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Zhou Y, Qiu J, Hu S, Liu K, Peng Q, Yi S, Cai Q, Lei X. Study on the efficacy and mechanism of treatment of manganese-containing wastewater by pulse-alternating current coagulation. ENVIRONMENTAL TECHNOLOGY 2024:1-11. [PMID: 38780508 DOI: 10.1080/09593330.2024.2354517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2024] [Accepted: 05/02/2024] [Indexed: 05/25/2024]
Abstract
To assess the effectiveness and underlying mechanism of pulse-alternating current coagulation (PACC) for treating manganese-laden wastewater, we examined the influence of various parameters. Specifically, we investigated the impact of current density, initial pH, initial Mn2+ concentration, electrolyte concentration, and alternating current frequency on the removal efficacy. The removal mechanism was meticulously examined using an adsorption kinetics analysis, Scanning Electron Microscope (SEM), Energy Dispersive Spectroscopy (EDS), Fourier Transform Infrared Spectrum (FTIR), and X-ray Photoelectron Spectroscopy (XPS). The findings indicated that the concentration of Re(Mn2+) was 99.09% under the specified conditions: j = 2.5 A·m-2, pH0 = 7, c0(Mn2+) = 50 mg·dm-3, f = 500 Hz, c0(NaCl) = 500 mg·dm-3 and t = 40 min. When Re(Mn2+) = 98%, the energy consumption (EEC) was significantly lower for PACC at 1.23 kWh·m-3, compared to 1.52 kWh·m-3 for direct current condensation (DCC). This indicated a reduction in EEC by 19.1% when using PACC over DCC. The adsorption process of Mn2+ by the iron sol adheres to the principles of pseudo-second order kinetics. The primary component of flocs generated in the PACC process is α-FeOOH. The mechanism of Mn2+ removal in the PACC process involved the synthesis of Mn oxides, the formation of metal hydroxide precipitates and adsorption by nano-iron sol. This study provides a theoretical basis and technical support for the application of PACC technology in the field of manganese-containing wastewater treatment.
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Affiliation(s)
- Yihui Zhou
- Hunan Automotive Engineering Vocational College, Zhuzhou, People's Republic of China
- Aerospace Kaitian Environmental Technology Co., Ltd., Changsha, People's Republic of China
| | - Jingxian Qiu
- Aerospace Kaitian Environmental Technology Co., Ltd., Changsha, People's Republic of China
| | - Simeng Hu
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, People's Republic of China
| | - Kang Liu
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, People's Republic of China
| | - Qingjuan Peng
- College of Chemistry and Chemical Engineering, Hunan University, Changsha, People's Republic of China
| | - Shi Yi
- Hunan Automotive Engineering Vocational College, Zhuzhou, People's Republic of China
| | - Qunhuan Cai
- Hu-nan New Frontier Sci & Tech Co, Ltd., Changsha, People's Republic of China
| | - Xiping Lei
- Hunan Automotive Engineering Vocational College, Zhuzhou, People's Republic of China
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Hu Q, He L, Lan R, Feng C, Pei X. Recent advances in phosphate removal from municipal wastewater by electrocoagulation process: A review. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2022.122944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Chu T, Cheng M, Hou S, Yang Y. Modified graphite paper treated by anionic intercalation for manganese removal via electrochemical deposition in water treatment. J IND ENG CHEM 2023. [DOI: 10.1016/j.jiec.2023.01.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Abbas SH, Younis YM, Rashid KH, Khadom AA. Removal of methyl orange dye from simulated wastewater by electrocoagulation technique using Taguchi method: kinetics and optimization approaches. REACTION KINETICS MECHANISMS AND CATALYSIS 2022. [DOI: 10.1007/s11144-022-02269-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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Bajpai M, Katoch SS, Kadier A, Singh A. A review on electrocoagulation process for the removal of emerging contaminants: theory, fundamentals, and applications. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:15252-15281. [PMID: 34978675 DOI: 10.1007/s11356-021-18348-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Accepted: 12/22/2021] [Indexed: 06/14/2023]
Abstract
Electrocoagulation (EC) is an excellent and promising technology in wastewater treatment, as it combines the benefits of coagulation, flotation, and electrochemistry. During the last decade, extensive researches have focused on removal of emerging contaminants by using electrocoagualtion, due to its several advantages like compactness, cost-effectiveness, efficiency, low sludge production, and eco-friendness. Emerging contaminants (ECs) are micropollutants found in trace amounts that discharging into conventional wastewater treatment (WWT) plants entering surface waters and imposing a high threat to human and aquatic life. Various studies reveal that about 90% of emerging contaminants are disposed unscientifically into water bodies, creating problems to public health and environment. The studies on removal of emerging contaminants from wastewater are by global researchers are critically reviewed. The core findings proved that still more research required into optimization of parameters, system design, and economic feasibility to explore the potential of EC combined systems. This review has introduced an innovative collection of current knowledge on electro-coagulation for the removal of emerging contaminants.
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Affiliation(s)
- Mukul Bajpai
- Environmental Engineering Laboratory, Civil Engineering Department, National Institute of Technology Hamirpur, Hamirpur, Himachal Pradesh, 177005, India.
| | - Surjit Singh Katoch
- Environmental Engineering Laboratory, Civil Engineering Department, National Institute of Technology Hamirpur, Hamirpur, Himachal Pradesh, 177005, India
| | - Abudukeremu Kadier
- Laboratory of Environmental Science and Technology, The Xinjiang Technical Institute of Physics and Chemistry, Key Laboratory of Functional Materials and Devices for Special Environments, Chinese Academy of Sciences, Urumqi, 830011, China
| | - Adarsh Singh
- Civil Engineering Department, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal, 721302, India
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Bajpai M, Katoch SS, Kadier A, Ma PC. Treatment of pharmaceutical wastewater containing cefazolin by electrocoagulation (EC): Optimization of various parameters using response surface methodology (RSM), kinetics and isotherms study. Chem Eng Res Des 2021. [DOI: 10.1016/j.cherd.2021.10.012] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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Abou-Elela SI, Fawzy ME, El-Shafai SA. Treatment of hazardous wastewater generated from metal finishing and electro-coating industry via self-coagulation: Case study. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2021; 93:1476-1486. [PMID: 33704854 DOI: 10.1002/wer.1552] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2020] [Revised: 02/16/2021] [Accepted: 03/01/2021] [Indexed: 06/12/2023]
Abstract
The aim of this study is to find out a sustainable and cost-effective solution to manage hazardous shock loads from metal finishing and electro-coating industry. Results indicated that the main sources of hazardous wastewater are coming from batch chemical cleaning of degreasing basin (CCDB) (pH 13) and contains very hazardous chemicals, batch chemical cleaning of phosphating basin (CCPB) (pH 1.03) and contains high concentrations of iron (2300 mg/L) and zinc (2400 mg/L) and degreasing basin contents (DBC). Different treatment approaches were investigated. Results indicated that mixing CCDB with CCPB at their actual discharge allowed to form a self-coagulant of metal hydroxide which was utilized to treat the (DBC) followed by sedimentation. Removal efficiency of COD (87%), TSS (94%), and oil and grease (92%) were achieved. To compare the efficiency of this treatment approach, conventional chemical coagulation of DBC was carried out using FeCl3 but the amount was very high. In conclusion, results proved the advantage of using self-coagulation to treat DBC since it eliminates the use of external chemicals and provides an integrated solution for the three main sources of hazardous pollutants. PRACTITIONER POINTS: The manuscript provide an innovative and sustainable solution to the shock loads of hazardous wastewater generated from metal finishing and E-coating industry by utilizing iron-rich wastewater from chemical cleaning of phosphating basin and alkaline wastewater from chemical cleaning of degreasing basin to produce metal hydroxide. The metal hydroxide was cost-effective and technically effectively than external coagulant in treating highly polluted degreasing basin content at due discharge time. Iron-rich wastewater could be used to produce self-coagulant of iron hydroxide. Mixing iron rich wastewater and alkaline wastewater produce iron hydroxide. Iron hydroxide is cost-effective in treating hazardous wastewater of degreasing basin.
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Affiliation(s)
- Sohair I Abou-Elela
- Water Pollution Research Department, National Research Centre, Dokki, Giza, 12622, Egypt
| | - Mariam E Fawzy
- Water Pollution Research Department, National Research Centre, Dokki, Giza, 12622, Egypt
| | - Saber A El-Shafai
- Water Pollution Research Department, National Research Centre, Dokki, Giza, 12622, Egypt
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Phalakornkule C, Suandokmai T, Petchakan S. A solar powered direct current electrocoagulation system with hydrogen recovery for wastewater treatment. SEP SCI TECHNOL 2019. [DOI: 10.1080/01496395.2019.1627371] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Chantaraporn Phalakornkule
- Department of Chemical Engineering, Faculty of Engineering, King Mongkut’s University of Technology North Bangkok, Bangkok, Thailand
- The Research Center for Renewable Energy and Product, Science and Technology Research Institute, King Mongkut’s University of Technology North Bangkok, Bangkok, Thailand
| | - Thanakamol Suandokmai
- Department of Chemical Engineering, Faculty of Engineering, King Mongkut’s University of Technology North Bangkok, Bangkok, Thailand
| | - Sivinee Petchakan
- Department of Chemical Engineering, Faculty of Engineering, King Mongkut’s University of Technology North Bangkok, Bangkok, Thailand
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