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Castañeda LF, García I, Nava JL, Coreño O. Concurrent arsenic, fluoride, and hydrated silica removal from deep well water by electrocoagulation: Comparison of sacrificial anodes (Al, Fe, and Al-Fe). JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 365:121597. [PMID: 38941855 DOI: 10.1016/j.jenvman.2024.121597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 06/08/2024] [Accepted: 06/23/2024] [Indexed: 06/30/2024]
Abstract
Some studies have reported the removal of As (As) and fluoride (F-) using different sacrificial anodes; however, they have been tested with a synthetic solution in a batch system without hydrated silica (SiO2) interaction. Due to the above, concurrent removal of As, F-, and SiO2 from natural deep well water was evaluated (initial concentration: 35.5 μg L-1 As, 1.1 mg L-1F-, 147 mg L-1 SiO2, pH 8.6, and conductivity 1024 μS cm-1), by electrocoagulation (EC) process in continuous mode comparing three different configurations of sacrificial anodes (Al, Fe, and Al-Fe). EC was performed in a new reactor equipped with a small flow distributor and turbulence promoter at the entrance of the first channel to homogenize the flow. The best removal was found at j = 5 mA cm-2 and u = 1.3 cm s-1, obtaining arsenic residual concentrations (CAs) of 1.33, 0.45, and 0.77 μg L-1, fluoride residual concentration ( [Formula: see text] ) of 0.221, 0.495, and 0.622 mg L-1, and hydrated silica residual concentration ( [Formula: see text] ) of 21, 34, and 56 mg L-1, with costs of approximately 0.304, 0.198, and 0.228 USD m-3 for the Al, Fe and Al-Fe anodes, respectively. Al anode outperforms Fe and Al-Fe anodes in concurrently removing As, F- and SiO2. The residual concentrations of As and F- complied with the recommendations of the World Health Organization (WHO) (As < 10 μg L-1 and F- < 1 mg L-1). The spectroscopic analyses of the Al, Fe, and Al-Fe aggregates showed the formation of aluminosilicates, iron oxyhydroxides and oxides, and calcium and sodium silicates involved in removing As, F-, and SiO2. It is concluded that Al would serve as the most suitable sacrificial anode.
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Affiliation(s)
- Locksley F Castañeda
- CONAHCYT -University of Guanajuato, Department of Geomatic and Hydraulic Engineering, Av. Juárez 77, Centro, 36000, Guanajuato, Guanajuato, Mexico.
| | - Ivonne García
- University of Guanajuato, Department of Geomatic and Hydraulic Engineering, Av. Juárez 77, Centro, 36000, Guanajuato, Guanajuato, Mexico.
| | - José L Nava
- University of Guanajuato, Department of Geomatic and Hydraulic Engineering, Av. Juárez 77, Centro, 36000, Guanajuato, Guanajuato, Mexico.
| | - Oscar Coreño
- University of Guanajuato, Department of Civil Engineering, Av. Juárez 77, Centro, 36000, Guanajuato, Guanajuato, Mexico.
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Bi J, Xing S, Shan G, Zhao Y, Ji Z, Zhu D, Hao H. Electro-intensified simultaneous decontamination of coexisting pollutants in wastewater. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 904:166949. [PMID: 37696408 DOI: 10.1016/j.scitotenv.2023.166949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 08/16/2023] [Accepted: 09/07/2023] [Indexed: 09/13/2023]
Abstract
The treatment of wastewater has become increasingly challenging as a result of its growing complexity. To achieve synergistic removal of coexisting pollutants in wastewater, one promising approach involves the integration of electric fields. We conducted a comprehensive literature review to explore the potential of integrating electric fields and developing efficient electro-intensified simultaneous decontamination systems for wastewater containing coexisting pollutants. The review focused on comprehending the applications and mechanisms of these systems, with a particular emphasis on the deliberate utilization of positive and negative charges. After analyzing the advantages, disadvantages, and application efficacy of these systems, we observed electro-intensified systems exhibit flexible potential through their rational combination, allowing for an expanded range of applications in addressing simultaneous decontamination challenges. Unlike the reviews focusing on single elimination, this work aims to provide guidance in addressing the environmental problems resulting from the coexistence of hazardous contaminants.
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Affiliation(s)
- Jingtao Bi
- Engineering Research Center of Seawater Utilization of Ministry of Education, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
| | - Siyang Xing
- Engineering Research Center of Seawater Utilization of Ministry of Education, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
| | - Guoqiang Shan
- Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Yingying Zhao
- Engineering Research Center of Seawater Utilization of Ministry of Education, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
| | - Zhiyong Ji
- Engineering Research Center of Seawater Utilization of Ministry of Education, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
| | - Dongyang Zhu
- Department of Chemical and Biomolecular Engineering, Rice University, TX 77005, United States
| | - Hongxun Hao
- National Engineering Research Center of Industry Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.
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Jiang C, Liu Y, Zhang C, Li X. Study on influencing parameters and long-term operation of electrocoagulation phosphorus removal from small rural domestic sewage. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2023; 87:1866-1878. [PMID: 37119160 DOI: 10.2166/wst.2023.112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
Excessive discharge of phosphorus can produce eutrophication in aquatic environments, damaging public health, the living environment, and the economy. The conventional mechanical-biological phosphorus removal methods are not suitable for small rural domestic sewage due to the features of small scale, scattered distribution, intermittent emission, and large fluctuation. This work evaluated electrocoagulation (EC) with industrial steel as electrodes on small rural domestic sewage. Results showed that the best performance was achieved at a current density of 1 mA/cm2, electrode distance of 2 cm, electrode number of 2, pH of 7, and Hydraulic Retention Time of 30 min, respectively. Under optimum conditions, the EC process removed 93.91% phosphorus while consuming around 0.25 kWh/m3 of electricity. In addition, the electrode passivation of EC was further investigated; the long-term research found that the phosphorus removal efficiency only decreased by 4.34% after 10 days of continuous flow operation, and the operational energy consumption was 0.07 kWh/m3 at a Cl- concentration of 500 mg/L.
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Affiliation(s)
- Chunfeng Jiang
- School of Energy and Environment, Southeast University, Nanjing 210096, China E-mail:
| | - Yanqing Liu
- School of Energy and Environment, Southeast University, Nanjing 210096, China E-mail:
| | - Chong Zhang
- School of Energy and Environment, Southeast University, Nanjing 210096, China E-mail:
| | - Xianning Li
- School of Energy and Environment, Southeast University, Nanjing 210096, China E-mail:
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4
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Venegas-García DJ, Wilson LD. Kinetics and Thermodynamics of Adsorption for Aromatic Hydrocarbon Model Systems via a Coagulation Process with a Ferric Sulfate-Lime Softening System. MATERIALS (BASEL, SWITZERLAND) 2023; 16:655. [PMID: 36676392 PMCID: PMC9867294 DOI: 10.3390/ma16020655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 01/05/2023] [Accepted: 01/08/2023] [Indexed: 06/17/2023]
Abstract
The adsorption mechanisms for model hydrocarbons, 4-nitrophenol (PNP), and naphthalene were studied in a coagulation-based process using a ferric sulfate-lime softening system. Kinetic and thermodynamic adsorption parameters for this system were obtained under variable ionic strength and temperature. An in situ method was used to investigate kinetic adsorption profiles for PNP and naphthalene, where a pseudo-first order kinetic model adequately described the process. Thermodynamic parameters for the coagulation of PNP and naphthalene reveal an endothermic and spontaneous process. River water was compared against lab water samples at optimized conditions, where the results reveal that ions in the river water decrease the removal efficiency (RE; %) for PNP (RE = 28 to 20.3%) and naphthalene (RE = 89.0 to 80.2%). An aluminum sulfate (alum) coagulant was compared against the ferric system. The removal of PNP with alum decreased from RE = 20.5% in lab water and to RE = 16.8% in river water. Naphthalene removal decreased from RE = 89.0% with ferric sulfate to RE = 83.2% with alum in lab water and from RE = 80.2% for the ferric system to RE = 75.1% for alum in river water. Optical microscopy and dynamic light scattering of isolated flocs corroborated the role of ions in river water, according to variable RE and floc size distribution.
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Affiliation(s)
| | - Lee D. Wilson
- Correspondence: ; Tel.: +1-306-966-2961; Fax: +1-306-966-4730
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Ru J, Wang X, Zhao J, Yang J, Zhou Z, Du X, Lu X. Evaluation and development of GO/UiO-67@PtNPs nanohybrid-based electrochemical sensor for invisible arsenic (III) in water samples. Microchem J 2022. [DOI: 10.1016/j.microc.2022.107765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Goren AY, Kobya M, Khataee A. How does arsenic speciation (arsenite and arsenate) in groundwater affect the performance of an aerated electrocoagulation reactor and human health risk? THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 808:152135. [PMID: 34864021 DOI: 10.1016/j.scitotenv.2021.152135] [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: 08/03/2021] [Revised: 11/21/2021] [Accepted: 11/28/2021] [Indexed: 06/13/2023]
Abstract
Arsenic (As) occurrence in water resources has become one of the most critical environmental problems worldwide. The detrimental health impacts on humans have been reported due to the consumption of As-contaminated groundwater resources. Consumption of As-containing water over the long term can cause arsenicosis and chronic effects on human health due to its toxicity. Several treatment processes are available for As removals such as coagulation, ion exchange, adsorption, and membrane technologies but they have various major drawbacks. In the present work, therefore, an aerated electrocoagulation (EC) system with aluminum anodes was operated for simultaneous arsenate (As(V)) and arsenite (As(III)) removal to overcome the disadvantages of other processes such as, sludge formation, difficulties in operation, high operating costs, high energy consumption, and the requirement of pre-treatment process and to enhance the conventional EC process. The combined effects of the applied current (0.075-0.3 A), aeration rate (0-6 L/min), pH (6.5-8.5), and As speciation (As(V)-As(III)) were studied on As removal efficiency. The findings revealed that As removal mostly depended on the airflow rate and the applied current in the EC system. The highest As removal efficiency (99.1%) was obtained at an airflow rate of 6 L/min, a pH of 6.5, an initial As (V) concentration of 200 μg/L, and a current of 0.3 A, with an energy consumption of 2.85 kWh/m3 and an operating cost of 0.66 $/m3. The human health risk assessment of treated water was also examined to understand the performance of the EC system. At most of the experimental runs, the chronic toxic risk (CTR) and carcinogenic risk (CR) of As were within the permissible limits except for an airflow rate of 0-2 L/min, an initial pH of 8.5, and a current of 0.075-0.15 A for high initial As (III) concentrations. Overall, the As removal performance and groundwater risk assessment show that the EC process is a promising option for industrial applications.
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Affiliation(s)
- Aysegül Yagmur Goren
- Izmir Institute of Technology, Department of Environmental Engineering, 35430 Izmir, Turkey
| | - Mehmet Kobya
- Gebze Technical University, Department of Environmental Engineering, 41400 Kocaeli, Turkey; Kyrgyz-Turkish Manas University, Department of Environmental Engineering, 720000 Bishkek, Kyrgyzstan
| | - Alireza Khataee
- Gebze Technical University, Department of Environmental Engineering, 41400 Kocaeli, Turkey; Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, 51666-16471 Tabriz, Iran.
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Liu M, Huang Q, Li L, Zhu G, Yang X, Wang S. Cerium-doped MIL-101-NH 2(Fe) as superior adsorbent for simultaneous capture of phosphate and As(V) from Yangzonghai coastal spring water. JOURNAL OF HAZARDOUS MATERIALS 2022; 423:126981. [PMID: 34474358 DOI: 10.1016/j.jhazmat.2021.126981] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 08/13/2021] [Accepted: 08/19/2021] [Indexed: 06/13/2023]
Abstract
A series of novel cerium-doped MIL-101-NH2 materials were synthesized using the solvothermal method for the simultaneous efficient removal of phosphate and As(V). According to the characterization results, cerium was successfully loaded onto MIL-101-NH2 and that Ce-MOFs might be generated during the loading process, which modified the crystal structure of MIL-101-NH2 and resulted in MOFs with different microstructures. In single-uptake systems containing only phosphate or As(V), isothermal adsorption experiments showed that 1Ce-MIL-101-NH2 exhibited better adsorption properties of phosphate and As(V) than MIL-101-NH2. Furthermore, the uptake amounts of phosphate and As(V) reached 341.5 mg/g and 249 mg/g, respectively. Superior uptake amounts for binary phosphate (167.36 mg/g) and As(V) (87.55 mg/g) were achieved with 1Ce-MIL-101-NH2. Kinetic experiments revealed a higher uptake rate of phosphate than of As(V). FT-IR and XPS analyses showed that the main mechanism for the removal of phosphate and As(V) from water by 1Ce-MIL-101-NH2 was the formation of an Fe/CeOP inner complex through ligand complexation and electrostatic attraction. Furthermore, 1Ce-MIL-101-NH2 exhibited high selectivity and excellent efficiency in removing phosphate and As(V) in contaminated spring water in the presence of competing anions; this further confirms the application potential of the novel adsorbent.
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Affiliation(s)
- Meng Liu
- Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University), Ministry Education, School of Chemical Science and Technology, Yunnan University, Kunming, China
| | - Qilan Huang
- Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University), Ministry Education, School of Chemical Science and Technology, Yunnan University, Kunming, China
| | - Li Li
- Scenic Area Management Committee of Yangzonghai, Kunming, China
| | - Guiping Zhu
- Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University), Ministry Education, School of Chemical Science and Technology, Yunnan University, Kunming, China
| | - Xiangjun Yang
- Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University), Ministry Education, School of Chemical Science and Technology, Yunnan University, Kunming, China.
| | - Shixiong Wang
- Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University), Ministry Education, School of Chemical Science and Technology, Yunnan University, Kunming, China
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8
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Abatement of As and hydrated silica from natural groundwater by electrocoagulation in a continuous plant having an electrolyzer and a flocculator-settler. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.119895] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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9
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Zeng J, Ji M, Zhao Y, Helmer Pedersen T, Wang H. Optimization of electrocoagulation process parameters for enhancing phosphate removal in a biofilm-electrocoagulation system. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2021; 83:2560-2574. [PMID: 34032631 DOI: 10.2166/wst.2021.132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
This study aimed to enhance the removal of phosphate in synthetic rural sewage by using a continuous electrocoagulation (EC) combined with biofilm process in an integrated system. Characteristic indexes of biofilm process effluent covering pH, dissolved oxygen (DO), suspended solids (SS), chemical oxygen demand (COD) and phosphate maintained a narrow fluctuation range and tended not readily to influence the phosphate removal of subsequent electrocoagulation. Three parameters including inter-electrode distance, current intensity and reaction time were selected to investigate the performance of enhancing phosphate removal. On the strength of single-factor tests, the Box-Behnken design (BBD) coupled with response surface methodology (RSM) was applied to investigate the individual and mutual interaction impacts of the major operating parameters and to optimize conditions. The optimum conditions were found to be inter-electrode distance of 1.8 cm, current density of 2.1 mA/cm2 and EC reaction time of 34 min, and phosphate removal efficiency of 90.24% was achieved along with less than 1 mg/L in case of periodic polarity switching mode, which raised removal efficiency by 10.10% and reduced operating cost by 0.13 CNY/g PO4- compared to non-switching mode. The combination of biofilm processing and electrocoagulation treatment was proven to be a valid and feasible method for enhancing phosphate removal.
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Affiliation(s)
- Jie Zeng
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China E-mail:
| | - Min Ji
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China E-mail:
| | - Yingxin Zhao
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China E-mail:
| | - Thomas Helmer Pedersen
- Aalborg University, Department of Energy Technology, Pontoppidanstraede 111, DK-9220 Aalborg, Denmark
| | - Hao Wang
- Tianjin Water Engineering Co., Ltd, Tianjin, 300222, China
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10
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Clematis D, Panizza M. Solid polymer electrolyte as an alternative approach for the electrochemical removal of herbicide from groundwater. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.138127] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Kim S, Kim HB, Kwon EE, Baek K. Mitigating translocation of arsenic from rice field to soil pore solution by manipulating the redox conditions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 762:143124. [PMID: 33127142 DOI: 10.1016/j.scitotenv.2020.143124] [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: 07/04/2020] [Revised: 10/06/2020] [Accepted: 10/13/2020] [Indexed: 06/11/2023]
Abstract
Arsenic (As) is uptaken more readily by rice over wheat and barley. The exposure of As to humans being in the rice-consuming regions is a serious issue. Thus, an effective practice to reduce the translocation of As from soil to rice grain should be implemented. During a flooding period, the water layer greatly limits the transport of oxygen from atmosphere to soil, which provides favorable conditions for reduction of oxygen. The reduction of Fe in the soil during the flooding condition is closely related to the As mobility, which expedites the release of As to the soil pore solution and increases As uptake by rice plants. Therefore, the performance of oxygen releasing compounds (ORCs) was evaluated to lower the translocation of As from soil to soil solution. Specifically, in the simple system containing ORCs and water, the oxygen releasing capacity of ORCs was scrutinized. In addition, ORCs was applied to sea sand and arsenic bearing ferrihydrite to identify the contribution of ORCs to As and iron mobility. Especially, ORCs were introduced to the closed (completely mixed system) and open (static) systems to simulate the paddy soil environment. Introducing ORCs increased the DO in the aqueous phase, and CaO2 was more effective in increasing DO than MgO2. In the static system simulating a rice field, the dissolution of ORCs was inhibited. The pH increased due to the formation of hydroxide, but the increase was not significant in the soil due to the buffering capacity of the soil. Finally, the As concentration in the soil solution was lowered to 25-50% of that of the control system by application of ORCs in the static paddy soil system. All experimental findings signify that the application of ORCs can be an effective practice to lower the translocation of As from soil to pore solution.
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Affiliation(s)
- Seonhee Kim
- Department of Environmental Engineering and Soil Environment Research Center, Jeonbuk National University, Jeonju, Jeollabukdo 57896, Republic of Korea
| | - Hye-Bin Kim
- Department of Environmental Engineering and Soil Environment Research Center, Jeonbuk National University, Jeonju, Jeollabukdo 57896, Republic of Korea; Department of Environment & Energy and Soil Environment Research Center, Jeonbuk National University, Jeonju, Jeollabukdo 57896, Republic of Korea
| | - Eilhann E Kwon
- Department of Environment and Energy, Sejong University, Seoul 05005, Republic of Korea
| | - Kitae Baek
- Department of Environmental Engineering and Soil Environment Research Center, Jeonbuk National University, Jeonju, Jeollabukdo 57896, Republic of Korea; Department of Environment & Energy and Soil Environment Research Center, Jeonbuk National University, Jeonju, Jeollabukdo 57896, Republic of Korea.
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12
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Sandoval MA, Fuentes R, Thiam A, Salazar R. Arsenic and fluoride removal by electrocoagulation process: A general review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 753:142108. [PMID: 33207438 DOI: 10.1016/j.scitotenv.2020.142108] [Citation(s) in RCA: 52] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Revised: 08/20/2020] [Accepted: 08/29/2020] [Indexed: 06/11/2023]
Abstract
The environmental sector has expressed a growing interest in using electrocoagulation (EC) to treat groundwater/wastewater for drinking/recycling purposes. In the EC process, the electro-dissolution of sacrificial metallic anodes through direct application of current/cell potential dissolves the metals, which precipitate as oxides and hydroxides depending on the electrolyte pH. These particles have large surface areas and can remove pollutants by coagulation. The EC process has been considered an alternative technology due to its versatility, efficiency, low cost, and environmental compatibility. Unfortunately, the lack of knowledge about scaling-up this process has limited its implementation at the industrial scale. The aim of this study is to provide a review of the EC process used for removing arsenic and fluoride from groundwater and wastewater. Approximately 80 published studies were reviewed for this paper. The fundamentals of the EC process and importance of its operating conditions, i.e., electrode material, current density, supporting electrolyte, and pH, are reported in this paper. Additionally, overview of floc characterization and energy consumption are also presented. Finally, this paper also discusses the future perspectives.
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Affiliation(s)
- Miguel A Sandoval
- Universidad de Santiago de Chile USACH, Facultad de Química y Biología, Departamento de Química de los Materiales, Laboratorio de Electroquímica Medio Ambiental, LEQMA, Casilla 40, Correo 33, Santiago, Chile; Universidad de Guanajuato, División de Ciencias Naturales y Exactas, Departamento de Ingeniería Química, Noria Alta S/N, 36050, Guanajuato, Guanajuato, Mexico.
| | - Rosalba Fuentes
- Universidad de Guanajuato, División de Ciencias Naturales y Exactas, Departamento de Ingeniería Química, Noria Alta S/N, 36050, Guanajuato, Guanajuato, Mexico
| | - Abdoulaye Thiam
- Programa Institucional de Fomento a la I+D+i, Universidad Tecnológica Metropolitana, Ignacio Valdivieso 2409, P.O. Box 8940577, San Joaquín, Santiago, Chile
| | - Ricardo Salazar
- Universidad de Santiago de Chile USACH, Facultad de Química y Biología, Departamento de Química de los Materiales, Laboratorio de Electroquímica Medio Ambiental, LEQMA, Casilla 40, Correo 33, Santiago, Chile.
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Osuna-Martínez CC, Armienta MA, Bergés-Tiznado ME, Páez-Osuna F. Arsenic in waters, soils, sediments, and biota from Mexico: An environmental review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 752:142062. [PMID: 33207489 DOI: 10.1016/j.scitotenv.2020.142062] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 08/25/2020] [Accepted: 08/27/2020] [Indexed: 06/11/2023]
Abstract
We reviewed over 226 studies dealing with arsenic (As) in water bodies (124 sites or regions; 5,834 samples), soils (44; 2,700), sediments (56; 765), rocks (6; 85), mine waste (25; 582), continental plants (17 (77 species); 571), continental animals (10 (32 species); 3,525) and aquatic organisms (27 (100 species) 2,417) in Mexico. In general, higher As concentrations were associated with specific regions in the states of Hidalgo (21 sites), San Luis Potosi (SLP) (19), Baja California Sur (15), Zacatecas (5), and Morelos (4). High As levels have been detected in drinking water in certain locations of Coahuila (up to 435 μg L-1) and Sonora (up to 1004 μg L-1); in continental surficial water in Puebla (up to 780 μg L-1) and Matehuala, SLP (up to 8684 μg L-1); in groundwater in SLP (up to 16,000 μg L-1) and Morelia, Michoacán (up to 1506,000 μg L-1); in soils in Matehuala, SLP (up to 27,945 μg g-1) and the Xichú mining area, Guanajuato (up to 62,302 μg g-1); and in sediments in Zimapán, Hidalgo (up to 11,810 μg g-1) and Matehuala, SLP (up to 28,600 μg g-1). In contaminated arid and semi-arid areas, the plants P. laevigata and A. farnesiana exhibit the highest As levels. These findings emphasize the human and environmental risks associated with the presence of As in such regions. A synthesis of the available techniques for the removal of As in water and the remediation technologies for As contaminated soils and sediments is given. The As occurrence, origin (geogenic, thermal, mining and anthropogenic) and evolution in specific regions is summarized. Also, the mobilization and mechanisms to explain the As variability in continental environments are concisely given. For future research, a stratified regional sampling is proposed which prioritizes critical sites for waters, soils and sediments, and biota, considering the subpopulation of foods from agriculture, livestock, and seafood. It is concluded that more detailed and comprehensive studies concerning pollution levels, as well as As trends, transfer, speciation, and toxic effects are still required.
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Affiliation(s)
- C Cristina Osuna-Martínez
- Facultad de Ciencias del Mar, Universidad Autónoma de Sinaloa, Paseo Claussen s/n Col. Centro, Mazatlán 82000, Sinaloa, Mexico
| | - María Aurora Armienta
- Universidad Nacional Autónoma de México, Instituto de Geofísica, Ciudad Universitaria, Delegación Coyoacán, 04360 México, D.F., Mexico; Member of El Colegio de Sinaloa, Antonio Rosales 435 Poniente, Culiacán, Sinaloa, Mexico
| | | | - Federico Páez-Osuna
- Universidad Nacional Autónoma de México, Instituto de Ciencias del Mar y Limnología, Unidad Académica Mazatlán, P.O. Box 811, Mazatlán 82000, Sinaloa, Mexico; Member of El Colegio de Sinaloa, Antonio Rosales 435 Poniente, Culiacán, Sinaloa, Mexico.
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14
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Goren AY, Kobya M. Arsenic removal from groundwater using an aerated electrocoagulation reactor with 3D Al electrodes in the presence of anions. CHEMOSPHERE 2021; 263:128253. [PMID: 33297198 DOI: 10.1016/j.chemosphere.2020.128253] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Revised: 09/01/2020] [Accepted: 09/02/2020] [Indexed: 06/12/2023]
Abstract
Co-occurrence of arsenic and anions in groundwater causes a severe health problems and combine effects of these pollutants significantly affect performance of treatment process. Thus, this study has been conducted to examine the combine effects of anions on arsenic removal using aerated electrocoagulation (EC) reactor with 3D Al electrodes in groundwater. A 3-level, six factors Box-Behnken experimental design (BBD) was applied to investigate the individual and combine effect of anions and operating time: phosphate (x1: 1-10 mg L-1), silica (x2: 20-80 mg L-1), bicarbonate (x3: 130-670 mg L-1), fluoride (x4: 2-10 mg L-1), boron (x5: 5-10 mg L-1), and operating time (x6: 8-22 min) on desired responses. The specified responses were effluent arsenic concentration (Cf,As), removal efficiency of arsenic (Re), consumptions of energy and electrode (ENC and ELC), operational cost (OC), and adsorption capacity (qe). The optimum operating parameters predicted using BBD were found to be x1: 1.0 mg L-1, x2: 26.0 mg L-1, x3: 651.5 mg L-1, x4: 2.0 mg L-1, x5: 9.9 mg L-1, and x6: 10.5 min considering highest removal efficiency of arsenic and lowest operational cost. Under these operating conditions, the experimental values of Cf,As, Re, ENC, ELC, OC, and qe were found to be 2.82 μg L-1, 98.6%, 0.411 kWh m-3, 0.0124 kg m-3, 0.098 $ m-3, and 17.65 μg As (mg Al)-1, respectively. Furthermore, mathematical modelling was conducted using quadratic regression model and response surface analysis was performed to understand the relationship between independent parameters and responses.
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Affiliation(s)
- A Y Goren
- İzmir Institute of Technology, Environmental Science and Engineering, Izmir, Turkey.
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- Gebze Technical University, Department of Environmental Engineering, 41400, Kocaeli, Turkey; Kyrgyz-Turkish Manas University, Department of Environmental Engineering, Bishkek, Kyrgyzstan.
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