar radiation in the process (SPEF) yield higher current efficiencies and lower energy consumptions than electro-Fenton (EF) and electro-oxidation with electrogenerated H2O2 (E OH2O2) by the additional production of hydroxyl radicals from the photolysis of Fe(III) hydrated species and the photodecomposition of Fe(III) complexes with organic intermediates. Moreover, some products and intermediates formed during mineralization of dye, such as inorganic ions, carboxylic acids and aromatic compounds were determined by photometric and chromatographic methods. An oxidation pathway is proposed for the complete conversion to CO2.
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Affiliation(s)
- Carolina Espinoza
- Laboratorio de Electroquímica MedioAmbiental, LEQMA, Departamento de Química de los, Materiales Facultad de Química y Biología, Chile
| | - Julio Romero
- Departamento de Ingeniería Química, Laboratorio de procesos de Separación por membranas, Facultad de Ingeniería, Chile
| | - Loreto Villegas
- Departamento de Ciencias del Ambiente, Facultad de Química y Biología. Universidad de Santiago de Chile, USACH, Casilla 40, Correo 33, Santiago, Chile
| | - Lorena Cornejo-Ponce
- Laboratorio de Investigaciones Medioambientales de Zonas Áridas, LIMZA, Universidad de Tarapacá, UTA, Chile
| | - Ricardo Salazar
- Laboratorio de Electroquímica MedioAmbiental, LEQMA, Departamento de Química de los, Materiales Facultad de Química y Biología, Chile.
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Removal of organic matter contained in slaughterhouse wastewater using a combination of anaerobic digestion and solar photoelectro-Fenton processes. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.05.064] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Electrochemical degradation of Acid Blue 113 dye using TiO 2 -nanotubes decorated with PbO 2 as anode. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.enmm.2015.11.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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Vidal J, Villegas L, Peralta-Hernández JM, Salazar González R. Removal of Acid Black 194 dye from water by electrocoagulation with aluminum anode. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2016; 51:289-296. [PMID: 26745322 DOI: 10.1080/10934529.2015.1109385] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Application of an electrocoagulation process (EC) for the elimination of AB194 textile dye from synthetic and textile wastewater (effluent) contaminated with AB194 dye, was carried out using aluminum anodes at two different initial pH values. Tafel studies in the presence and absence of the dye were performed. The aluminum species formed during the electrolysis were quantified by atomic absorption, and the flocs formed in the process were analyzed by HPLC-MS. Complete removal of AB194 from 1.0 L of solution was achieved applying low densities current at initial pH values of 4.0 and 8.0. The removal of AB194 by EC was possible with a short electrolysis time, removing practically 100% of the total organic carbon content and chemical oxygen demand. The final result was completely discolored water lacking dye and organic matter. An effluent contaminated with 126 mg L(-1) AB194 dye from a Chilean textile industry was also treated by EC under optimized experimental conditions, yielding discolored water and considerably decreasing the presence of organic compounds (dye + dyeing additives), with very low concentrations of dissolved Al(3+). Analysis of flocs showed the presence of the original dye without changes in its chemical structure.
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Affiliation(s)
- Jorge Vidal
- a Department of Materials Chemistry, Laboratory of Environmental Electrochemistry, LEQMA, Faculty of Chemistry and Biology , Santiago , Chile
| | - Loreto Villegas
- b Department of Environmental Sciences , Faculty of Chemistry and Biology, Santiago, University of Santiago of Chile, USACH , Correo , Santiago , Chile
| | - Juan M Peralta-Hernández
- c University of Guanajuato, Division of Natural and Exact Sciences , Department of Chemistry , Guanajuato , México
| | - Ricardo Salazar González
- a Department of Materials Chemistry, Laboratory of Environmental Electrochemistry, LEQMA, Faculty of Chemistry and Biology , Santiago , Chile
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Garcia-Segura S, Keller J, Brillas E, Radjenovic J. Removal of organic contaminants from secondary effluent by anodic oxidation with a boron-doped diamond anode as tertiary treatment. JOURNAL OF HAZARDOUS MATERIALS 2014; 283:551-557. [PMID: 25464295 DOI: 10.1016/j.jhazmat.2014.10.003] [Citation(s) in RCA: 145] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2014] [Revised: 10/03/2014] [Accepted: 10/05/2014] [Indexed: 06/04/2023]
Abstract
Electrochemical advanced oxidation processes (EAOPs) have been widely investigated as promising technologies to remove trace organic contaminants from water, but have rarely been used for the treatment of real waste streams. Anodic oxidation with a boron-doped diamond (BDD) anode was applied for the treatment of secondary effluent from a municipal sewage treatment plant containing 29 target pharmaceuticals and pesticides. The effectiveness of the treatment was assessed from the contaminants decay, dissolved organic carbon and chemical oxygen demand removal. The effect of applied current and pH was evaluated. Almost complete mineralization of effluent organic matter and trace contaminants can be obtained by this EAOP primarily due to the action of hydroxyl radicals formed at the BDD surface. The oxidation of Cl(-) ions present in the wastewater at the BDD anode gave rise to active chlorine species (Cl2/HClO/ClO(-)), which are competitive oxidizing agents yielding chloramines and organohalogen byproducts, quantified as adsorbable organic halogen. However, further anodic oxidation of HClO/ClO(-) species led to the production of ClO3(-) and ClO4(-) ions. The formation of these species hampers the application as a single-stage tertiary treatment, but posterior cathodic reduction of chlorate and perchlorate species may reduce the risks associated to their presence in the environment.
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Affiliation(s)
- Sergi Garcia-Segura
- Advanced Water Management Centre, The University of Queensland, Level 4, Gehrmann Bld. (60), St Lucia, QLD 072, Australia; Laboratori d'Electroquímica dels Materials i del Medi Ambient, Departament de Química Física, Facultat de Química, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain.
| | - Jürg Keller
- Advanced Water Management Centre, The University of Queensland, Level 4, Gehrmann Bld. (60), St Lucia, QLD 072, Australia
| | - Enric Brillas
- Laboratori d'Electroquímica dels Materials i del Medi Ambient, Departament de Química Física, Facultat de Química, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain
| | - Jelena Radjenovic
- Advanced Water Management Centre, The University of Queensland, Level 4, Gehrmann Bld. (60), St Lucia, QLD 072, Australia.
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Han W, Zhong C, Liang L, Sun Y, Guan Y, Wang L, Sun X, Li J. Electrochemical degradation of triazole fungicides in aqueous solution using TiO2-NTs/SnO2-Sb/PbO2 anode: Experimental and DFT studies. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.02.119] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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