1
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Liang Y, Yuan M, Cheng H, Lv H, Zhao L, Tang J, Feng Y, Huang Y, Meng Q. A novel Cu/Fe cathode prepared by a facile redox pathway for phenol degradation electrocatalytically via the electro-fenton assisted electro-chlorination process. WATER RESEARCH 2024; 268:122744. [PMID: 39522480 DOI: 10.1016/j.watres.2024.122744] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2024] [Revised: 11/01/2024] [Accepted: 11/02/2024] [Indexed: 11/16/2024]
Abstract
Electrochemical methods for treating phenolic wastewater have been widely studied, with most research focusing primarily on the anode, while the cathode has generally served as a counter electrode. This study aims to enhance the electrocatalytic process by developing a new Fe/Cu-based cathode using a simple redox method. We created a CuOCu@Fe-Fe2O3-x (0 < x < 1, combining Fe2O3 and FeO) electrode, referred to as CCFFO, to facilitate the electro-Fenton process without requiring additional H2O2 or Fe2+. In our electrolysis system with NaCl as the electrolyte for electro-chlorination process, phenol concentration was reduced from 100 mg/L to below 0.5 mg/L within 10 min. Optimal experimental conditions were determined by evaluating various parameters such as chloride electrolyte concentration, current density, electrode plate spacing, aeration, pH, and cathode types. Additionally, the role of chloride ions in phenol degradation was investigated through free radical quenching experiments. A 500-hour continuous flow experiment demonstrated the durability of the CCFFO cathode. GC/MS analysis identified intermediates formed during phenol degradation and the underlying catalytic mechanism was explored. The results indicate that the electro-chlorination process at the anode is the primary driver of phenol degradation, assisted by the electro-Fenton process on the CCFFO cathode. The CCFFO cathode effectively prevents the production of harmful by-products like perchlorate. The degradation efficiencies of chemical oxygen demand (COD) and total organic carbon (TOC) were 63.5 % and 80.25 %, respectively. Achieving a phenol degradation efficiency of 99.5 % within 10 min, the CCFFO cathode and electrolytic system show significant potential for wastewater treatment applications.
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Affiliation(s)
- YeXin Liang
- Guangzhou Institute of Industrial Intelligence, Guangzhou 511400, PR China
| | - Mingzhe Yuan
- Guangzhou Institute of Industrial Intelligence, Guangzhou 511400, PR China
| | - Haimei Cheng
- Guangzhou Institute of Industrial Intelligence, Guangzhou 511400, PR China
| | - Haiqin Lv
- Guangzhou Institute of Industrial Intelligence, Guangzhou 511400, PR China
| | - Lei Zhao
- Guangzhou Institute of Industrial Intelligence, Guangzhou 511400, PR China
| | - JiaLi Tang
- Guangzhou Institute of Industrial Intelligence, Guangzhou 511400, PR China
| | - Yong Feng
- Guangdong Shengqing Hydrogen Technology Co., LTD, Foshan 528225, PR China
| | - Ying Huang
- Guangzhou Institute of Industrial Intelligence, Guangzhou 511400, PR China; Guangdong Shengqing Hydrogen Technology Co., LTD, Foshan 528225, PR China.
| | - Qingguo Meng
- Guangzhou Institute of Industrial Intelligence, Guangzhou 511400, PR China.
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2
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Atrashkevich A, Garcia-Segura S. Engineering decentralized electrodisinfection to sustain consistent chlorine generation under varying drinking water chloride content. APPLIED CATALYSIS, O, OPEN 2024; 195:None. [PMID: 39415895 PMCID: PMC11482661 DOI: 10.1016/j.apcato.2024.207012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/22/2024] [Revised: 09/04/2024] [Accepted: 09/18/2024] [Indexed: 10/19/2024]
Abstract
In situ electrochlorination can offer an efficient and feasible solution to enable decentralized water disinfection. Unfortunately, there has been only a limited number of studies exploring single-pass flow cell systems with representative flowrates used at household level, particularly under varying chloride concentrations. This work aims to assess anode materials in a single pass and examine the impact of cross velocity, current density, and chloride concentration on various responses such as chlorine production and energy consumption. The primary objective is to determine whether the flow cell can achieve desirable chlorine levels under consistent operation while chloride content of water varies. Chlorine (Cl2/HOCl/OCl-), chlorine dioxide (ClO2) production, and toxic oxyanions (ClO3 -, ClO4 -) were assessed in a single pass setup utilizing different representative anodes including Ti/RuO2, Ti/IrO2, and Boron-doped diamond. Among these materials, the Ti/RuO2 anode emerged as the most suitable for effective chlorine generation while minimizing the formation of ClO3 - and ClO4 -. The performance of in situ electrochlorination using the Ti/RuO2 anode in the flow cell revealed that cross velocity exerted the most significant influence on chlorine generation, while chloride content and current density primarily impacted energy consumption. Optimization of the operating parameters illustrated that stable chlorine concentrations ranging from 2 to 4 mg L-1 could be maintained even with significant fluctuations in chloride concentration from 50 to 250 mg L-1, resulting in a daily energy consumption of less than 0.07 kWh per treated volume of 634 L (i.e., < 0.11 Wh L-1). These experimental findings hold promise for advancing electrodisinfection systems to higher technological readiness level.
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Affiliation(s)
- Aksana Atrashkevich
- Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment, School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ 85287-3005, USA
| | - Sergi Garcia-Segura
- Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment, School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ 85287-3005, USA
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3
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Xue Y, Wang X, Liu Q, Feng M, Ding Z, Chu J, Zhu W, Liu N, Li Z. In situ electro-generated Ni(OH) 2 synergistic with Cu cathode to promote direct ammonia oxidation to nitrogen. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2024; 90:225-237. [PMID: 39007316 DOI: 10.2166/wst.2024.214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2024] [Accepted: 06/07/2024] [Indexed: 07/16/2024]
Abstract
To solve the problem of low removal rate and poor N2 selectivity in direct electrochemical ammonia oxidation (EAO), commercial Ni foam and Cu foam were used as anode and cathode of the EAO system, respectively. The coupling effect between the cathode and anode promoted nitrogen cycling during the reaction process, which improved N2 selectivity of the reaction system and promoted it to achieve a high ammonia removal rate. This study showed that the thin Ni(OH)2 with oxygen vacancy formed on the surface of Ni foam anode played an effective role in the dimerization of intermediate products in ammonia oxidation to form N2. This electrochemical system was used to treat real goose wastewater containing 422.5 mg/L NH4+-N and 94.5 mg/L total organic carbon (TOC). After treatment, this electrochemical system achieved good performance with an ammonia removal rate of 87%, N2 selectivity of 77%, and TOC removal rate of 72%. Therefore, this simple and efficient system with Ni foam anode and Cu foam cathode is a promising method for treating ammonia nitrogen wastewater.
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Affiliation(s)
- Yuzhou Xue
- School of Environment and Surveying Engineering, Suzhou University, Suzhou 234000, China; Research Center of Non-Point Source Pollution Control and Ecological Remediation Technology of Tuohe River Basin, Suzhou University, Suzhou Anhui, 234000, China E-mail:
| | - Xuanxuan Wang
- School of Environment and Surveying Engineering, Suzhou University, Suzhou 234000, China; Research Center of Non-Point Source Pollution Control and Ecological Remediation Technology of Tuohe River Basin, Suzhou University, Suzhou Anhui, 234000, China
| | - Qing Liu
- School of Environment and Surveying Engineering, Suzhou University, Suzhou 234000, China; Research Center of Non-Point Source Pollution Control and Ecological Remediation Technology of Tuohe River Basin, Suzhou University, Suzhou Anhui, 234000, China
| | - Mengru Feng
- School of Environment and Surveying Engineering, Suzhou University, Suzhou 234000, China; Research Center of Non-Point Source Pollution Control and Ecological Remediation Technology of Tuohe River Basin, Suzhou University, Suzhou Anhui, 234000, China
| | - Zimo Ding
- School of Environment and Surveying Engineering, Suzhou University, Suzhou 234000, China; Research Center of Non-Point Source Pollution Control and Ecological Remediation Technology of Tuohe River Basin, Suzhou University, Suzhou Anhui, 234000, China
| | - Jiayue Chu
- School of Environment and Surveying Engineering, Suzhou University, Suzhou 234000, China; Research Center of Non-Point Source Pollution Control and Ecological Remediation Technology of Tuohe River Basin, Suzhou University, Suzhou Anhui, 234000, China
| | - Wenyan Zhu
- School of Environment and Surveying Engineering, Suzhou University, Suzhou 234000, China; Research Center of Non-Point Source Pollution Control and Ecological Remediation Technology of Tuohe River Basin, Suzhou University, Suzhou Anhui, 234000, China
| | - Na Liu
- School of Environment and Surveying Engineering, Suzhou University, Suzhou 234000, China; Research Center of Non-Point Source Pollution Control and Ecological Remediation Technology of Tuohe River Basin, Suzhou University, Suzhou Anhui, 234000, China
| | - Zhichun Li
- School of Environment and Surveying Engineering, Suzhou University, Suzhou 234000, China; Research Center of Non-Point Source Pollution Control and Ecological Remediation Technology of Tuohe River Basin, Suzhou University, Suzhou Anhui, 234000, China
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4
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Herraiz-Carboné M, Santos A, Hayat A, Domínguez CM, Cotillas S. Remediation of groundwater polluted with lindane production wastes by conductive-diamond electrochemical oxidation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 926:171848. [PMID: 38518821 DOI: 10.1016/j.scitotenv.2024.171848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Revised: 03/02/2024] [Accepted: 03/19/2024] [Indexed: 03/24/2024]
Abstract
This work studies the remediation of groundwater saturated with dense non-aqueous phase liquid (DNAPL) from lindane production wastes by electrochemical oxidation. DNAPL-saturated groundwater contains up to 26 chlorinated organic compounds (COCs), including different isomers of hexachlorocyclohexane (HCH). To do this, polluted groundwater was electrolysed using boron-doped diamond (BDD) and stainless steel (SS) as anode and cathode, respectively, and the influence of the current density on COCs removal was evaluated in the range from 5 to 50 mA cm-2. Results show that current densities higher than 25 mA cm-2 lead to the complete removal and mineralisation of all COCs identified in groundwater. The higher the current density, the higher the COCs removal rate. At lower current densities (5 mA cm-2), chlorobenzenes were completely removed, and degradations above 90 % were reached for COCs with more than five chlorine atoms in their molecules. The use of BDD anodes promotes the electrochemical generation of powerful reactive species, such as persulfate, hypochlorite or hydroxyl radicals, that contribute to the degradation and mineralisation of COCs. The applied current density also influences the generation of these species. Finally, no acute toxicity towards Vibrio fischeri was observed for the treated groundwater after the electrochemical oxidation performed at 5 and 10 mA cm-2. These findings demonstrate that electrochemical oxidation with BDD anodes at moderate current densities is a promising alternative for the remediation of actual groundwater contaminated with DNAPLs.
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Affiliation(s)
- Miguel Herraiz-Carboné
- Department of Chemical Engineering and Materials, Faculty of Chemical Sciences, Complutense University of Madrid, Avenida Complutense s/n, 28040 Madrid, Spain
| | - Aurora Santos
- Department of Chemical Engineering and Materials, Faculty of Chemical Sciences, Complutense University of Madrid, Avenida Complutense s/n, 28040 Madrid, Spain
| | - Ana Hayat
- Department of Chemical Engineering and Materials, Faculty of Chemical Sciences, Complutense University of Madrid, Avenida Complutense s/n, 28040 Madrid, Spain
| | - Carmen M Domínguez
- Department of Chemical Engineering and Materials, Faculty of Chemical Sciences, Complutense University of Madrid, Avenida Complutense s/n, 28040 Madrid, Spain
| | - Salvador Cotillas
- Department of Chemical Engineering and Materials, Faculty of Chemical Sciences, Complutense University of Madrid, Avenida Complutense s/n, 28040 Madrid, Spain.
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5
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Randazzo S, Geagea A, Proietto F, Galia A, Scialdone O. Oxidation of organics in water by active chlorine performed in microfluidic electrochemical reactors: a new way to improve the performances of the process. CHEMOSPHERE 2024; 355:141855. [PMID: 38570051 DOI: 10.1016/j.chemosphere.2024.141855] [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: 11/20/2023] [Revised: 03/19/2024] [Accepted: 03/28/2024] [Indexed: 04/05/2024]
Abstract
Wastewater polluted by organics can be treated by using electro-generated active chlorine, even if this promising route presents some important drawbacks such as the production of chlorinated by-products. Here, for the first time, this process was studied in a microfluidic electrochemical reactor with a very small inter-electrode distance (145 μm) using a water solution of NaCl and phenol and a BDD anode. The potential production of chloroacetic acids, chlorophenols, carboxylic acids, chlorate and perchlorate was carefully evaluated. It was shown, for the first time, up to our knowledge, that the use of the microfluidic device allows to perform the treatment under a continuous mode and to achieve higher current efficiencies and a lower generation of some important by-products such as chlorate and perchlorate. As an example, the use of the microfluidic apparatus equipped with an Ag cathode allowed to achieve a high removal of total organic carbon (about 76%) coupled with a current efficiency of 17% and the production of a small amount of chlorate (about 30 ppm) and no perchlorate. The effect of many parameters (namely, flow rate, current density and nature of cathode) was also investigated.
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Affiliation(s)
- Serena Randazzo
- Università Degli Studi di Palermo, Dipartimento di Ingegneria, Viale Delle Scienze, Palermo, Italy
| | - Ange Geagea
- Università Degli Studi di Palermo, Dipartimento di Ingegneria, Viale Delle Scienze, Palermo, Italy
| | - Federica Proietto
- Università Degli Studi di Palermo, Dipartimento di Ingegneria, Viale Delle Scienze, Palermo, Italy
| | - Alessandro Galia
- Università Degli Studi di Palermo, Dipartimento di Ingegneria, Viale Delle Scienze, Palermo, Italy
| | - Onofrio Scialdone
- Università Degli Studi di Palermo, Dipartimento di Ingegneria, Viale Delle Scienze, Palermo, Italy.
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6
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Atrashkevich A, Alum A, Stirling R, Abbaszadegan M, Garcia-Segura S. Approaching easy water disinfection for all: Can in situ electrochlorination outperform conventional chlorination under realistic conditions? WATER RESEARCH 2024; 250:121014. [PMID: 38128307 DOI: 10.1016/j.watres.2023.121014] [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: 09/19/2023] [Revised: 11/29/2023] [Accepted: 12/11/2023] [Indexed: 12/23/2023]
Abstract
Electrochlorination has gained research interest for its potential application as decentralized water treatment. A number of studies have displayed promising efficiency for water disinfection. However, a comprehensive comparison of in situ electrodisinfection to existing disinfection techniques, particularly under realistic water composition and flow rates, still needs additional research efforts. The aim of this study is to evaluate in situ electrochlorination while comparing the treatment with conventional chemical chlorination for point-of-entry decentralized disinfection at the household level. An electrochemical flow cell reactor was operated in a single pass mode considering water flow and water consumption for a household of four family members. Disinfection efficiency assessment of both electrochemical and chemical chlorination was conducted using bacterial and viral surrogates, E. coli and MS2 bacteriophage. Furthermore, a techno-economic analysis was conducted, using the levelized cost of water, to compare two electrochemical chlorination scenarios (i.e., electrical grid energy use, and solar panel powered system) and benchmarked against the baseline treatment of chemical chlorination. The findings revealed increased inactivation efficiency of in situ electrochlorination over conventional chlorination (p-value < 0.05). The synergetic impact of radicals and chlorine, and/or contribution of high chlorine concentration at acidic pH near anode surface were identified as key factors that could enhance disinfection performance of in situ electrochlorination. The techno-economic analysis demonstrated that electrochemical treatment, when operated using renewable energy sources, is not only a more environmentally sustainable approach, but also emerges as a more economically feasible solution for decentralized water treatment application. The results highlight that in situ electrochlorination is a more advanced alternative to decentralized water chlorination. However, further fundamental research on products and by-products formation under various water matrices is required.
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Affiliation(s)
- Aksana Atrashkevich
- School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ 85287-3005, USA; Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment, Tempe, AZ 85287-3005, USA
| | - Absar Alum
- School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ 85287-3005, USA; Water and Environmental Technology Center, Arizona State University, Tempe, AZ 85281, USA
| | - Robert Stirling
- School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ 85287-3005, USA; Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment, Tempe, AZ 85287-3005, USA
| | - Morteza Abbaszadegan
- School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ 85287-3005, USA; Water and Environmental Technology Center, Arizona State University, Tempe, AZ 85281, USA
| | - Sergi Garcia-Segura
- School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ 85287-3005, USA; Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment, Tempe, AZ 85287-3005, USA.
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7
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Kumari B, Chauhan GS, Ranote S, Jamwal P, Kumar R, Kumar K, Chauhan S. KMnO 4-oxidized whole pine needle based adsorbent for selective and efficient removal of cationic dyes. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2023; 26:178-192. [PMID: 37409646 DOI: 10.1080/15226514.2023.2231555] [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] [Indexed: 07/07/2023]
Abstract
In the present study, we report the chemical modification of the dried and fallen pine needles (PNs) via a simple protocol using KMnO4 oxidation. The oxidized PNs (OPNs) were evaluated as adsorbents using some cationic and anionic dyes. The successful synthesis of OPNs adsorbent was characterized by various techniques to ascertain its structural attributes. The adsorbent showed selectivity for the cationic dyes with 96.11% removal (Pr) for malachite green (MG) and 89.68% Pr for methylene blue (MB) in 120 min. Kinetic models namely, pseudo-first order, pseudo-second order, and Elovich were applied to have insight into adsorption. Additionally, three adsorption isotherms, i.e., Langmuir, Freundlich, and Temkin were also applied. The dye adsorption followed a pseudo-second-order kinetic model with R2 > 0.99912 for MG and R2 > 0.9998 for MB. The adsorbent followed the Langmuir model with a maximum adsorption capacity (qm) of 223.2 mg/g and 156.9 mg/g for MG and MB, respectively. Furthermore, the OPNs showed remarkable regeneration and recyclability up to nine adsorption-desorption cycles with appreciable adsorption for both the dyes. The use of OPNs as an adsorbent for the removal of dyes from wastewater, therefore, provides an ecologically benign, low-cost, and sustainable solution.
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Affiliation(s)
- Babita Kumari
- Department of Chemistry, Himachal Pradesh University, Shimla, India
| | | | - Sunita Ranote
- Department of Chemistry, Himachal Pradesh University, Shimla, India
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences, Zabrze, Poland
| | - Pooja Jamwal
- Department of Chemistry, Himachal Pradesh University, Shimla, India
| | - Rajesh Kumar
- Department of Chemistry, Jagdish Chandra DAV College, Dasuya, India
| | - Kiran Kumar
- Department of Chemistry, Himachal Pradesh University, Shimla, India
| | - Sandeep Chauhan
- Department of Chemistry, Himachal Pradesh University, Shimla, India
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8
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Najafinejad MS, Chianese S, Fenti A, Iovino P, Musmarra D. Application of Electrochemical Oxidation for Water and Wastewater Treatment: An Overview. Molecules 2023; 28:molecules28104208. [PMID: 37241948 DOI: 10.3390/molecules28104208] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 05/15/2023] [Accepted: 05/18/2023] [Indexed: 05/28/2023] Open
Abstract
In recent years, the discharge of various emerging pollutants, chemicals, and dyes in water and wastewater has represented one of the prominent human problems. Since water pollution is directly related to human health, highly resistant and emerging compounds in aquatic environments will pose many potential risks to the health of all living beings. Therefore, water pollution is a very acute problem that has constantly increased in recent years with the expansion of various industries. Consequently, choosing efficient and innovative wastewater treatment methods to remove contaminants is crucial. Among advanced oxidation processes, electrochemical oxidation (EO) is the most common and effective method for removing persistent pollutants from municipal and industrial wastewater. However, despite the great progress in using EO to treat real wastewater, there are still many gaps. This is due to the lack of comprehensive information on the operating parameters which affect the process and its operating costs. In this paper, among various scientific articles, the impact of operational parameters on the EO performances, a comparison between different electrochemical reactor configurations, and a report on general mechanisms of electrochemical oxidation of organic pollutants have been reported. Moreover, an evaluation of cost analysis and energy consumption requirements have also been discussed. Finally, the combination process between EO and photocatalysis (PC), called photoelectrocatalysis (PEC), has been discussed and reviewed briefly. This article shows that there is a direct relationship between important operating parameters with the amount of costs and the final removal efficiency of emerging pollutants. Optimal operating conditions can be achieved by paying special attention to reactor design, which can lead to higher efficiency and more efficient treatment. The rapid development of EO for removing emerging pollutants from impacted water and its combination with other green methods can result in more efficient approaches to face the pressing water pollution challenge. PEC proved to be a promising pollutants degradation technology, in which renewable energy sources can be adopted as a primer to perform an environmentally friendly water treatment.
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Affiliation(s)
| | - Simeone Chianese
- Department of Engineering, University of Campania "Luigi Vanvitelli", Via Roma 29, 81031 Aversa, Italy
| | - Angelo Fenti
- Department of Engineering, University of Campania "Luigi Vanvitelli", Via Roma 29, 81031 Aversa, Italy
| | - Pasquale Iovino
- Department of Environmental, Biological and Pharmaceutical Sciences and Technologies, University of Campania "Luigi Vanvitelli", Via Vivaldi 43, 81100 Caserta, Italy
| | - Dino Musmarra
- Department of Engineering, University of Campania "Luigi Vanvitelli", Via Roma 29, 81031 Aversa, Italy
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9
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Li H, Dechesne A, He Z, Jensen MM, Song HL, Smets BF. Electrochemical disinfection may increase the spread of antibiotic resistance genes by promoting conjugal plasmid transfer. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 858:159846. [PMID: 36328265 DOI: 10.1016/j.scitotenv.2022.159846] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 10/25/2022] [Accepted: 10/27/2022] [Indexed: 06/16/2023]
Abstract
Current in the milliampere range can be used for electrochemical inactivation of bacteria. Yet, bacteria-including antibiotic resistant bacteria (ARB) may be subjected to sublethal conditions due to imperfect mixing or energy savings measures during electrochemical disinfection. It is not known whether such sublethal current intensities have the potential to stimulate plasmid transfer from ARB. In this study, conjugal transfer of plasmid pKJK5 was investigated between Pseudomonas putida strains under conditions reflecting electrochemical disinfection. Although the abundance of culturable and membrane-intact donor and recipient cells decreased with applied current (0-60 mA), both transconjugant density and transconjugant frequency increased. Both active chlorine and superoxide radicals were generated electrolytically, and ROS generation was induced. In addition, we detected significant over expression of a core oxidative stress defense gene (ahpCF) with current. Expression of selected conjugation related genes (traE, traI, trbJ, and trbL) also significantly correlated with current intensity. ROS accumulation, SOS response and subsequent derepression of conjugation are therefore the plausible consequence of sublethal current exposure. These findings suggest that sublethal intensities of current can enhance conjugal plasmid transfer, and that it is essential that conditions of electrochemical disinfection (applied voltage, current density, time and mixing) are carefully controlled to avoid conjugal ARG transmission.
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Affiliation(s)
- Hua Li
- College of Urban Construction, Nanjing Tech University, Nanjing 211816, China; Department of Environmental and Resource Engineering, Technical University of Denmark, Kgs Lyngby 2800, Denmark
| | - Arnaud Dechesne
- Department of Environmental and Resource Engineering, Technical University of Denmark, Kgs Lyngby 2800, Denmark.
| | - Zhiming He
- Department of Environmental and Resource Engineering, Technical University of Denmark, Kgs Lyngby 2800, Denmark.
| | - Marlene Mark Jensen
- Department of Environmental and Resource Engineering, Technical University of Denmark, Kgs Lyngby 2800, Denmark.
| | - Hai Liang Song
- School of Environment, Jiangsu Engineering Lab of Water and Soil Eco-remediation, Jiangsu Province Engineering Research Center of Environmental Risk Prevention and Emergency Response Technology, Nanjing Normal University, Wenyuan Road 1, Nanjing 210023, China.
| | - Barth F Smets
- Department of Environmental and Resource Engineering, Technical University of Denmark, Kgs Lyngby 2800, Denmark.
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10
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Yan W, Chen J, Wu J, Li Y, Liu Y, Yang Q, Tang Y, Jiang B. Investigation on the adverse impacts of electrochemically produced ClO x- on assessing the treatment performance of dimensionally stable anode (DSA) for Cl --containing wastewater. CHEMOSPHERE 2023; 310:136848. [PMID: 36243090 DOI: 10.1016/j.chemosphere.2022.136848] [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: 09/08/2022] [Revised: 10/07/2022] [Accepted: 10/08/2022] [Indexed: 06/16/2023]
Abstract
The presence of chloride ions can facilitate the COD removal efficiency due to the involvement of active chlorine species in the electro-oxidation process, but few attentions have been paid to the negative effect of the electro-generated oxychlorides on electro-oxidation performance. In this study, the effects of oxychlorides were investigated as functions of current density and phenol concentration using DSA anodes in terms of the evaluation of the COD removal performance and the biological toxicity. The results show that oxychlorides formed in the electro-oxidation system could result in the over-evaluation of the COD removal performance. Increasing current density (15-50 mA cm-2) aggravated the over-evaluation of COD removal (4%-18%), owing to the enhancement in the electrochemical generation of oxychlorides. The increase of phenol concentration inhibited the production of oxychlorides, but the effect of oxychlorides on COD values at phenol concentration of 200 mg L-1 (82 mg L-1) was higher than that at 100 mg L-1 (51 mg L-1). The ClO3- was predominantly responsible for over-evaluation of the COD removal. In addition, bioassays with chlorella indicated that the electro-generated oxychlorides significantly increased the biological toxicity of the treated Cl--containing wastewater. This work provides new guidance for the correct evaluation of COD treatment performance and highlight the importance of minimizing toxic inorganic chlorinated byproducts during electro-oxidation of Cl--containing wastewater.
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Affiliation(s)
- Wei Yan
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, PR China
| | - Jinghua Chen
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, PR China
| | - Jingli Wu
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, PR China
| | - Yifan Li
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, PR China
| | - Yijie Liu
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, PR China
| | - Qipeng Yang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, PR China
| | - Yizhen Tang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, PR China
| | - Bo Jiang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, PR China.
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11
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Kamran U, Rhee KY, Lee SY, Park SJ. Innovative progress in graphene derivative-based composite hybrid membranes for the removal of contaminants in wastewater: A review. CHEMOSPHERE 2022; 306:135590. [PMID: 35803370 DOI: 10.1016/j.chemosphere.2022.135590] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 06/04/2022] [Accepted: 06/30/2022] [Indexed: 06/15/2023]
Abstract
Graphene derivatives (graphene oxide) are proved as an innovative carbon materials that are getting more attraction in membrane separation technology because of its unique properties and capability to attain layer-to-layer stacking, existence of high oxygen-based functional groups, and generation of nanochannels that successively enhance the selective pollutants removal performance. The review focused on the recent innovations in the development of graphene derivative-based composite hybrid membranes (GDHMs) for the removal of multiple contaminants from wastewater treatment. To design GDHMs, it was observed that at first GO layers undergo chemical treatments with either different polymers, plasma, or sulfonyl. After that, the chemically treated GO layers were decorated with various active functional materials (either with nanoparticles, magnetite, or nanorods, etc.). By preparing GDHMs, properties such as permeability, porosity, hydrophilicity, water flux, stability, feasibility, mechanical strength, regeneration ability, and antifouling tendency were excessively improved as compared to pristine GO membranes. Different types of novel GDHMs were able to remove toxic dyes (77-100%), heavy metals/ions (66-100%), phenols (40-100%), and pharmaceuticals (74-100%) from wastewater with high efficiency. Some of GDHMs were capable to show dual contaminant removal efficacy and antibacterial activity. In this study, it was observed that the most involved mechanisms for pollutants removal are size exclusion, transport, electrostatic interactions, adsorption, and donnan exclusion. In addition to this, interaction mechanism during membrane separation technology has also been elaborated by density functional theory. At last, in this review the discussion related to challenges, limitations, and future outlook for the applications of GDHMs has also been provided.
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Affiliation(s)
- Urooj Kamran
- Department of Chemistry, Inha University, 100 Inharo, Incheon, 22212, South Korea; Department of Mechanical Engineering, College of Engineering, Kyung Hee University, Yongin, 445-701, South Korea
| | - Kyong Yop Rhee
- Department of Mechanical Engineering, College of Engineering, Kyung Hee University, Yongin, 445-701, South Korea.
| | - Seul-Yi Lee
- Department of Chemistry, Inha University, 100 Inharo, Incheon, 22212, South Korea.
| | - Soo-Jin Park
- Department of Chemistry, Inha University, 100 Inharo, Incheon, 22212, South Korea.
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12
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Zhang C, Yu Z, Wang X. A review of electrochemical oxidation technology for advanced treatment of medical wastewater. Front Chem 2022; 10:1002038. [PMID: 36186585 PMCID: PMC9520591 DOI: 10.3389/fchem.2022.1002038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Accepted: 08/23/2022] [Indexed: 12/05/2022] Open
Abstract
Antibiotics widely exist in medical wastewater, which seriously endanger human health. With the spread of the COVID-19 and monkeypox around the world, a large number of antibiotics have been abused and discharged. How to realize the green and efficient treatment of medical wastewater has become a hot research topic. As a common electrochemical water treatment technology, electrochemical oxidation technology (EOT) could effectively achieve advanced treatment of medical wastewater. Since entering the 21st century, electrochemical oxidation water treatment technology has received more and more attention due to its green, efficient, and easy-to-operate advantages. In this study, the research progress of EOT for the treatment of medical wastewater was reviewed, including the exploration of reaction mechanism, the preparation of functional electrode materials, combining multiple technologies, and the design of high-efficiency reactors. The conclusion and outlook of EOT for medical wastewater treatment were proposed. It is expected that the review could provide prospects and guidance for EOT to treat medical wastewater.
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Affiliation(s)
- Chengyu Zhang
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, China
- Binzhou Institute of Technology, Weiqiao-UCAS Science and Technology Park, Binzhou, Shandong Province, China
- RCEES-IMCAS-UCAS Joint-Lab of Microbial Technology for Environmental Science, Beijing, China
| | - Zhisheng Yu
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, China
- Binzhou Institute of Technology, Weiqiao-UCAS Science and Technology Park, Binzhou, Shandong Province, China
- RCEES-IMCAS-UCAS Joint-Lab of Microbial Technology for Environmental Science, Beijing, China
- *Correspondence: Zhisheng Yu,
| | - Xiangyang Wang
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, China
- Binzhou Institute of Technology, Weiqiao-UCAS Science and Technology Park, Binzhou, Shandong Province, China
- RCEES-IMCAS-UCAS Joint-Lab of Microbial Technology for Environmental Science, Beijing, China
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13
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Xu H, Chen R, Liang S, Lei Z, Zheng W, Yan Z, Cao J, Wei C, Feng C. Minimizing toxic chlorinated byproducts during electrochemical oxidation of Ni-EDTA: Importance of active chlorine-triggered Fe(II) transition to Fe(IV). WATER RESEARCH 2022; 219:118548. [PMID: 35561618 DOI: 10.1016/j.watres.2022.118548] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 04/14/2022] [Accepted: 05/02/2022] [Indexed: 06/15/2023]
Abstract
The formation of chlorinated byproducts represents a significant threat to the quality of the effluent treated using electrochemical advanced oxidation processes (EAOPs), thus spurring investigation into alleviating their production. This study presents a new strategy to minimize the release of chlorinated intermediates during the electrochemical oxidation of Ni-EDTA by establishing a dual mixed metal oxide (MMO)/Fe anode system. The results indicate that the dual-anode system achieved a substantially higher rate (0.141 min-1) of Ni-EDTA destruction and accordingly allowed a more pronounced removal of aqueous Ni (from 39.85 to 0.63 mg L-1) after alkaline precipitation, compared with its single MMO anode (0.017 min-1 of Ni-EDTA removal, with 14.38 mg L-1 Ni remaining) and single Fe anode (insignificant Ni-EDTA removal, with 38.37 mg L-1 Ni remaining) counterparts. Compared to reactive chlorine species (RCS) produced from the single MMO anode system, Fe(IV) was in situ generated from the dual-anode system and was predominantly responsible for the attenuation of chlorinated byproducts and thus the decrease in the acute toxicity of the treated solution (evaluated using luminescent bacteria). The Fe(IV)-dominated dual-anode system also exhibited superior performance in removing multiple pollutants (including organic ligands, Ni, and phosphite) in the real electroless plating effluent. The findings suggest that the strategy for Fe(II) transition to Fe(IV) by active chlorine paves a new avenue for yielding less chlorinated products with lower toxicity when EAOPs are used to treat chloride-containing organic wastewater.
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Affiliation(s)
- Haolin Xu
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China
| | - Rundong Chen
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China
| | - Sheng Liang
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China
| | - Zhenchao Lei
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China
| | - Wenxiao Zheng
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China
| | - Zhang Yan
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China
| | - Jianxin Cao
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China
| | - Chaohai Wei
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China
| | - Chunhua Feng
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China.
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Abidi J, Clematis D, Samet Y, Delucchi M, Cademartori D, Panizza M. Influence of anode material and chlorides in the new-gen solid polymer electrolyte cell for electrochemical oxidation – Optimization of Chloroxylenol degradation with response surface methodology. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116584] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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15
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Hao Y, Ma H, Proietto F, Prestigiacomo C, Peng Fei M, Galia A, Scialdone O. Removal of phenol in water in the presence of NaCl in undivided cells equipped with carbon felt or Ni cathodes: Effect of air pressure. ChemElectroChem 2022. [DOI: 10.1002/celc.202200091] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yongyong Hao
- University of Palermo: Universita degli Studi di Palermo Dipartimento di Ingegneria CHINA
| | - Hongrui Ma
- Shaanxi University of Science and Technology Xi\'an Campus: Shaanxi University of Science and Technology School of Environmental Science and Engineering CHINA
| | - Federica Proietto
- University of Palermo: Universita degli Studi di Palermo Dipartimento di Ingegneria ITALY
| | - Claudia Prestigiacomo
- University of Palermo: Universita degli Studi di Palermo Dipartimento di Ingegneria ITALY
| | - Ma Peng Fei
- Università degli Studi di Palermo: Universita degli Studi di Palermo Dipartimento di Ingegneria CHINA
| | - Alessandro Galia
- University of Palermo: Universita degli Studi di Palermo Dipartimento di Ingegneria ITALY
| | - Onofrio Scialdone
- Università Ingegneria Chimica Gestionale Informatica Meccanica viale delle Scienze 90128 Palermo ITALY
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16
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Hao Y, Ma P, Ma H, Proietto F, Prestigiacomo C, Galia A, Scialdone O. Electrochemical treatment of synthetic wastewaters contaminated by organic pollutants at Ti4O7 anode: experimental results and theoretical modelling. ChemElectroChem 2022. [DOI: 10.1002/celc.202101720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Yongyong Hao
- University of Palermo: Universita degli Studi di Palermo Ingegneria CHINA
| | - Pengfei Ma
- University of Palermo: Universita degli Studi di Palermo Ingegneria CHINA
| | - Hongrui Ma
- Shaanxi University of Science and Technology Xi\'an Campus: Shaanxi University of Science and Technology School of environmental science and technology CHINA
| | - Federica Proietto
- University of Palermo: Universita degli Studi di Palermo Ingegneria ITALY
| | | | - Alessandro Galia
- University of Palermo: Universita degli Studi di Palermo Ingegneria ITALY
| | - Onofrio Scialdone
- Università Ingegneria Chimica Gestionale Informatica Meccanica viale delle Scienze 90128 Palermo ITALY
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