1
|
Deng B, Ren Z, Li Q, Zhang Z, Xu C, Wang P, Zhao H, Yuan Q. Black soldier fly larvae mediate Zinc and Chromium transformation through the ZnuCBA and citric acid cycle system. WATER RESEARCH 2025; 280:123483. [PMID: 40090144 DOI: 10.1016/j.watres.2025.123483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2024] [Revised: 03/09/2025] [Accepted: 03/11/2025] [Indexed: 03/18/2025]
Abstract
Intestinal microbiota and metal regulatory proteins (MRPs) underlie the transformation of heavy metals (HMs) by the black soldier fly larvae (BSFL), but the mechanisms involved are still not fully defined. Here, using 16S rRNA and metagenomics-assisted tracing, we found that zinc (Zn) and chromium (Cr) stress led to enrichment of Proteobacteria in the BSFL intestine. Support of Proteobacteria also led to increased levels of the Zn transporter proteins ZnuC/B/A and the Zn efflux proteins zntR/A. Meanwhile, the genes MltE, CitT, and SLT, which mediate the citric acid cycle, were also significantly up-regulated and involved in the cellular uptake of Cr. Although Zn and Cr stress affected the expression of antibiotic resistance genes and pathogenic genes, the BSFL intestine tended to form stable microbial communities (MCs) to transform HMs through a mechanism driven by ZupT and chrA. In addition, the expression of SCARB1 and LdcA was significantly down-regulated by acute HMs stimulation, but BSFL were still able to complete the life cycle. Therefore, we determined the protective role of MCs and MRPs on BSFL during the transformation of HMs.
Collapse
Affiliation(s)
- Bo Deng
- Key Laboratory of Smart Farming for Agricultural Animals, College of Engineering, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Zihe Ren
- MOE Key Lab of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Science, Zhejiang University, Hangzhou 310058, PR China
| | - Qiang Li
- Key Laboratory of Smart Farming for Agricultural Animals, College of Engineering, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Zhijian Zhang
- MOE Key Lab of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Science, Zhejiang University, Hangzhou 310058, PR China
| | - Chao Xu
- Hubei Biomass-Resource Chemistry and Environmental Biotechnology Key Laboratory, School of Resource and Environmental Sciences, Wuhan University, Wuhan 430079, PR China
| | - Panpan Wang
- Key Laboratory of Recycling and Eco-Treatment of Waste Biomass of Zhejiang Province, College of Environment and Natural Resources, Zhejiang University of Science and Technology, Hangzhou 310023, PR China
| | - Heping Zhao
- MOE Key Lab of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Science, Zhejiang University, Hangzhou 310058, PR China.
| | - Qiaoxia Yuan
- Key Laboratory of Smart Farming for Agricultural Animals, College of Engineering, Huazhong Agricultural University, Wuhan 430070, PR China.
| |
Collapse
|
2
|
Yu P, Shao H, Feng Y, Liu Y, Fan P, Qin H, Guan X. One-step rapid and complete removal of Ni(II)-EDTA by O 3/H 2O 2/Fe 0 process: The role of high-valent Ni species. WATER RESEARCH 2025; 279:123459. [PMID: 40120191 DOI: 10.1016/j.watres.2025.123459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2024] [Revised: 02/19/2025] [Accepted: 03/07/2025] [Indexed: 03/25/2025]
Abstract
The removal of complexed Ni from wastewater typically requires advanced oxidation processes for decomplexation, followed by chemical precipitation or adsorption steps. Simplifying this process while meeting stringent discharge standards remains challenging. Here, we developed a one-step O3/H2O2/Fe0 system for the rapid and complete removal of Ni(II)-EDTA. In this system, Ni(II)-EDTA undergoes decomplexation and the resulting Ni2+ can be subsequently removed. Through this two-stage process, the concentration of total Ni can be decreased to below 0.1 mg/L at pH0 4.0-8.0. The O3/H2O2/Fe0 system generated multiple reactive oxidizing species, i.e., HO·, O2·-, 1O2, and Fe(IV). The probe method suggested Fe0 enhanced the production of 1O2 and Fe(IV), indicating their significant roles in this system. In the decomplexation stage, combined experimental evidence, including chemiluminescence, revealed the formation of Ni(IV) species. It progressively degraded into smaller chelated Ni(IV) intermediates and ultimately converted to Ni2+ and Ni(II/III) hydroxides. In the second stage, the Ni(II/III) hydroxides formed in the first stage catalyzed the oxidative removal of the Ni2+, resulting in final products composed of Ni(II/III) hydroxides. The H2O2 could favor the generation of Ni(II/III) hydroxides in the first stage, enhancing the subsequential removal of the Ni2+. These results can lead to a promising strategy for the removal and recovery of complex Ni from industrial wastewater.
Collapse
Affiliation(s)
- Peixuan Yu
- Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, 200241, PR China
| | - Huixin Shao
- College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, PR China
| | - Yiran Feng
- Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, 200241, PR China
| | - Yabo Liu
- Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, 200241, PR China
| | - Peng Fan
- Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201204, PR China
| | - Hejie Qin
- Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, 200241, PR China; Institute of Eco-Chongming, Shanghai, 200062, PR China.
| | - Xiaohong Guan
- Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, 200241, PR China; Institute of Eco-Chongming, Shanghai, 200062, PR China
| |
Collapse
|
3
|
Harb H, Surendran Assary R. Systematic improvement of redox potential calculation of Fe(III)/Fe(II) complexes using a three-layer micro-solvation model. Phys Chem Chem Phys 2025; 27:10717-10729. [PMID: 40351129 DOI: 10.1039/d5cp00454c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/14/2025]
Abstract
Electrochemical transformations of metal ions in aqueous media are challenging to model accurately due to the dynamic solvation structure surrounding ions at different charge states. Predictive modeling at the atomistic scale is essential for understanding these solvation architectures but is often computationally prohibitive. In this contribution, we present a simple, fast, and accurate three-layer micro-solvation model to evaluate the redox potential of metal ions in aqueous solutions. Our model, developed and validated for Fe3+/Fe2+ redox potentials, combines the DFT-based geometry optimizations of the octahedral Fe complex with two layers of explicit water molecules to capture solute-solvent interactions and an implicit solvation model to account for bulk solvent effects. This approach yields accurate predictions for Fe3+/Fe2+ redox potentials in water, achieving errors of 0.02 V with ωB97X-V, 0.01 V with ωB97X-D3, 0.04 V with ωB97M-V, and 0.02 V with B3LYP-D3 functionals. We further demonstrate the generality of our model by applying it to additional metal complexes, including the challenging Fe(CN)63-/4- system, where our model successfully achieves close agreement with experimental values, with an error of 0.07 V and an average error of 0.21 V for all five systems. In summary, the presented simple solvation model has broad applicability and potential for enhancing computational efficiency in redox potential predictions across various chemical and industrial processes of metal ions.
Collapse
Affiliation(s)
- Hassan Harb
- Materials Science Division, Argonne National Laboratory, Lemont, IL 60439, USA.
| | | |
Collapse
|
4
|
Wang J, Fu P, Yang S, Shao X, Liu L, Zhao Y. Decomplexation of typical metal-organic complexes and simultaneous recovery of heavy metals: The role of reduction. JOURNAL OF HAZARDOUS MATERIALS 2025; 494:138636. [PMID: 40378738 DOI: 10.1016/j.jhazmat.2025.138636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2025] [Revised: 04/19/2025] [Accepted: 05/13/2025] [Indexed: 05/19/2025]
Abstract
Decomplexation is an essential step in eliminating complex heavy metals commonly found in wastewater. While advanced oxidation processes targeting ligand degradation have been predominantly investigated, the innovative strategy of initiating decomplexation through metal-end reduction with simultaneous metal recovery, remains underexplored yet scientifically compelling. A critical research priority lies in systematically identifying metal-organic complexes amenable to this reductive approach. This study systematically investigated the decomplexation performance and mechanism of six typical metal-organic complexes utilizing a carbon-modified zero-valent aluminum composite (C@mZVAl), a novel reductant demonstrating potent reducing capabilities. Dual mechanisms were identified: electron-mediated reduction and Al3 +-induced substitution. Decomplexation efficacy was governed by both the metal's redox potentials and the logarithmic complex stability constant (logK). The reduction and recovery of metal elements in silver and copper complexes could occur as zero-valent species, with a recovery degree exceeding 80 %. However, for nickel complexes, the reduction phenomenon was not observed because the redox potential of nickel is too low. In summary, this study innovatively started from the reduction of metal ends to remove and recover complex heavy metals, thereby offering valuable insights into the effective treatment of such type of wastewater.
Collapse
Affiliation(s)
- Jiaqi Wang
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Peiyao Fu
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Shiying Yang
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China; Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering (MEGE), Qingdao 266100, China; Key Laboratory of Marine Environment and Ecology, Ministry of Education, Qingdao 266100, China.
| | - Xueting Shao
- Technical Centre for Soil, Agriculture and Rural Ecology and Environment, Ministry of Ecology and Environment of the People's Republic of China, Beijing 100035, China
| | - Lecheng Liu
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China; Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering (MEGE), Qingdao 266100, China; Key Laboratory of Marine Environment and Ecology, Ministry of Education, Qingdao 266100, China
| | - Yue Zhao
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China; Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering (MEGE), Qingdao 266100, China; Key Laboratory of Marine Environment and Ecology, Ministry of Education, Qingdao 266100, China
| |
Collapse
|
5
|
Deng W, Lv X, Xu Z, Zhang Q, Zhao M, Huang X. Recovery of heavy metal complexes from wastewaters: A critical review of mechanisms and technologies. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2025; 382:125339. [PMID: 40239352 DOI: 10.1016/j.jenvman.2025.125339] [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: 11/28/2024] [Revised: 04/05/2025] [Accepted: 04/10/2025] [Indexed: 04/18/2025]
Abstract
Heavy metal complexes (HMCs) pose significant ecological challenges while also holding attractive economic value. This review comprehensively summarizes advanced techniques for recovering HMCs from wastewater, including reductive recovery, oxidative decomplexation-recovery, and non-redox separation. Physical and chemical separation approaches utilize specific properties of metal complexes for efficient segregation. Specifically, we explore oxidative decomposition techniques, emphasizing the underlying mechanisms and practical application for selective and non-selective decomplexation techniques. The crucial role of cathodic potential on the efficiency and selectivity of electrochemical reduction processes is also examined. In addition, a comprehensive cost assessment, including energy consumption, associated with these recovering processes is investigated, and opinions on the inadequacy of current studies are provided. Overall, this review uniquely integrates findings on selective physical separation, oxidation, and reduction processes as well as the cost assessments for these techniques, providing a novel and comprehensive perspective on heavy metal recovery. It aims to bridge existing gaps in literature and advance the development of effective recovery methodologies for HMCs.
Collapse
Affiliation(s)
- Wei Deng
- National and Local Joint Engineering Research Center of Ecological Treatment Technology for Urban Water Pollution, College of Life and Environmental Science, Wenzhou University, Wenzhou, 325035, China; School of Engineering, University of Northern British Columbia, 3333 University Way, V2N 4Z9, British Columbia, Canada
| | - Xiaoli Lv
- National and Local Joint Engineering Research Center of Ecological Treatment Technology for Urban Water Pollution, College of Life and Environmental Science, Wenzhou University, Wenzhou, 325035, China
| | - Zhe Xu
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou, 510006, China.
| | - Qingrui Zhang
- Hebei Key Laboratory of Applied Chemistry, Hebei Key Laboratory of Heavy Metal Deep-Remediation in Water and Resource Reuse, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao, 066004, China
| | - Min Zhao
- National and Local Joint Engineering Research Center of Ecological Treatment Technology for Urban Water Pollution, College of Life and Environmental Science, Wenzhou University, Wenzhou, 325035, China.
| | - Xianfeng Huang
- National and Local Joint Engineering Research Center of Ecological Treatment Technology for Urban Water Pollution, College of Life and Environmental Science, Wenzhou University, Wenzhou, 325035, China.
| |
Collapse
|
6
|
Zhu S, Xu H, Khan MS, Xia M, Wang F, Chen Y. Enhanced removal of Ni 2+ and Co 2+ from wastewater using a novel 2-hydroxyphosphonoacetic acid modified Mg/Fe-LDH composite adsorbent. WATER RESEARCH 2025; 272:122997. [PMID: 39706061 DOI: 10.1016/j.watres.2024.122997] [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: 07/10/2024] [Revised: 11/16/2024] [Accepted: 12/16/2024] [Indexed: 12/23/2024]
Abstract
While technological advancements in treating electroplating wastewater continue, removing high concentrations of Ni2+ and Co2+ remains a challenge. Surface functionalization of clay has emerged as a pivotal approach for effectively removing heavy metals, rivaling intercalation modification in its effectiveness. This study investigated the adsorption performance and mechanisms of a phosphonate-modified layered double hydroxide material, employing batch experiments and simulation calculations to elucidate the impact of surface modification on adsorption behavior. Briefly, various characterization techniques confirmed that the layered double hydroxide synthesized through co-precipitation exhibited a sheet-like morphology, with phosphonate groups anchoring onto the clay surface following functionalization. Under optimal conditions (pH=6.0, t = 60 min, and C0=300 mg/L), the material demonstrated high uptake capacities for Ni2+ (198.01 mg/g) and Co2+ (180.18 mg/g), surpassing most previously reported adsorbents. The adsorption kinetics for Ni2+ and Co2+ on the modified material followed a pseudo-second-order model, and the isotherms conformed to the Langmuir equation, indicating a monolayer chemical adsorption process. Moreover, after five adsorption-desorption cycles, the adsorbent demonstrated exceptional reusability and stability, and its potential for practical application preliminarily assessed using electroplating wastewater containing Ni2+. To further clarify the adsorption mechanism, a molecular dynamics simulation employing the CLAYFF-CVFF force field was conducted to examine the electrostatic interaction of modifiers at the clay surface. Wavefunction analyses derived from quantum chemical calculations provided insights into interactions, identified molecular reactive sites, and elucidated orbital interactions within chelation complexes. This research presents a feasible approach for developing high-performance materials for wastewater remediation in practical applications.
Collapse
Affiliation(s)
- Sidi Zhu
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, PR China; Department of Chemical and Biomolecular Engineering, College of Design and Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585, Singapore
| | - Haihua Xu
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, PR China
| | - M Shahnawaz Khan
- Department of Chemical and Biomolecular Engineering, College of Design and Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585, Singapore
| | - Mingzhu Xia
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, PR China.
| | - Fengyun Wang
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, PR China.
| | - Yexiang Chen
- Department of Neurobiology and Acupuncture Research, The Third Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, 310053, PR China.
| |
Collapse
|
7
|
Huang LZ, Li J, Chen W, Deng J, Zhang F. Ni(0) formation on carbon felt cathode triggers redox synergetic degradation of Ni-EDTA during electrochemical treatment for Ni-plating wastewater. JOURNAL OF HAZARDOUS MATERIALS 2025; 485:136851. [PMID: 39689565 DOI: 10.1016/j.jhazmat.2024.136851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2024] [Revised: 11/07/2024] [Accepted: 12/10/2024] [Indexed: 12/19/2024]
Abstract
Ni organic complexes are widely used in industrial production, posing severe threats to the natural environment and human health. In this work, we found that Ni (0) formed by the decomplexation and reduction of typical Ni organic complexes (Ni-EDTA) on the surface of carbon felt cathode. The formed Ni(0) as a catalytic site generates atomic hydrogen (H•) with strong reductive reactivity via electron transfer. H• not only accelerates the oxygen activation to form H2O2 on carbon felt cathode, but also reacts with H2O2 to generate strong oxidative hydroxyl radicals (HO•) and singlet oxygen (1O2). Under the attack of multiple active species, 95.5 % of Ni-EDTA is removed, and the removal efficiencies of total organic carbon (TOC) and dissolved Ni reach 43.8 % and 77.1 % after 120 min of electrolysis at -2.0 V (vs. Ag/AgCl). The redox synergistic reaction, initiated by the formation of Ni(0) on the carbon felt cathode, demonstrates excellent stability in treating real Ni plating wastewater. This approach eliminates the need for additional chemical reagents and prevents the release of heavy metals. Our findings offer a novel strategy for leveraging the self-transformation of Ni organic complexes to generate various active species for electrochemical treatment of Ni plating wastewater.
Collapse
Affiliation(s)
- Li-Zhi Huang
- School of Civil Engineering, Wuhan University, No. 8, East Lake South Road, Wuhan 430072, PR China
| | - Junpeng Li
- School of Civil Engineering, Wuhan University, No. 8, East Lake South Road, Wuhan 430072, PR China
| | - Weiguo Chen
- School of Civil Engineering, Wuhan University, No. 8, East Lake South Road, Wuhan 430072, PR China
| | - Jia Deng
- School of Civil Engineering, Wuhan University, No. 8, East Lake South Road, Wuhan 430072, PR China.
| | - Fang Zhang
- School of Environment, Tsinghua University, Beijing 100084, PR China.
| |
Collapse
|
8
|
Mu Y, Tong X, Guan Y, Yu Q, Ren W, Tian L, Pei H, Zhang S, Yang L, Li H, Zhang L, Zou JP. Simultaneous Copper and EDTA Ligands Recovery from Electroless Effluent with Metallic Copper and Formaldehyde. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2025; 59:968-977. [PMID: 39807581 DOI: 10.1021/acs.est.4c09970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2025]
Abstract
The traditional treatment of toxic and refractory copper(II)-ethylenediaminetetraacetic acid chelate (Cu(II)-EDTA) in electroless effluents often generates hazardous waste and secondary nitrogen-containing pollutants without maximizing the resource recovery. This study demonstrates a facile strategy to simultaneously recover Cu and EDTA ligands from Cu(II)-EDTA electroless effluent with commercially available metallic Cu and formaldehyde. In this strategy, metallic Cu is used to activate formaldehyde, a prevalent yet often overlooked cocontaminant in Cu(II)-EDTA effluents, to produce highly reductive hydrogen radical (•H), which in situ decomplex Cu(II)-EDTA, reduces the central Cu(II) into metallic Cu, and release EDTA ligand. Impressively, this strategy can recover 99.9% of Cu from a real Cu(II)-EDTA effluent (∼2000 mg/L) as a high-purity Cu powder without further treatment, and 99.2% of EDTA from a real Cu(II)-EDTA effluent using a precipitation-acidification post-treatment procedure, earning a net profit of US $72.38 per ton. The proposed approach offers a "pollution-curing-pollution" solution to transform chelated metal waste into valuable resources.
Collapse
Affiliation(s)
- Yi Mu
- Key Laboratory of Jiangxi Province for Persistent Pollutants Prevention Control and Resource Reuse, Nanchang Hangkong University, Nanchang 330063, China
| | - Xinlu Tong
- Key Laboratory of Jiangxi Province for Persistent Pollutants Prevention Control and Resource Reuse, Nanchang Hangkong University, Nanchang 330063, China
| | - Yingying Guan
- Key Laboratory of Jiangxi Province for Persistent Pollutants Prevention Control and Resource Reuse, Nanchang Hangkong University, Nanchang 330063, China
| | - Qianghua Yu
- Key Laboratory of Jiangxi Province for Persistent Pollutants Prevention Control and Resource Reuse, Nanchang Hangkong University, Nanchang 330063, China
| | - Wei Ren
- Key Laboratory of Jiangxi Province for Persistent Pollutants Prevention Control and Resource Reuse, Nanchang Hangkong University, Nanchang 330063, China
| | - Lei Tian
- Key Laboratory of Jiangxi Province for Persistent Pollutants Prevention Control and Resource Reuse, Nanchang Hangkong University, Nanchang 330063, China
| | - Haopeng Pei
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Shuqu Zhang
- Key Laboratory of Jiangxi Province for Persistent Pollutants Prevention Control and Resource Reuse, Nanchang Hangkong University, Nanchang 330063, China
| | - Lixia Yang
- Key Laboratory of Jiangxi Province for Persistent Pollutants Prevention Control and Resource Reuse, Nanchang Hangkong University, Nanchang 330063, China
| | - Hao Li
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Lizhi Zhang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Jian-Ping Zou
- Key Laboratory of Jiangxi Province for Persistent Pollutants Prevention Control and Resource Reuse, Nanchang Hangkong University, Nanchang 330063, China
| |
Collapse
|
9
|
Shi W, Li J, Gao F, Meng L, Su X, Wang Z. Strongly coordinating mediator enables single-step resource recovery from heavy metal-organic complexes in wastewater. Nat Commun 2024; 15:10828. [PMID: 39738045 DOI: 10.1038/s41467-024-55174-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2024] [Accepted: 12/04/2024] [Indexed: 01/01/2025] Open
Abstract
Heavy metals complexed with organic ligands are among the most critical carcinogens threatening global water safety. The challenge of efficiently and cost-effectively removing and recovering these metals has long eluded existing technologies. Here, we show a strategy of coordinating mediator-based electro-reduction (CMBER) for the single-step recovery of heavy metals from wastewater contaminated with heavy metal-organic complexes. In CMBER, amidoxime with superior coordinating abilities over traditional ligands is immobilized by an amidoximation reaction onto a flow-through electrode that concurrently functions as a filtration device. This unique process spontaneously captures heavy metal ions at the -N-OH and -NH2 groups of the amidoxime from their complexes without external energy input (ΔG of amidoxime mediator with Cu(II): -6.59 eV), followed by direct in situ electro-reduction for metal recovery. The reduction of captured Cu(II) to Cu(0) regenerates the amidoxime's active sites, enabling continuous capture of Cu(II). Operating at a voltage of 3 V and a water flux of 250 L m-2 h-1, the CMBER system achieves a Cu(II) recovery rate of 97.6% and demonstrates an energy efficiency of 340.1 g kWh-1. This energy efficiency significantly outperforms existing technologies, showing a nearly fivefold improvement. CMBER creates a new dimension for cost-effective resource recovery and water purification.
Collapse
Affiliation(s)
- Wei Shi
- State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai, 200092, China
- School of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
| | - Jiayi Li
- School of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
| | - Fei Gao
- School of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
| | - Lijun Meng
- School of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
- Shanghai Institute of Pollution Control and Ecological Security, Tongji University, Shanghai, 200092, China
| | - Xiao Su
- Department of Chemical and Biomolecular Engineering, University of Illinois Urbana-Champaign, Urbana, IL, 61820, USA
| | - Zhiwei Wang
- State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai, 200092, China.
- School of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China.
- Shanghai Institute of Pollution Control and Ecological Security, Tongji University, Shanghai, 200092, China.
| |
Collapse
|
10
|
Mao R, Hu K, Kan H, Yan L, Chen R, Zhao X. Self-catalytic enhancement of Cu-EDTA decomplexation and simultaneous Cu recovery via a dual-cathode electrochemical process. WATER RESEARCH 2024; 268:122775. [PMID: 39546976 DOI: 10.1016/j.watres.2024.122775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2024] [Revised: 11/04/2024] [Accepted: 11/07/2024] [Indexed: 11/17/2024]
Abstract
Heavy metals that are readily chelated with coexisting organic ligands in industrial wastewaters impose threats to environment and human health but are also valuable metal resources. Traditional treatment methods generally require additional chemicals and generate secondary contaminants. Here, a reagent-free dual-cathode electrochemical system was proposed for the efficient destruction of Cu-organic complexes and synchronous cathodic recovery of Cu, whereby in situ production of H2O2 at carbon aerogel (CA) cathode was coupled with the reduction of Cu(II) to Cu(I) and finally to Cu(0) at Ti cathode. The intermediate Cu(II) complexes enabled the self-reinforced degradation owing to their higher activities toward •OH generation by activating H2O2 in contrast to initial Cu-ethylenediaminetetraacetic acid (Cu-EDTA). The enhanced production of Cu(I) by Ti cathode facilitated both •OH and Cu(III) formation, and the copper redox cycle was realized in the self-reinforced system, maintaining its sustainable catalytic activity. The energy cost of the dual-cathode system is 0.011 kWh/g for decomplexation and 0.057 kWh/g for Cu recovery, which is much lower than single Ti or CA cathode system. This established process provides a prospective approach for cost-effective destruction of chelating metal complexes and metal resources recovery from heavy metal wastewaters.
Collapse
Affiliation(s)
- Ran Mao
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Ke Hu
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, PR China; Key Laboratory of Advanced Functional Materials, Faculty of Materials and Manufacture, Beijing University of Technology, Beijing 100124, PR China
| | - Hongshuai Kan
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Li Yan
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China; Department of Civil and Environmental Engineering, Rice University, Houston, Texas 77005, USA
| | - Rongsen Chen
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, PR China; Key Laboratory of Advanced Functional Materials, Faculty of Materials and Manufacture, Beijing University of Technology, Beijing 100124, PR China
| | - Xu Zhao
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China.
| |
Collapse
|
11
|
Wu L, Garg S, Waite TD. Progress and challenges in the use of electrochemical oxidation and reduction processes for heavy metals removal and recovery from wastewaters. JOURNAL OF HAZARDOUS MATERIALS 2024; 479:135581. [PMID: 39216250 DOI: 10.1016/j.jhazmat.2024.135581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2024] [Revised: 08/07/2024] [Accepted: 08/18/2024] [Indexed: 09/04/2024]
Abstract
Heavy metals-laden industrial wastewater represents both a threat to ecosystems and human health and, in some instances, a potential source of valuable metals however the presence of organic ligands that bind the metals in heavy metal complexes (HMCs) renders metal removal (and, where appropriate, recovery) difficult. Electrochemical-based oxidation and reduction processes represent a potentially promising means of degrading the organic ligands and reducing their ability to retain the metals in solution. In this state-of-the-art review, we provide a comprehensive overview of the current status on use of electrochemical redox technologies for organic ligand degradation and subsequent heavy metal removal and recovery from industrial wastewaters. The principles and degradation mechanism of common organic ligands by various types of electrochemical redox technologies are discussed in this review and consideration given to recent progress in electrode materials synthesis, cell architecture, and operation of electrochemical redox systems. Furthermore, we highlight the current challenges in application of electrochemical redox technologies for treatment of HMC-containing wastewaters including (i) limited understanding of the chemical composition of industrial wastewaters, (ii) constrained mass transfer process affecting the direct/indirect electron transfer, (iii) absence of approaches to convert recovered metal into high-value-added products, and (iv) restricted semi-or full-industrial-scale application of these technologies. Potential strategies for improvement are accordingly provided to guide efforts in addressing these challenges in future research.
Collapse
Affiliation(s)
- Lei Wu
- UNSW Centre for Transformational Environmental Technologies, Yixing, Jiangsu Province 214206, PR China; UNSW Water Research Centre, School of Civil and Environmental Engineering, University of New South Wales, Sydney, NSW 2052, Australia
| | - Shikha Garg
- UNSW Water Research Centre, School of Civil and Environmental Engineering, University of New South Wales, Sydney, NSW 2052, Australia
| | - T David Waite
- UNSW Centre for Transformational Environmental Technologies, Yixing, Jiangsu Province 214206, PR China; UNSW Water Research Centre, School of Civil and Environmental Engineering, University of New South Wales, Sydney, NSW 2052, Australia.
| |
Collapse
|
12
|
Lin Z, Xiao Z, Liu Y, Wang Y, Chen S, Zhang J, Chen Y, Zhang X, Zhang G, Li D, Lv W, Chen P, Liu G. Insights into copper(I) phenylacetylide with in-situ transformation of oxygen and enhanced visible-light response for water decontamination: Cu-O bond promotes exciton dissociation and charge transfer. J Colloid Interface Sci 2024; 671:1-14. [PMID: 38788420 DOI: 10.1016/j.jcis.2024.05.159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Revised: 05/14/2024] [Accepted: 05/21/2024] [Indexed: 05/26/2024]
Abstract
The widespread contamination of hexavalent chromium (Cr(VI)), pharmaceuticals and personal care products (PPCPs), and dyes is a growing concern. necessitating the development of convenient and effective technologies for their removal. Copper(I) phenylacetylide (PhC2Cu) has emerged as a promising photocatalyst for environmental remediation. In this study, we introduced a functional Cu-O bond into PhC2Cu (referred to as OrPhC2Cu) by creatively converting the adsorbed oxygen on the surface of PhC2Cu into a Cu-O bond to enhance the efficiency of Cr(VI) photoreduction, PPCPs photodegradation, and dyes photodegradation through a facile vacuum activating method. The incorporation of the Cu-O bond optimized the electron structure of OrPhC2Cu, facilitating exciton dissociation and charge transfer. The exciton dissociation behavior and charge transfer mechanism were systematically investigated for the first time in the OrPhC2Cu system by photoelectrochemical tests, fluorescence and phosphorescence (PH) techniques, and density functional theory (DFT) calculations. Remarkably, the enhanced visible-light response of OrPhC2Cu improved photon utilization and significantly promoted the generation of reactive species (RSs), leading to the highly efficient Cr(VI) photoreduction (98.52% within 25 min) and sulfamethazine photodegradation (94.65% within 60 min), with 3.91 and 5.23 times higher activity compared to PhC2Cu. Additionally, the photocatalytic efficiency of OrPhC2Cu in degrading anionic dyes surpassed that of cationic dyes. The performance of the OrPhC2Cu system in treating electroplating effluent or natural water bodies suggests its potential for practical applications.
Collapse
Affiliation(s)
- Zili Lin
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Zhenjun Xiao
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Yang Liu
- School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, China
| | - Yishun Wang
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Shuyue Chen
- College of Resources and Environment, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China
| | - Jinfan Zhang
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Yingyi Chen
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Xiaoyu Zhang
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Ge Zhang
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Daguang Li
- School of Light Chemical Industry and Materials, Shunde Polytechnic, Foshan 528333, China
| | - Wenying Lv
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Ping Chen
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China.
| | - Guoguang Liu
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China.
| |
Collapse
|
13
|
Li J, Gong H, Wei Y, Ma J, Li XG, Pan M, Zhou M. High energy-efficiency decomplexation of metal-complexes by H*-mediated electro-reduction on hydroxyphenyl Co-porphyrin catalysts. JOURNAL OF HAZARDOUS MATERIALS 2024; 476:135227. [PMID: 39029195 DOI: 10.1016/j.jhazmat.2024.135227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2024] [Revised: 06/17/2024] [Accepted: 07/14/2024] [Indexed: 07/21/2024]
Abstract
Electrochemical reduction of metal-organic complex pollutants has been recognized as an environmental benign method that operates at mild condition. However, the selective reduction of metal complexes and energy consumption in cathodic process are still a big challenge. Herein, we found that hydroxyphenyl Co-porphyrin catalyst (CoTH@NG) realizes the highly selective decomplexation of metal-organic complexes by H* -mediated reduction, and simultaneously the impressive recovery efficiency of metal ions. Density functional theory (DFT) confirms the generation and capturing ability of H* on CoTH@NG, verifying the dominant role of H* -mediated reduction in the selective decomplexation of Cu-EDTA. CoTH@NG realizes the superior energy efficiency for Cu-EDTA removal (279.3 g kWh-1 of EEOCu-EDTA) and Cu recovery (48.6 g kWh-1 of EEOCu), which are remarkably 3.3 × 102 and 9.7 × 102 times higher than traditional carbon cloth electrode. Moreover, the recovered Cu0(s) nanowires on the electrode surface can be efficiently regenerated in HCOOH by a galvanic reaction through the electron channel of CoTH@NG, regenerating catalytic electrode. This is one of the pioneer studies on H* -mediated electro-reduction decomplexation of metal-complexes, metal recovery, and electrode regeneration on CoTH@NG, which providing a technical strategy for developing efficient electrocatalytic system for pollution control. Environmental Implication Metal complexes is a dramatic increase in the electroplating and mining industries, and seriously affect both public health and environmental sustainability. Our work reported a new hydroxyphenyl Co-porphyrin catalyst (CoTH@NG) which achieves the selective decomplexation of metal-organic complexes, and simultaneously the recovery of metal ions. CoTH@NG realizes the superior energy efficiency for Cu-EDTA removal (279.3 g kWh-1) and Cu0(s) recovery (48.6 g kWh-1), which are remarkably 3.3 × 102 and 9.7 × 102 times higher than traditional carbon cloth electrode. Moreover, the recovered Cu0(s) can be efficiently regenerated in HCOOH by a galvanic reaction through the electron channel of CoTH@NG, regenerating catalytic electrode.
Collapse
Affiliation(s)
- Junjian Li
- College of Environment, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, China; Research Center for Environmental Functional Materials, State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China
| | - Hanwen Gong
- College of Environment, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, China
| | - Yuxuan Wei
- College of Environment, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, China
| | - Jie Ma
- Research Center for Environmental Functional Materials, State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China
| | - Xin-Gui Li
- Research Center for Environmental Functional Materials, State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China
| | - Meilan Pan
- College of Environment, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, China.
| | - Minghua Zhou
- Key Laboratory of Pollution Process and Environmental Criteria, Ministry of Education, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.
| |
Collapse
|
14
|
Guo Y, Feng H, Zhang L, Wu Y, Lan C, Tang J, Wang J, Tang L. Insights into the Mechanism of Selective Removal of Heavy Metal Ions by the Pulsed/Direct Current Electrochemical Method. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:5589-5597. [PMID: 38485130 DOI: 10.1021/acs.est.3c10553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/27/2024]
Abstract
Heavy metal pollution treatment in industrial wastewater is crucial for protecting biological and environmental safety. However, the highly efficient and selective removal of heavy metal ions from multiple cations in wastewater is a significant challenge. This work proposed a pulse electrochemical method with a low-/high-voltage periodic appearance to selectively recover heavy metal ions from complex wastewater. It exhibited a higher recovery efficiency for heavy metal ions (100% for Pb2+ and Cd2+, >98% for Mn2+) than other alkali and alkaline earth metal ions (Na+, Ca2+, and Mg2+ were kept below 3.6, 1.3, and 2.6%, respectively) in the multicomponent solution. The energy consumption was only 34-77% of that of the direct current electrodeposition method. The results of characterization and experiment unveil the mechanism that the low-/high-voltage periodic appearance can significantly suppress the water-splitting reaction and break the mass-transfer limitation between heavy metal ions and electrodes. In addition, the plant study demonstrates the feasibility of treated wastewater for agricultural use, further proving the high sustainability of the method. Therefore, it provides new insights into the selective recovery of heavy metals from industrial wastewater.
Collapse
Affiliation(s)
- Yuyao Guo
- College of Environmental Science and Engineering, Hunan University & Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Haopeng Feng
- College of Environmental Science and Engineering, Hunan University & Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Lingyue Zhang
- School of Environment, Tsinghua University, Beijing 100084, China
| | - Yangfeng Wu
- College of Environmental Science and Engineering, Hunan University & Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Chenrui Lan
- College of Environmental Science and Engineering, Hunan University & Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Jing Tang
- College of Environmental Science and Engineering, Hunan University & Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Jiajia Wang
- College of Environmental Science and Engineering, Hunan University & Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Lin Tang
- College of Environmental Science and Engineering, Hunan University & Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| |
Collapse
|
15
|
Zhang Y, Li D, She L, Guo F, Jia F, Zhang L, Ai Z, Liu X. Ball-milled zero-valent iron with formic acid for effectively removing Cu(II)-EDTA accomplished by EDTA ligands oxidative degradation and Cu(II) removal. JOURNAL OF HAZARDOUS MATERIALS 2024; 465:133009. [PMID: 38029587 DOI: 10.1016/j.jhazmat.2023.133009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 10/25/2023] [Accepted: 11/12/2023] [Indexed: 12/01/2023]
Abstract
Heavy metal complexes in industrial wastewater are challenging to be removed by conventional methods arising from their stable chelating structure. In this study, zero-valent iron (ZVI) was ball-milled with tiny formic acid (FA), and the as-prepared sample (FA-ZVIbm) was attempted to eliminate a model heavy metal complex of Cu(II)-ethylenediaminetetraacetic acid (Cu(II)-EDTA). The addition of FA to ball-milling could dramatically enhance the performance of ball-milled ZVI (ZVIbm) towards Cu(II)-EDTA removal and increase the removal rate constant by 80 times. This conspicuous improvement of Cu(II)-EDTA elimination was attributed to the ferrous formate (Fe(HCOO)2) shell formed on the surface of FA-ZVIbm. Results revealed that the Fe(HCOO)2 shell facilitated the activation of O2 to reactive oxygen species (ROS) and the leaching of Fe3+. Cu(II)-EDTA was decomplexed through both oxidative destruction and Fe3+ replacement, and the released Cu2+ was reduced by FA-ZVIbm and immobilized synchronously. Meanwhile, the ligands underwent oxidative degradation by ROS, thus avoiding the re-chelation ecological risk. Impressively, FA-ZVIbm could achieve cyclic treatment of actual copper complex wastewater and possessed promising advantage in treatment cost. This study would offer a promising approach for eliminating Cu(II)-EDTA through EDTA ligands degradation and synchronous Cu(II) removal, moreover to shed light on the decomplexation mechanism.
Collapse
Affiliation(s)
- Yuhang Zhang
- College of Chemistry, Central China Normal University, Wuhan 430079, PR China
| | - Donglei Li
- College of Chemistry, Central China Normal University, Wuhan 430079, PR China
| | - Liang She
- College of Chemistry, Central China Normal University, Wuhan 430079, PR China
| | - Furong Guo
- College of Chemistry, Central China Normal University, Wuhan 430079, PR China
| | - Falong Jia
- College of Chemistry, Central China Normal University, Wuhan 430079, PR China.
| | - Lizhi Zhang
- College of Chemistry, Central China Normal University, Wuhan 430079, PR China
| | - Zhihui Ai
- College of Chemistry, Central China Normal University, Wuhan 430079, PR China
| | - Xiao Liu
- College of Chemistry, Central China Normal University, Wuhan 430079, PR China
| |
Collapse
|
16
|
Sun W, Li J, Chen Z, Wang S, Lichtfouse E, Liu H. Decomposition of metal-organic complexes and metal recovery in wastewater: A systematic review and meta-synthesis. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 914:169582. [PMID: 38154646 DOI: 10.1016/j.scitotenv.2023.169582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 12/09/2023] [Accepted: 12/20/2023] [Indexed: 12/30/2023]
Abstract
Metals are rarely found as free ions in natural and anthropogenic environments, but they are often associated with organic matter and minerals. Under the context of circular economy, metals should be recycled, yet they are difficult to extract for their complex forms in real situations. Based on the protocols of review methodology and the analysis of VOS viewer, there are few reviews on the properties of metal-organic complexes, decomplexation methods, the effect of coexisting ions, the pH influence, and metal recovery methods for the increasingly complicated metal-organic complexes wastewater. Conventional treatment methods such as flocculation, adsorption, biological degradation, and ion exchange fail to decompose metal-organic complexes completely without causing secondary pollution in wastewater. To enhance comprehension of the behavior and morphology exhibited by metal-organic complexes within aqueous solutions, we presented the molecular structure and properties of metal-organic complexes, the decomplexation mechanisms that encompassed both radical and non-radical oxidizing species, including hydroxyl radical (OH), sulfate radical (SO˙4-), superoxide radical (O˙2-), hydrogen peroxide (H2O2), ozone (O3), and singlet oxygen (1O2). More importantly, we reviewed novel aspects that have not been covered by previous reviews considering the impact of operational parameters and coexisting ions. Finally, the potential avenues and challenges were proposed for future research.
Collapse
Affiliation(s)
- Wenhui Sun
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Jiao Li
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Ziang Chen
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Shuwen Wang
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Eric Lichtfouse
- State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Hongbo Liu
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China.
| |
Collapse
|
17
|
Wu L, Garg S, Waite TD. Electrochemical treatment of wastewaters containing metal-organic complexes: A one-step approach for efficient metal complex decomposition and selective metal recovery. JOURNAL OF HAZARDOUS MATERIALS 2024; 466:133526. [PMID: 38278072 DOI: 10.1016/j.jhazmat.2024.133526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 12/13/2023] [Accepted: 01/11/2024] [Indexed: 01/28/2024]
Abstract
Metal-organic complexes, especially those of ethylenediaminetetraacetic acid (EDTA) with metals such as copper (Cu) and nickel (Ni) (denoted here as Cu-EDTA and Ni-EDTA), are common contaminants in wastewaters from chemical and plating industries. In this study, a multi-electrode (ME) system using a two-chamber reactor and two pairs of electrodes is proposed for simultaneous electrochemical oxidation of a wastewater containing both Cu-EDTA and Ni-EDTA complexes as well as separation and selective recovery of Cu and Ni onto two different cathodes via electrodeposition. Our results demonstrate that the ME system successfully achieved 90% EDTA removal, 99% solid Cu recovery at the Cu recovery cathode and 56% Ni recovery (33.3% on the Ni recovery cathode and 22.6% in the solution) after a four-hour operation. The system further achieved 85.5% Ni recovery after consecutive five cycles of operation for 20 h. While Cu removal was mainly driven by the direct reduction of EDTA-complexed Cu(II) at the cathode, oxidation of EDTA within the Ni-EDTA complex at the anode was a prerequisite for Ni removal. The oxidation of metal-bound EDTA and free EDTA was driven by •OH and direct electron transfer on the PbO2 anode surface and graphite anode, respectively. We further show that ME system performs well for all pH conditions, treatment of real wastewaters as well as wastewaters containing other metals ions (Cr and Zn) along with Cu/Ni. The separation efficiency of Cu and Ni is dependent on applied electrode potential as well as nature and concentration of binding ligand present with comparatively lower separation efficiency achieved in the presence of weaker binding capacity and/or at lower ligand concentration and lower applied electrode potential. As such, some optimization of electrode potential is required depending on the nature/concentration of ligands in the wastewaters. Overall, this study provides new insights into the design and operation of EAOP technology for effective organic abatement and metal recovery from wastewaters containing mixtures of various metal-organic complexes.
Collapse
Affiliation(s)
- Lei Wu
- UNSW Centre for Transformational Environmental Technologies, Yixing, Jiangsu 214206, PR China; UNSW Water Research Centre, School of Civil and Environmental Engineering, University of New South Wales, Sydney, NSW 2052, Australia
| | - Shikha Garg
- UNSW Water Research Centre, School of Civil and Environmental Engineering, University of New South Wales, Sydney, NSW 2052, Australia
| | - T David Waite
- UNSW Centre for Transformational Environmental Technologies, Yixing, Jiangsu 214206, PR China; UNSW Water Research Centre, School of Civil and Environmental Engineering, University of New South Wales, Sydney, NSW 2052, Australia.
| |
Collapse
|
18
|
Gao Y, Wang P, Chu Y, Kang F, Cheng Y, Repo E, Feng M, Yu X, Zeng H. Redox property of coordinated iron ion enables activation of O 2 via in-situ generated H 2O 2 and additionally added H 2O 2 in EDTA-chelated Fenton reaction. WATER RESEARCH 2024; 248:120826. [PMID: 37976952 DOI: 10.1016/j.watres.2023.120826] [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: 07/05/2023] [Revised: 10/20/2023] [Accepted: 11/02/2023] [Indexed: 11/19/2023]
Abstract
The Fenton system was a generation system of reactive oxygen species via the chain reactions, which employed H2O2 and O2 as radical precursors and Fe2+/Fe3+ as electron-donor/acceptor for triggering or terminating the generation of radicals. Recent work mainly emphasized the Fe2+- activated H2O2 and the application of in-situ generated •OH, while neglecting other side-reactions. In this work, EDTA (Ethylene diamine tetraacetic acid) was employed as a chelating agent of iron ions, which simultaneously changed the redox property of coordinated iron. The Fe2+-EDTA complexes in the presence of dissolved oxygen enabled the two-electron transfer from Fe2+ to O2 and the in-situ production of H2O2, which further activate H2O2 for yielding •OH. Meanwhile, coordinated Fe3+ exhibited non-negligible reactivity toward H2O2, which was higher than that of free Fe3+ in the traditional Fenton system. The complexation of EDTA with Fe3+ could enhance the Fe2+ generation reaction by the H2O2, accompanied by the O2•- formation. The enhancement of O2•- formation and Fe2+-EDTA regeneration induced the subsequent H2O2 activation by Fe2+-EDTA, thus accelerating the Fe3+-EDTA/Fe2+-EDTA cycle for simultaneously producing O2•- and •OH. To sum up, the EDTA-chelated Fenton system extended the applicable pH range to circumneutral/alkaline level and tuned the redox property of coordinated iron for diversifying the •OH production routes. The research reinterpreted the chain reactions in the Fenton system, revealing another way to enhance the radical production or other property of the Fenton/Fenton-like system.
Collapse
Affiliation(s)
- Yuan Gao
- College of the Environment & Ecology, Xiamen University, Xiamen 361102, PR China
| | - Pengyi Wang
- College of the Environment & Ecology, Xiamen University, Xiamen 361102, PR China
| | - Yu Chu
- College of the Environment & Ecology, Xiamen University, Xiamen 361102, PR China
| | - Fan Kang
- College of the Environment & Ecology, Xiamen University, Xiamen 361102, PR China
| | - Yue Cheng
- College of the Environment & Ecology, Xiamen University, Xiamen 361102, PR China
| | - Eveliina Repo
- Department of Separation Science, School of Engineering Science, Lappeenranta-Lahti University of Technology (LUT), Lappeenranta FI-53850, Finland
| | - Mingbao Feng
- College of the Environment & Ecology, Xiamen University, Xiamen 361102, PR China; Fujian Key Laboratory of Coastal Pollution Prevention and Control, Xiamen University, Xiamen 361102, PR China
| | - Xin Yu
- College of the Environment & Ecology, Xiamen University, Xiamen 361102, PR China; Fujian Key Laboratory of Coastal Pollution Prevention and Control, Xiamen University, Xiamen 361102, PR China
| | - Huabin Zeng
- College of the Environment & Ecology, Xiamen University, Xiamen 361102, PR China; Fujian Key Laboratory of Coastal Pollution Prevention and Control, Xiamen University, Xiamen 361102, PR China.
| |
Collapse
|
19
|
Liu T, Zhang C, Huo S, Zhou Y, Yi Y, Zhu G. Target-Controlled Redox Reaction and Ru(II) Release of a Smart Metal-Organic Framework Nanomaterial for Highly Sensitive Ratiometric Homogeneous Electroanalysis of Cadmium(II). Inorg Chem 2023; 62:17425-17432. [PMID: 37812810 DOI: 10.1021/acs.inorgchem.3c02760] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/11/2023]
Abstract
In this work, a highly sensitive ratiometric homogeneous electroanalysis (HEA) strategy of cadmium(II) (Cd2+) was proposed via a Cd2+-controlled redox reaction and Ru(bpy)32+ (Ru(II)) release from a smart metal-organic framework (MOF) nanomaterial. For achieving this purpose, Ru(II) was entrapped ingeniously into the pores of an MOF material (UiO-66-NH2) and subsequently gated by the double-strand hybrids of a Cd2+-aptamer (Apt) and its complementary sequences (CP) to form a novel smart nanomaterial (denoted as Ru@UiO-66-NH2); meanwhile, Fe(III) was selected as an additional probe present in electrolyte to facilitate the Ru(II) redox reaction: Fe(III) + Ru(II) → Fe(II) + Ru(III). Owing to the strong binding effect of the Cd2+ target to the specific Apt, the Apt-CP hybridization at Ru@UiO-66-NH2 would be destroyed in the presence of Cd2+, and the related Apt was further induced away from the smart nanomaterial, leading to the opening of the gate and release of Ru(II). Meanwhile, the released Ru(II) was quickly oxidized chemically by Fe(III) to Ru(III). On the basis of the generated Ru(III) and consumed Fe(III), the ratio of the reduction currents between Ru(III) and Fe(III) exhibits an enhancement and it is dependent on the level of Cd2+; thus, a novel HEA strategy of Cd2+ was then designed. Under the optimal conditions, the HEA sensor shows a wide linearity ranging from 10.0 pM to 500.0 nM, and the achieved detection limit of Cd2+ is 3.3 pM. The as-designed ratiometric HEA strategy not only offers a unique idea to realize a simple and sensitive assay for Cd2+ but also possesses significant potential as an effective tool to be introduced for other target analysis just via altering the specific Apt.
Collapse
Affiliation(s)
- Tingting Liu
- School of Emergency Management, School of the Environment and Safety Engineering, and Collaborative Innovation Center of Technology and Material of Water Treatment, Jiangsu University, Zhenjiang 212013, P. R. China
- Fujian Key Laboratory of Surface and Interface Engineering for High Performance Materials, Xiamen University, Xiamen 361005, P.R. China
| | - Conglin Zhang
- School of Emergency Management, School of the Environment and Safety Engineering, and Collaborative Innovation Center of Technology and Material of Water Treatment, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Shuhao Huo
- School of Emergency Management, School of the Environment and Safety Engineering, and Collaborative Innovation Center of Technology and Material of Water Treatment, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Yifan Zhou
- School of Emergency Management, School of the Environment and Safety Engineering, and Collaborative Innovation Center of Technology and Material of Water Treatment, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Yinhui Yi
- School of Emergency Management, School of the Environment and Safety Engineering, and Collaborative Innovation Center of Technology and Material of Water Treatment, Jiangsu University, Zhenjiang 212013, P. R. China
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, Jiangnan University, Wuxi 214122, P. R. China
- Fujian Key Laboratory of Surface and Interface Engineering for High Performance Materials, Xiamen University, Xiamen 361005, P.R. China
- State Environmental Protection Key Laboratory of Monitoring for Heavy Metal Pollutants, Changsha 410019, P.R. China
- The Key Laboratory of Spectroscopy Sensing, Ministry of Agriculture and Rural Affairs, Zhejiang University, Hangzhou 310058, P.R. China
| | - Gangbing Zhu
- School of Emergency Management, School of the Environment and Safety Engineering, and Collaborative Innovation Center of Technology and Material of Water Treatment, Jiangsu University, Zhenjiang 212013, P. R. China
| |
Collapse
|
20
|
Zhang X, Zhou M. Electro-Fenton water treatment technology for selective pollutant degradation and resourcization. Sci Bull (Beijing) 2023; 68:2151-2154. [PMID: 37634990 DOI: 10.1016/j.scib.2023.08.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/29/2023]
Affiliation(s)
- Xiuwu Zhang
- Key Laboratory of Pollution Process and Environmental Criteria (Ministry of Education), College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China; Tianjin Key Laboratory of Environmental Technology for Complex Trans-Media Pollution, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China; Tianjin Advanced Water Treatment Technology International Joint Research Center, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Minghua Zhou
- Key Laboratory of Pollution Process and Environmental Criteria (Ministry of Education), College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China; Tianjin Key Laboratory of Environmental Technology for Complex Trans-Media Pollution, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China; Tianjin Advanced Water Treatment Technology International Joint Research Center, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.
| |
Collapse
|
21
|
Zhang J, Yu C, Xu L, Zhao Z, Wu D. Electro-enhanced metal-free peroxymonosulfate activator coupled with membrane-assisted process for simultaneous Ni-EDTA decomplexation and Ni ions recovery. CHEMOSPHERE 2023; 338:139447. [PMID: 37423408 DOI: 10.1016/j.chemosphere.2023.139447] [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: 02/25/2023] [Revised: 07/05/2023] [Accepted: 07/06/2023] [Indexed: 07/11/2023]
Abstract
Electro-enhanced metal-free boron/peroxymonosulfate (B/PMS) system has demonstrated potential for efficient metal-organic complexes degradation in an eco-friendly way. However, the efficiency and durability of the boron activator are limited by associated passivation effect. Additionally, the lack of suitable methods utilizing in-situ recovery of metal ions liberated from decomplexation causes huge resource waste. In this study, B/PMS coupled with a customized flow electrolysis membrane (FEM) system is proposed to address above challenges with Ni-EDTA used as the model contaminant. Electrolysis is confirmed to remarkably promote the activation performance of boron towards PMS to efficiently generate •OH which dominated Ni-EDTA decomplexation in the anode chamber. It is revealed that the acidification near the anode electrode improves the stability of boron by inhibiting passivation layer growth. Under optimal parameters (10 mM PMS, 0.5 g/L boron, initial pH = 2.3, current density = 68.87 A/m2), 91.8% of Ni-EDTA could be degraded in 40 min, with a kobs of 6.25 × 10-2 min-1. As the decomplexation proceeds, nickel ions are recovered in the cathode chamber with little interference from the concentration of co-existing cations. These findings provide a promising and sustainable strategy for simultaneous metal-organic complexes removal and metal resources recovery.
Collapse
Affiliation(s)
- Jiaming Zhang
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science & Engineering, Tongji University, Shanghai, 200092, PR China.
| | - Chao Yu
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science & Engineering, Tongji University, Shanghai, 200092, PR China.
| | - Longqian Xu
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science & Engineering, Tongji University, Shanghai, 200092, PR China.
| | - Zhenyu Zhao
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science & Engineering, Tongji University, Shanghai, 200092, PR China.
| | - Deli Wu
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science & Engineering, Tongji University, Shanghai, 200092, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, PR China.
| |
Collapse
|
22
|
Li M, Shi Q, Song N, Xiao Y, Wang L, Chen Z, James TD. Current trends in the detection and removal of heavy metal ions using functional materials. Chem Soc Rev 2023; 52:5827-5860. [PMID: 37531220 DOI: 10.1039/d2cs00683a] [Citation(s) in RCA: 41] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/04/2023]
Abstract
The shortage of freshwater resources caused by heavy metal pollution is an acute global issue, which has a great impact on environmental protection and human health. Therefore, the exploitation of new strategies for designing and synthesizing green, efficient, and economical materials for the detection and removal of heavy metal ions is crucial. Among the various methods for the detection and removal of heavy ions, advanced functional systems including nanomaterials, polymers, porous materials, and biomaterials have attracted considerable attention over the past several years due to their capabilities of real-time detection, excellent removal efficiency, anti-interference, quick response, high selectivity, and low limit of detection. In this tutorial review, we review the general design principles underlying the aforementioned functional materials, and in particular highlight the fundamental mechanisms and specific examples of detecting and removing heavy metal ions. Additionally, the methods which enhance water purification quality using these functional materials have been reviewed, also current challenges and opportunities in this exciting field have been highlighted, including the fabrication, subsequent treatment, and potential future applications of such functional materials. We envision that this tutorial review will provide invaluable guidance for the design of functional materials tailored towards the detection and removal of heavy metals, thereby expediting the development of high-performance materials and fostering the development of more efficient approaches to water pollution remediation.
Collapse
Affiliation(s)
- Meng Li
- Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science and Engineering, North China Electric Power University, Baoding, 071003, P. R. China.
| | - Quanyu Shi
- Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science and Engineering, North China Electric Power University, Baoding, 071003, P. R. China.
| | - Ningxin Song
- Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science and Engineering, North China Electric Power University, Baoding, 071003, P. R. China.
| | - Yumeng Xiao
- Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science and Engineering, North China Electric Power University, Baoding, 071003, P. R. China.
| | - Lidong Wang
- Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science and Engineering, North China Electric Power University, Baoding, 071003, P. R. China.
| | - Zhijun Chen
- Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Material Science and Engineering College, Northeast Forestry University, Hexing Road 26, Harbin 150040, P. R. China.
| | - Tony D James
- Department of Chemistry, University of Bath, Bath, BA2 7AY, UK.
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, P. R. China
| |
Collapse
|
23
|
Wu L, Garg S, Xie J, Zhang C, Wang Y, Waite TD. Electrochemical Removal of Metal-Organic Complexes in Metal Plating Wastewater: A Comparative Study of Cu-EDTA and Ni-EDTA Removal Mechanisms. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:12476-12488. [PMID: 37578119 DOI: 10.1021/acs.est.3c02550] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/15/2023]
Abstract
Cu and Ni complexes with ethylenediaminetetraacetic acid (Cu/Ni-EDTA), which are commonly present in metal plating industry wastewaters, pose a serious threat to both the environment and human health due to their high toxicity and low biodegradability. In this study, the treatment of solutions containing either or both Cu-EDTA and Ni-EDTA using an electrochemical process is investigated under both oxidizing and reducing electrolysis conditions. Our results indicate that Cu-EDTA is decomplexed as a result of the cathodic reduction of Cu(II) with subsequent electrodeposition of Cu(0) at the cathode when the cathode potential is more negative than the reduction potential of Cu-EDTA to Cu(0). In contrast, the very negative reduction potential of Ni-EDTA to Ni(0) renders the direct reduction of EDTA-complexed Ni(II) at the cathode unimportant. The removal of Ni during the electrolysis process mainly occurs via anodic oxidation of EDTA in Ni-EDTA, with the resulting formation of low-molecular-weight organic acids and the release of Ni2+, which is subsequently deposited as Ni0 on the cathode. A kinetic model incorporating the key reactions occurring in the electrolysis process has been developed, which satisfactorily describes EDTA, Cu, Ni, and TOC removal. Overall, this study improves our understanding of the mechanism of removal of heavy metals from solution during the electrochemical advanced oxidation of metal plating wastewaters.
Collapse
Affiliation(s)
- Lei Wu
- UNSW Centre for Transformational Environmental Technologies, Yixing, Jiangsu Province 214206, P. R. China
- UNSW Water Research Centre, School of Civil and Environmental Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Shikha Garg
- UNSW Water Research Centre, School of Civil and Environmental Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Jiangzhou Xie
- UNSW Water Research Centre, School of Civil and Environmental Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Changyong Zhang
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei 230026, P. R. China
| | - Yuan Wang
- UNSW Centre for Transformational Environmental Technologies, Yixing, Jiangsu Province 214206, P. R. China
- UNSW Water Research Centre, School of Civil and Environmental Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - T David Waite
- UNSW Centre for Transformational Environmental Technologies, Yixing, Jiangsu Province 214206, P. R. China
- UNSW Water Research Centre, School of Civil and Environmental Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| |
Collapse
|
24
|
Li S, Yang L, Wu J, Yao L, Han D, Liang Y, Yin Y, Hu L, Shi J, Jiang G. Efficient and selective removal of Hg(II) from water using recyclable hierarchical MoS 2/Fe 3O 4 nanocomposites. WATER RESEARCH 2023; 235:119896. [PMID: 36965293 DOI: 10.1016/j.watres.2023.119896] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Revised: 03/07/2023] [Accepted: 03/17/2023] [Indexed: 06/18/2023]
Abstract
Developing practical and cost-effective adsorbents with satisfactory mercury (Hg) remediation capability is indispensable for aquatic environment safety and public health. Herein, a recyclable hierarchical MoS2/Fe3O4 nanocomposite (by in-situ growth of MoS2 nanosheets on the surface of Fe3O4 nanospheres) is presented for the selective removal of Hg(II) from aquatic samples. It exhibited high adsorption capacity (∼1923.5 mg g -1), fast kinetics (k2 ∼ 0.56 mg g -1 min-1), broad working pH range (2-11), excellent selectivity (Kd > 1.0 × 107 mL g -1), and great reusability (removal efficiency > 90% after 20 cycles). In particular, removal efficiencies of up to ∼97% for different Hg(II) concentrations (10-1000 μg L -1) in natural water and industrial effluents confirmed the practicability of MoS2/Fe3O4. The possible mechanism for effective Hg(II) removal was discussed by a series of characterization analyses, which was attributed to the alteration of the MoS2 structure and the surface coordination of Hg-S. The accessibility of surface sulfur sites and the diffusion of Hg(II) in the solid-liquid system were enhanced due to the advantage of the expanded interlayer spacing (0.96 nm) and the hierarchical structure. This study suggests that MoS2/Fe3O4 is a promising material for Hg(II) removal in actual scenarios and provides a feasible approach by rationally constructing hierarchical structures to promote the practical applications of MoS2 in sustainable water treatments.
Collapse
Affiliation(s)
- Shiyu Li
- School of Environment, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310000, China; State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Lin Yang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jialong Wu
- State Environmental Protection Key Laboratory of Source Apportionment and Control of Aquatic Pollution, School of Environmental Studies, China University of Geosciences, Wuhan 430074, China
| | - Linlin Yao
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Deming Han
- School of Environment, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310000, China
| | - Yong Liang
- Hubei Key Laboratory of Environmental and Health Effects of Persistent Toxic Substances, School of Environment and Health, Jianghan University, Wuhan 430056, China
| | - Yongguang Yin
- School of Environment, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310000, China; State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Ligang Hu
- School of Environment, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310000, China; State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Jianbo Shi
- School of Environment, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310000, China; State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China; State Environmental Protection Key Laboratory of Source Apportionment and Control of Aquatic Pollution, School of Environmental Studies, China University of Geosciences, Wuhan 430074, China.
| | - Guibin Jiang
- School of Environment, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310000, China; State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| |
Collapse
|
25
|
Wang J, Wang Y, Xiong W, Li Z, Kong X, Yan H, Lin Y, Duan H, Zhao Y. Super-stable mineralization of multiple heavy metal ions from wastewater for utilization in photocatalytic CO2 reduction and trace precious metal recovery. Chem Eng Sci 2023. [DOI: 10.1016/j.ces.2023.118583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
|
26
|
Chen Y, Mu Y, Tian L, Zheng LL, Mei Y, Xing QJ, Liu W, Zou JP, Yang L, Luo S, Wu D. Targeted Decomplexation of Metal Complexes for Efficient Metal Recovery by Ozone/Percarbonate. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:5034-5045. [PMID: 36916663 DOI: 10.1021/acs.est.3c00190] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Traditional methods cannot efficiently recover Cu from Cu(II)-EDTA wastewater and encounter the formation of secondary contaminants. In this study, an ozone/percarbonate (O3/SPC) process was proposed to efficiently decomplex Cu(II)-EDTA and simultaneously recover Cu. The results demonstrate that the O3/SPC process achieves 100% recovery of Cu with the corresponding kobs value of 0.103 min-1 compared with the typical •OH-based O3/H2O2 process (81.2%, 0.042 min-1). The carbonate radical anion (CO3•-) is generated from the O3/SPC process and carries out the targeted attack of amino groups of Cu(II)-EDTA for decarboxylation and deamination processes, resulting in successive cleavage of Cu-O and Cu-N bonds. In comparison, the •OH-based O3/H2O2 process is predominantly responsible for the breakage of Cu-O bonds via decarboxylation and formic acid removal. Moreover, the released Cu(II) can be transformed into stable copper precipitates by employing an endogenous precipitant (CO32-), accompanied by toxic-free byproducts in the O3/SPC process. More importantly, the O3/SPC process exhibits excellent metal recovery in the treatment of real copper electroplating wastewater and other metal-EDTA complexes. This study provides a promising technology and opens a new avenue for the efficient decomplexation of metal-organic complexes with simultaneous recovery of valuable metal resources.
Collapse
Affiliation(s)
- Ying Chen
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, P. R. China
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, School of Resources & Environment, Nanchang University, Nanchang 330031, P. R. China
| | - Yi Mu
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, P. R. China
| | - Lei Tian
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, P. R. China
| | - Ling-Ling Zheng
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, P. R. China
| | - Yi Mei
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, P. R. China
| | - Qiu-Ju Xing
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, P. R. China
| | - Wen Liu
- The Key Laboratory of Water and Sediment Sciences (Ministry of Education), College of Environmental Sciences and Engineering, Peking University, Beijing 100871, P. R. China
| | - Jian-Ping Zou
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, P. R. China
| | - Lixia Yang
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, P. R. China
| | - Shenglian Luo
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, P. R. China
| | - Daishe Wu
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, School of Resources & Environment, Nanchang University, Nanchang 330031, P. R. China
- School of Materials and Chemical Engineering, Pingxiang University, Pingxiang 337000, P. R. China
| |
Collapse
|
27
|
Long X, Huang R, Li Y, Wang J, Zhang M, Ying Zhang I. Understanding the electro-cocatalytic peroxymonosulfate-based systems with BDD versus DSA anodes: radical versus nonradical dominated degradation mechanisms. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2023.123120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
|
28
|
Overlooked oxidative role of Ni(III) in the enhanced mineralization of Ni(II)–EDTA complex by ozonation. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.122697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|