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Song Y, Xia L, Salla M, Xi S, Fu W, Wang W, Gao M, Huang S, Huang S, Wang X, Yu X, Niu T, Zhang Y, Wang S, Han M, Ni M, Wang Q, Zhang H. A Hybrid Redox-Mediated Zinc-Air Fuel Cell for Scalable and Sustained Power Generation. Angew Chem Int Ed Engl 2024; 63:e202314796. [PMID: 38391058 DOI: 10.1002/anie.202314796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 02/03/2024] [Accepted: 02/22/2024] [Indexed: 02/24/2024]
Abstract
Zinc-air batteries (ZABs) have attracted considerable attention for their high energy density, safety, low noise, and eco-friendliness. However, the capacity of mechanically rechargeable ZABs was limited by the cumbersome procedure for replacing the zinc anode, while electrically rechargeable ZABs suffer from issues including low depth of discharge, zinc dendrite and dead zinc formation, and sluggish oxygen evolution reaction, etc. To address these issues, we report a hybrid redox-mediated zinc-air fuel cell (HRM-ZAFC) utilizing 7,8-dihydroxyphenazine-2-sulfonic acid (DHPS) as the anolyte redox mediator, which shifts the zinc oxidation reaction from the electrode surface to a separate fuel tank. This approach decouples fuel feeding and electricity generation, providing greater operation flexibility and scalability for large-scale power generation applications. The DHPS-mediated ZAFC exhibited a superior peak power density of 0.51 W/cm2 and a continuous discharge capacity of 48.82 Ah with ZnO as the discharge product in the tank, highlighting its potential for power generation.
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Affiliation(s)
- Yuxi Song
- Department of Materials Science and Engineering, College of Design and Engineering, National University of Singapore, 7 Engineering Drive 1, Singapore, 117574, Singapore
| | - Lingchao Xia
- Department of Building and Real Estate, Research Institute for Sustainable Urban Development (RISUD) and Research Institute for Smart Energy (RISE), The Hong Kong Polytechnic University, 11 Yuk Choi Rd, Hung Hom, Kowloon, Hong Kong
| | - Manohar Salla
- Department of Materials Science and Engineering, College of Design and Engineering, National University of Singapore, 7 Engineering Drive 1, Singapore, 117574, Singapore
| | - Shibo Xi
- Institute of Sustainability for Chemicals, Energy and Environment (ISCE2), Agency for Science, Technology and Research (A*STAR), 1 Pesek Road, Jurong Island, 627833, Singapore, Singapore
| | - Weiyin Fu
- Department of Materials Science and Engineering, College of Design and Engineering, National University of Singapore, 7 Engineering Drive 1, Singapore, 117574, Singapore
| | - Wanwan Wang
- Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Singapore, 138634, Singapore
| | - Mengqi Gao
- Department of Materials Science and Engineering, College of Design and Engineering, National University of Singapore, 7 Engineering Drive 1, Singapore, 117574, Singapore
| | - Songpeng Huang
- Department of Materials Science and Engineering, College of Design and Engineering, National University of Singapore, 7 Engineering Drive 1, Singapore, 117574, Singapore
| | - Shiqiang Huang
- Department of Materials Science and Engineering, College of Design and Engineering, National University of Singapore, 7 Engineering Drive 1, Singapore, 117574, Singapore
| | - Xun Wang
- Department of Materials Science and Engineering, College of Design and Engineering, National University of Singapore, 7 Engineering Drive 1, Singapore, 117574, Singapore
| | - Xingzi Yu
- College of Mechanical and Vehicle Engineering, Chongqing University, No.174, Shazheng Street, Shapingba District, 400044, China
| | - Tong Niu
- College of Mechanical and Vehicle Engineering, Chongqing University, No.174, Shazheng Street, Shapingba District, 400044, China
| | - Yuqi Zhang
- College of Mechanical and Vehicle Engineering, Chongqing University, No.174, Shazheng Street, Shapingba District, 400044, China
| | - Shijie Wang
- Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Singapore, 138634, Singapore
| | - Ming Han
- School of Engineering, Temasek Polytechnic, 21 Tampines Ave 1, 529757, Singapore, Singapore
| | - Meng Ni
- Department of Building and Real Estate, Research Institute for Sustainable Urban Development (RISUD) and Research Institute for Smart Energy (RISE), The Hong Kong Polytechnic University, 11 Yuk Choi Rd, Hung Hom, Kowloon, Hong Kong
| | - Qing Wang
- Department of Materials Science and Engineering, College of Design and Engineering, National University of Singapore, 7 Engineering Drive 1, Singapore, 117574, Singapore
| | - Hang Zhang
- Department of Materials Science and Engineering, College of Design and Engineering, National University of Singapore, 7 Engineering Drive 1, Singapore, 117574, Singapore
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Liu IC, Hu X, Fei B, Lee C, Fan S, Xin JH, Noor N. Fluorine-free nanoparticle coatings on cotton fabric: comparing the UV-protective and hydrophobic capabilities of silica vs. silica-ZnO nanostructures. RSC Adv 2024; 14:4301-4314. [PMID: 38304558 PMCID: PMC10828638 DOI: 10.1039/d3ra08835a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2023] [Accepted: 01/22/2024] [Indexed: 02/03/2024] Open
Abstract
Robust, hydrophobic woven cotton fabrics were obtained through the sol-gel dip coating of two different nanoparticle (NP) architectures; silica and silica-ZnO. Water repellency values as high as 148° and relatively low tilt angles for fibrous fabrics (12°) were observed, without the need for fluorinated components. In all cases, this enhanced functionality was achieved with the broad retention of water vapor permeability characteristics, i.e., less than 10% decrease. NP formation routes indicated direct bonding interactions in both the silica and silica-ZnO structures. The physico-chemical effects of NP-compatibilizer (i.e., polydimethoxysilane (PDMS) and n-octyltriethoxysilane (OTES) at different ratios) coatings on cotton fibres indicate that compatibilizer-NP interactions are predominantly physical. Whenever photoactive ZnO-containing additives were used, there was a minor decrease in hydrophobic character, but order of magnitude increases in UV-protective capability (i.e., UPF > 384); properties which were absent in non-ZnO-containing samples. Such water repellency and UPF capabilities were stable to both laundering and UV-exposure, resisting the commonly encountered UV-induced wettability transitions associated with photoactive ZnO. These results suggest that ZnO-containing silica NP coatings on cotton can confer both excellent and persistent surface hydrophobicity as well as UV-protective capability, with potential uses in wearables and functional textiles applications.
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Affiliation(s)
- Irene ChaoYun Liu
- The Hong Kong Polytechnic University, School of Fashion and Textiles, Materials Synthesis and Processing Lab Hung Hom Kowloon Hong Kong SAR
| | - Xin Hu
- The Hong Kong Polytechnic University, School of Fashion and Textiles, Materials Synthesis and Processing Lab Hung Hom Kowloon Hong Kong SAR
| | - Bin Fei
- The Hong Kong Polytechnic University, School of Fashion and Textiles, Materials Synthesis and Processing Lab Hung Hom Kowloon Hong Kong SAR
| | - Chenghao Lee
- The Hong Kong Polytechnic University, School of Fashion and Textiles, Materials Synthesis and Processing Lab Hung Hom Kowloon Hong Kong SAR
| | - Suju Fan
- The Hong Kong Polytechnic University, School of Fashion and Textiles, Materials Synthesis and Processing Lab Hung Hom Kowloon Hong Kong SAR
| | - John H Xin
- The Hong Kong Polytechnic University, School of Fashion and Textiles, Materials Synthesis and Processing Lab Hung Hom Kowloon Hong Kong SAR
| | - Nuruzzaman Noor
- The Hong Kong Polytechnic University, School of Fashion and Textiles, Materials Synthesis and Processing Lab Hung Hom Kowloon Hong Kong SAR
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Jiang Y, Shen Z, Tang CS, Shi B. Synthesis and application of waste-based layered double hydroxide: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 903:166245. [PMID: 37579803 DOI: 10.1016/j.scitotenv.2023.166245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 07/23/2023] [Accepted: 08/10/2023] [Indexed: 08/16/2023]
Abstract
The synthesis of layered double hydroxide (LDH) from industrial wastes is a sustainable approach to aid circular economy and hazardous material disposal. In this review, the researches on the synthesis and application of waste-based LDH from 2010 to 2023 are summarized and discussed. At present, there are mainly four types of waste-based LDH produced from red mud, slag, fly ash and wastewater, with co-precipitation being the most typical synthesis method. Red mud is used as the trivalent metal source supplemented by chemical reagents or other types of waste as divalent metal source to produce red mud-based LDH. Slag can act as the sole metal source providing both divalent and trivalent metal sources for slag-based LDH. Fly ash was used either as the trivalent metal source or both divalent and trivalent metal sources to produce fly ash-based LDH. Wastewater-based LDH was typically synthesized by in-situ co-precipitation method to achieve the self-purification of wastewater. The impurities in waste-based LDH can act as a two-edged weapon. It may either hinder or promote the performance of waste-based LDH. The challenge in the synthesis of waste-based LDH lies in the efficient extraction of available metals. The future research prospects for waste-based LDH are suggested.
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Affiliation(s)
- Yimei Jiang
- School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China
| | - Zhengtao Shen
- School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China.
| | - Chao-Sheng Tang
- School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China
| | - Bin Shi
- School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China
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Wang Q, Lin Q, Li Q, Li K, Wu L, Li S, Liu H. As(III) removal from wastewater and direct stabilization by in-situ formation of Zn-Fe layered double hydroxides. JOURNAL OF HAZARDOUS MATERIALS 2021; 403:123920. [PMID: 33264971 DOI: 10.1016/j.jhazmat.2020.123920] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 09/04/2020] [Accepted: 09/07/2020] [Indexed: 06/12/2023]
Abstract
In order to remove and stabilize As(III) simultaneously from wastewater, a novel and effective method based on the in-situ formation of As(III)-containing Zn-Fe layered double hydroxides (ZnFe-As-LDHs) was developed. The influence of pH, Zn/Fe, Fe/As and adding rate on the formation of ZnFe-As-LDHs were investigated. Under the optimal conditions, the concentration of As(III) decreased from 100 to 0.13 mg/L and As leaching concentration of the ultimate sludge was 1.87 mg/L, which could meet the arsenic leaching criteria (5 mg/L) regulated by US EPA. Compared with the "ex-situ" sludge obtained by As(III) adsorbed on the pre-formed ZnFe-LDHs, the As(III) removal efficiency increased by 21.6 % and the stability of the sludge increased by 94.2 % on the in-situ formation of LDHs, which mainly attributed to 55.06 % oxidation of As(III) and co-precipitation of As with Zn and Fe. Additionally, a possible in-situ formation pathway for ZnFe-As-LDHs was illustrated. At the beginning of the process, non-crystalline ferric arsenate formed and then transformed to amorphous ferrihydrite as precursors, followed by the formation of LDHs. This work demonstrated that co-precipitating As with Zn and Fe in the wastewater to in-situ form LDHs exhibited excellent potential for removal and direct stabilization of As(III).
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Affiliation(s)
- Qingwei Wang
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, 410083, China; Water Pollution Control Technology Key Lab of Hunan Province, Changsha, 410004, China
| | - Qiuhong Lin
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Qingzhu Li
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, 410083, China; Water Pollution Control Technology Key Lab of Hunan Province, Changsha, 410004, China.
| | - Kaizhong Li
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Lanyan Wu
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Shuimei Li
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Hui Liu
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, 410083, China; Water Pollution Control Technology Key Lab of Hunan Province, Changsha, 410004, China
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5
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Otis G, Ejgenberg M, Mastai Y. Solvent-Free Mechanochemical Synthesis of ZnO Nanoparticles by High-Energy Ball Milling of ε-Zn(OH) 2 Crystals. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:238. [PMID: 33477493 PMCID: PMC7831064 DOI: 10.3390/nano11010238] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 01/08/2021] [Accepted: 01/13/2021] [Indexed: 11/18/2022]
Abstract
A detailed investigation is presented for the solvent-free mechanochemical synthesis of zinc oxide nanoparticles from ε-Zn(OH)2 crystals by high-energy ball milling. Only a few works have ever explored the dry synthetic route from ε-Zn(OH)2 to ZnO. The milling process of ε-Zn(OH)2 was done in ambient conditions with a 1:100 powder/ball mass ratio, and it produced uniform ZnO nanoparticles with sizes of 10-30 nm, based on the milling duration. The process was carefully monitored and the effect of the milling duration on the powder composition, nanoparticle size and strain, optical properties, aggregate size, and material activity was examined using XRD, TEM, DLS, UV-Vis, and FTIR. The mechanism for the transformation of ε-Zn(OH)2 to ZnO was studied by TGA and XPS analysis. The study gave proof for a reaction mechanism starting with a phase transition of crystalline ε-Zn(OH)2 to amorphous Zn(OH)2, followed by decomposition to ZnO and water. To the best of our knowledge, this mechanochemical approach for synthesizing ZnO from ε-Zn(OH)2 is completely novel. ε-Zn(OH)2 crystals are very easy to obtain, and the milling process is done in ambient conditions; therefore, this work provides a simple, cheap, and solvent-free way to produce ZnO nanoparticles in dry conditions. We believe that this study could help to shed some light on the solvent-free transition from ε-Zn(OH)2 to ZnO and that it could offer a new synthetic route for synthesizing ZnO nanoparticles.
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Affiliation(s)
| | | | - Yitzhak Mastai
- Department of Chemistry and the Institute of Nanotechnology, Bar-Ilan University, Ramat-Gan 52900, Israel; (G.O.); (M.E.)
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Preparation of flaky dihydrate zinc oxalate particles by controlled chelating double-jet precipitation. ADV POWDER TECHNOL 2019. [DOI: 10.1016/j.apt.2019.06.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Wu L, Peng B, Li Q, Wang Q, Yan X, Lin Q, Ji C. Formation of high crystalline LDH sludge for removing Cu and Zn from wastewater by controlled double-jet precipitation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:19665-19675. [PMID: 31079305 DOI: 10.1007/s11356-019-05161-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Accepted: 04/10/2019] [Indexed: 06/09/2023]
Abstract
In order to improve the heavy metal wastewater treatment by avoiding formation of amorphous sludge phase, we develop a faster formation of high crystalline layered double hydroxide (LDH) sludge to remove Cu and Zn from wastewater by controlled double-jet precipitation (CDJP) without hydrothermal or heat aging post-treatment. A series of experimental procedures are conducted to determine the optimal parameters. Results show that the optimal adding rate, pH value, and stirring rate is 0.5 mL min-1, 9.0, and 500 rpm, respectively. The CuZnAl-LDH phase sludge is formed in a well-crystallized hexagonal platelet, which assembled into a flower-like architecture. Comparative studies show that the formation of amorphous LDH sludge in conventional precipitation (CP) could be divided roughly into two stages-from the mixed copper hydroxide, zinc hydroxide, and scarbroite to the mixed low crystallinity CuAl-LDH and ZnAl-LDH. However, in CDJP method, the high crystalline LDH sludge evolved from a new four-step evolution process that is the formation of an amorphous (quasi-)multinary metastable ternary CuZnAl-LDH phase, followed by the indiffusion of cations and substitution of anions to fabricate crystalline LDH, the integrated LDH hexagonal platelets assembled into a flower-like architecture by the screw dislocation growth mechanism, the coarsening growth of each ternary LDH platelet, respectively. Thereinto, the formation of (quasi-)multinary metastable LDH phase instead of metal hydroxide in initial stage would be an obvious advantage of the CDJP method compared to CP method due to the former skipping the sequential precipitation.
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Affiliation(s)
- Lanyan Wu
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
- Institute of Material and Chemical Engineering, Tongren University, Tongren, 554300, China
| | - Bing Peng
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
- Chinese National Engineering Research Center for Control and Treatment of Heavy Metal Pollution, Changsha, 410083, China
- Water Pollution Control Technology Key Lab of Hunan Province, Changsha, 410004, China
| | - Qingzhu Li
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China.
- Chinese National Engineering Research Center for Control and Treatment of Heavy Metal Pollution, Changsha, 410083, China.
- Water Pollution Control Technology Key Lab of Hunan Province, Changsha, 410004, China.
| | - Qingwei Wang
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
- Chinese National Engineering Research Center for Control and Treatment of Heavy Metal Pollution, Changsha, 410083, China
- Water Pollution Control Technology Key Lab of Hunan Province, Changsha, 410004, China
| | - Xu Yan
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
- Chinese National Engineering Research Center for Control and Treatment of Heavy Metal Pollution, Changsha, 410083, China
| | - Qiuhong Lin
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Chunlei Ji
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
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Chen X, Liu X, Huang K. Large-scale synthesis of size-controllable Ag nanoparticles by reducing silver halide colloids with different sizes. CHINESE CHEM LETT 2019. [DOI: 10.1016/j.cclet.2018.11.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Chai L, Li Q, Wang Q, Yan X. Solid-liquid separation: an emerging issue in heavy metal wastewater treatment. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:17250-17267. [PMID: 29766423 DOI: 10.1007/s11356-018-2135-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2018] [Accepted: 04/25/2018] [Indexed: 06/08/2023]
Abstract
Solid-liquid separation (SLS) plays a dominant role in various chemical industries. Nowadays, low efficiency of SLS also become a significant problem in heavy metal (HM) wastewater treatment, affecting the effluent quality (HM concentration and turbidity) and overall process economy. In this context, we summarize here the occurrence of solids in HM wastewater, as well as typical SLS operations used in HM wastewater treatment, including sedimentation, flotation, and centrifugation. More important, this article reviews the improvement of the SLS operations by some technologies, including coagulation, flocculation, ballasted method, seeding method, granular sludge strategy, and external field enhancement. It is noted that abiological granular sludge strategy and magnetic field enhancement often possess higher SLS efficiency (faster settling velocity or shorter separation time) than other methods. Hence, the two strategies stand out as promising tools for improving SLS in HM wastewater treatment, but further research is required regarding scalability, economy, and reliability.
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Affiliation(s)
- Liyuan Chai
- School of Metallurgy and Environment, Central South University, Changsha, 410083, Hunan, China
- National Engineering Research Center for Heavy Metals Pollution Control and Treatment, Changsha, China
| | - Qingzhu Li
- School of Metallurgy and Environment, Central South University, Changsha, 410083, Hunan, China
- National Engineering Research Center for Heavy Metals Pollution Control and Treatment, Changsha, China
| | - Qingwei Wang
- School of Metallurgy and Environment, Central South University, Changsha, 410083, Hunan, China
- National Engineering Research Center for Heavy Metals Pollution Control and Treatment, Changsha, China
| | - Xu Yan
- School of Metallurgy and Environment, Central South University, Changsha, 410083, Hunan, China.
- National Engineering Research Center for Heavy Metals Pollution Control and Treatment, Changsha, China.
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Carbone M. Zn defective ZnCo2O4 nanorods as high capacity anode for lithium ion batteries. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2018.02.035] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Ye L, Chai L, Li Q, Yan X, Wang Q, Liu H. Chemical precipitation granular sludge (CPGS) formation for copper removal from wastewater. RSC Adv 2016. [DOI: 10.1039/c6ra11165c] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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