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Wu M, Chen Y, Guo Z, Wang X, Zhang H, Zhang T, Guan S, Bian Z. Solar-assisted selective separation and recovery of precious group metals from deactivated air purification catalysts. Sci Bull (Beijing) 2024:S2095-9273(24)00307-4. [PMID: 38729803 DOI: 10.1016/j.scib.2024.04.058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 03/18/2024] [Accepted: 04/22/2024] [Indexed: 05/12/2024]
Abstract
The mitigation of environmental and energy crises could be advanced by reclaiming platinum group precious metals (PGMs) from decommissioned air purification catalysts. However, the complexity of catalyst composition and the high chemical inertness of PGMs significantly impede this process. Consequently, recovering PGMs from used industrial catalysts is crucial and challenging. This study delves into an environmentally friendly approach to selectively recover PGMs from commercial air purifiers using photocatalytic redox technology. Our investigation focuses on devising a comprehensive strategy for treating three-way catalysts employed in automotive exhaust treatment. By meticulously pretreating and modifying reaction conditions, we achieved noteworthy results, completely dissolving and separating rhodium (Rh), palladium (Pd), and platinum (Pt) within a 12-h time frame. Importantly, the solubility selectivity persists despite the remarkably similar physicochemical properties of Rh, Pd, and Pt. To bolster the environmental sustainability of our method, we harness sunlight as the energy source to activate the photocatalysts, facilitating the complete dissolution of precious metals under natural light irradiation. This eco-friendly recovery approach demonstrated on commercial air purifiers, exhibits promise for broader application to a diverse range of deactivated air purification catalysts, potentially enabling implementation on a large scale.
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Affiliation(s)
- Meijun Wu
- Ministry of Education Key Laboratory of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials, Shanghai Normal University, Shanghai 200234, China
| | - Yao Chen
- Ministry of Education Key Laboratory of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials, Shanghai Normal University, Shanghai 200234, China; Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200438, China
| | - Zhenpeng Guo
- Ministry of Education Key Laboratory of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials, Shanghai Normal University, Shanghai 200234, China
| | - Xinru Wang
- Ministry of Education Key Laboratory of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials, Shanghai Normal University, Shanghai 200234, China
| | | | - Ting Zhang
- Ministry of Education Key Laboratory of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials, Shanghai Normal University, Shanghai 200234, China
| | - Shuhui Guan
- Ministry of Education Key Laboratory of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials, Shanghai Normal University, Shanghai 200234, China
| | - Zhenfeng Bian
- Ministry of Education Key Laboratory of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials, Shanghai Normal University, Shanghai 200234, China.
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2
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Zandi-Darehgharibi F, Haddadi H, Asfaram A. A new tannin-based adsorbent synthesized for rapid and selective recovery of palladium and gold: Optimization using central composite design. Heliyon 2024; 10:e24639. [PMID: 38314278 PMCID: PMC10837505 DOI: 10.1016/j.heliyon.2024.e24639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Revised: 12/08/2023] [Accepted: 01/11/2024] [Indexed: 02/06/2024] Open
Abstract
A tannin-based adsorbent was synthesized by pomegranate peel tannin powder modified with ethylenediamine (PT-ED) for the rapid and selective recovery of palladium and gold. To characterize PT-ED, field emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy (EDS-Mapping), and Fourier transform infrared spectroscopy (FT-IR) were used. Central composite design (CCD) was used for optimization. The kinetic, isotherm, interference of coexisting metal ions, and thermodynamics were studied. The optimal conditions, including Au (III) concentration = 30 m g L - 1 , Pd (II) concentration = 30 m g L - 1 , adsorbent mass = 26 mg, pH = 2, and time = 26 min with the sorption percent more than 99 %, were anticipated for both metals using CCD. Freundlich model and pseudo-second-order expressed the isotherm and kinetic adsorption of the both metals. The inhomogeneity of the adsorbent surface and the multi-layer adsorption of gold and palladium ions on the PT-ED surface are depicted by the Freundlich model. The thermodynamic investigation showed that P d 2 + and A u 3 + ions adsorption via PT-ED was an endothermic, spontaneous, and feasible process. The maximum adsorption capacity of P d 2 + and A u 3 + ions on PT-ED was 261.189 m g g - 1 and 220.277 m g g - 1 , respectively. The probable adsorption mechanism of P d 2 + and A u 3 + ions can be ion exchange and chelation. PT-ED (26 mg) recovered gold and palladium rapidly from the co-existing metals in the printed circuit board (PCB) scrap, including Ca, Zn, Si, Cr, Pb, Ni, Cu, Ba, W, Co, Mn, and Mg with supreme selectivity toward gold and palladium. The results of this work suggest the use of PT-ED with high selectivity and efficiency to recover palladium and gold from secondary sources such as PCB scrap.
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Affiliation(s)
| | - Hedayat Haddadi
- Department of Chemistry, Faculty of Basic Sciences, Shahrekord University, Shahrekord, Iran
| | - Arash Asfaram
- Medicinal Plants Research Center, Yasuj University of Medical Sciences, Yasuj, Iran
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Wang M, Liu K, Xu Z, Dutta S, Valix M, Alessi DS, Huang L, Zimmerman JB, Tsang DCW. Selective Extraction of Critical Metals from Spent Lithium-Ion Batteries. Environ Sci Technol 2023; 57:3940-3950. [PMID: 36800282 DOI: 10.1021/acs.est.2c07689] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Selective and highly efficient extraction technologies for the recovery of critical metals including lithium, nickel, cobalt, and manganese from spent lithium-ion battery (LIB) cathode materials are essential in driving circularity. The tailored deep eutectic solvent (DES) choline chloride-formic acid (ChCl-FA) demonstrated a high selectivity and efficiency in extracting critical metals from mixed cathode materials (LiFePO4:Li(NiCoMn)1/3O2 mass ratio of 1:1) under mild conditions (80 °C, 120 min) with a solid-liquid mass ratio of 1:200. The leaching performance of critical metals could be further enhanced by mechanochemical processing because of particle size reduction, grain refinement, and internal energy storage. Furthermore, mechanochemical reactions effectively inhibited undesirable leaching of nontarget elements (iron and phosphorus), thus promoting the selectivity and leaching efficiency of critical metals. This was achieved through the preoxidation of Fe and the enhanced stability of iron phosphate framework, which significantly increased the separation factor of critical metals to nontarget elements from 56.9 to 1475. The proposed combination of ChCl-FA extraction and the mechanochemical reaction can achieve a highly selective extraction of critical metals from multisource spent LIBs under mild conditions.
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Affiliation(s)
- Mengmeng Wang
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China
- Research Centre for Environmental Technology and Management, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China
| | - Kang Liu
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China
- Research Centre for Environmental Technology and Management, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China
| | - Zibo Xu
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China
- Research Centre for Environmental Technology and Management, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China
| | - Shanta Dutta
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China
- Research Centre for Environmental Technology and Management, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China
| | - Marjorie Valix
- School of Chemical and Biomolecular Engineering, University of Sydney, Sydney, New South Wales 2006, Australia
| | - Daniel S Alessi
- Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Alberta T6G 2E3, Canada
| | - Longbin Huang
- Ecological Engineering of Mine Wastes, Sustainable Minerals Institute, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Julie B Zimmerman
- Department of Forestry and Environmental Studies, Yale University, 195 Prospect Street, New Haven, Connecticut 06520, United States
| | - Daniel C W Tsang
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China
- Ecological Engineering of Mine Wastes, Sustainable Minerals Institute, The University of Queensland, Brisbane, Queensland 4072, Australia
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Xia Q, Song Q, Xu Z. Electrorefining and electrodeposition for metal separation and purification from polymetallic concentrates after waste printed circuit board smelting. Waste Manag 2023; 158:146-152. [PMID: 36709680 DOI: 10.1016/j.wasman.2023.01.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 01/01/2023] [Accepted: 01/13/2023] [Indexed: 06/18/2023]
Abstract
Multi metal recycling from waste printed circuit boards (WPCBs) is attractive for resource conservation and sustainability. While smelting is commonly adopted to produce polymetallic concentrates from WPCBs, current processes cost oxidation smelting and fire refining followed by electrorefining to deport co-existing base metals and recover copper, which can cause substantial metal losses, long steps, and lack of effective methods for subsequent base metal recycling. Here, direct electrorefining of polymetallic concentrates (Cu-Ni-Fe-Pb-sn-Au-Ag) combined with electrodeposition was investigated to realize multi metal separation and purification. It was found that direct electrorefining of concentrates in H2SO4/CuSO4 electrolyte at 0.4 V realized >98% base metal dissolution and copper production (∼99% purity), serving as a combined metal leaching and copper electrowinning procedure. PbSO4-SnO2-Cu5FeS4 precipitate was formed in anode slime, with Ag-Au enriched by 8.5-61 times. Analysis on subsequent selective metal electrodeposition revealed the blocking effect of Zn2+ and overlapped potential region of Fe2+-Ni2+, emphasizing the importance of Zn and Fe pre-separation during smelting and chemical precipitation. Electrodeposition experiments demonstrated high selectivity for Cu and Ni at 0.05 and -0.7 V, where Ni2+ shows complex electroreduction behaviors. The proposed process can serve as an alternative feasible route for multi metal recycling from WPCBs.
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Affiliation(s)
- Qinyi Xia
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, People's Republic of China
| | - Qingming Song
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, People's Republic of China
| | - Zhenming Xu
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, People's Republic of China.
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Xie C, Xiao Y, He C, Liu WS, Tang YT, Wang S, van der Ent A, Morel JL, Simonnot MO, Qiu RL. Selective recovery of rare earth elements and value-added chemicals from the Dicranopteris linearis bio-ore produced by agromining using green fractionation. J Hazard Mater 2023; 443:130253. [PMID: 36327843 DOI: 10.1016/j.jhazmat.2022.130253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 09/24/2022] [Accepted: 10/22/2022] [Indexed: 06/16/2023]
Abstract
The increasing demand for Rare Earth Elements (REEs) and the depletion of mineral resources motivate sustainable strategies for REE recovery from alternative unconventional sources, such as REE hyperaccumulator. The greatest impediment to REE agromining is the difficulty in the separation of REEs and other elements from the harvested biomass (bio-ore). Here, we develop a sulfuric acid assisted ethanol fractionation method for processing D. linearis bio-ore to produce the pure REE compounds and value-added chemicals. The results show that 94.5% of REEs and 87.4% of Ca remained in the solid phase, and most of the impurities (Al, Fe, Mg, and Mn) transferred to the liquid phase. Density functional theory calculations show that the water-cation bonds of REEs and Ca cations were broken more easily than the bonds of the cations of key impurities, causing lower solubility of REEs and Ca compounds. Subsequent separation and purification led to a REE-oxide (REO) product with a purity of 97.1% and a final recovery of 88.9%. In addition, lignin and phenols were obtained during organosolv fractionation coupled with a fast pyrolysis process. This new approach opens up the possibility for simultaneous selective recovery of REEs and to produce value-added chemicals from REE bio-ore refining.
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Affiliation(s)
- Candie Xie
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangdong Provincial Engineering Research Center for Heavy Metal Contaminated Soil Remediation, School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China
| | - Ye Xiao
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangdong Provincial Engineering Research Center for Heavy Metal Contaminated Soil Remediation, School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China
| | - Chao He
- Faculty of Engineering and Natural Sciences, Tampere University, Tampere, Finland
| | - Wen-Shen Liu
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangdong Provincial Engineering Research Center for Heavy Metal Contaminated Soil Remediation, School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China.
| | - Ye-Tao Tang
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangdong Provincial Engineering Research Center for Heavy Metal Contaminated Soil Remediation, School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China
| | - Shizhong Wang
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangdong Provincial Engineering Research Center for Heavy Metal Contaminated Soil Remediation, School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China.
| | - Antony van der Ent
- Centre for Mined Land Rehabilitation, Sustainable Minerals Institute, The University of Queensland, St Lucia, Queensland 4072, Australia
| | | | | | - Rong-Liang Qiu
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangdong Provincial Engineering Research Center for Heavy Metal Contaminated Soil Remediation, School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China
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Zhou X, Yang W, Liu X, Tang J, Su F, Li Z, Yang J, Ma Y. One-step selective separation and efficient recovery of valuable metals from mixed spent lithium batteries in the phosphoric acid system. Waste Manag 2023; 155:53-64. [PMID: 36343600 DOI: 10.1016/j.wasman.2022.10.034] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 10/21/2022] [Accepted: 10/26/2022] [Indexed: 06/16/2023]
Abstract
The recovery of valuable elements in spent lithium-ion batteries (LIBs) has attracted more and more attention. Efficient recovery of valuable elements from spent LIBs with lower consumption and shorter process is the target that people have been pursuing. In this study, the valuable metals (Ni, Co, Mn and Li) and FePO4 products are simultaneously recovered from mixed spent LiNixCoyMnzO2 and LiFePO4 in one step under the optimized condition of 0.88 M H3PO4, a mass ratio of LFP/NCM of 2:1, a L/S ratio of 33:1 and 80 ℃ for 120 min without additional auxiliary reagents. Over 60 % of acid consumption is reduced and the process of adjusting pH is avoidable. The leaching efficiencies of the valuable elements reach up to 99.1 % for Ni, 98.9 % for Co, 99.6 % for Li and 97.3 % for Mn. Almost all of Fe is precipitated as FePO4·2H2O. By means of the empirical model, the research on leaching kinetics demonstrates that the leaching reaction is internal diffusion-controlled with the apparent activation energy of valuable metals less than 30 kJ/mol. Furthermore, the redox reaction mechanism between spent LiBs has been explored. And the intrinsic driving force in the phosphoric acid system is found out. This finding may provide an innovative and selective recycling method for valuable elements from mixed spent LIBs with high economic benefit and fewer environmental footprints.
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Affiliation(s)
- Xiangyang Zhou
- School of Metallurgy and Environment, Engineering Research Center of the Ministry of Education for Advanced Battery Materials, Central South University, Changsha 410083, China; Hunan Provincial Key Laboratory of Nonferrous Value-added Metallurgy, Changsha 410083, China
| | - Wan Yang
- School of Metallurgy and Environment, Engineering Research Center of the Ministry of Education for Advanced Battery Materials, Central South University, Changsha 410083, China
| | - Xiaojian Liu
- School of Metallurgy and Environment, Engineering Research Center of the Ministry of Education for Advanced Battery Materials, Central South University, Changsha 410083, China
| | - Jingjing Tang
- School of Metallurgy and Environment, Engineering Research Center of the Ministry of Education for Advanced Battery Materials, Central South University, Changsha 410083, China
| | - Fanyun Su
- School of Metallurgy and Environment, Engineering Research Center of the Ministry of Education for Advanced Battery Materials, Central South University, Changsha 410083, China
| | - Zhenxiao Li
- School of Metallurgy and Environment, Engineering Research Center of the Ministry of Education for Advanced Battery Materials, Central South University, Changsha 410083, China
| | - Juan Yang
- School of Metallurgy and Environment, Engineering Research Center of the Ministry of Education for Advanced Battery Materials, Central South University, Changsha 410083, China; Hunan Provincial Key Laboratory of Nonferrous Value-added Metallurgy, Changsha 410083, China
| | - Yayun Ma
- Powder Metallurgy Research Institute, Central South University, Changsha 410083, China.
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Liu C, Ji H, Liu J, Liu P, Zeng G, Luo X, Guan Q, Mi X, Li Y, Zhang J, Tong Y, Wang Z, Wu S. An emission-free controlled potassium pyrosulfate roasting-assisted leaching process for selective lithium recycling from spent Li-ion batteries. Waste Manag 2022; 153:52-60. [PMID: 36049272 DOI: 10.1016/j.wasman.2022.08.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 07/29/2022] [Accepted: 08/23/2022] [Indexed: 06/15/2023]
Abstract
Recycling critical metals from spent Li-ion batteries (LIBs) is important for the overall sustainability of future batteries. This study reports an improved sulfation roasting technology to efficiently recycle Li and Co from spent LiCoO2 LIBs using potassium pyrosulfate as sulfurizing reagent. By sulfation roasting, LiCoO2 was converted into water-soluble lithium potassium sulfate and water-insoluble cobalt oxide. Under optimal conditions, 98.51% Li was leached in water, with a selectivity of 99.86%. More importantly, sulfur can be recirculated thoroughly, and the sulfur atomic efficiency can be significantly enhanced by controlling the amount of potassium pyrosulfate. Li ions from the water leaching process were recovered by chemical precipitation. Furthermore, application of this technology to other spent LIBs, such as LiMn2O4 and LiNi0.5Co0.2Mn0.3O2, verified its effectiveness for selective recovery Li. These findings can provide some inspiration for high efficiency and environmentally friendly recovery metal from spent LIBs.
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Affiliation(s)
- Chunli Liu
- National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, School of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, PR China
| | - Haiyan Ji
- National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, School of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, PR China
| | - Jiayin Liu
- School of Civil Engineering and Architecture, Nanchang Hangkong University, Nanchang 330063, PR China
| | - Pengfei Liu
- National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, School of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, PR China
| | - Guisheng Zeng
- National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, School of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, PR China.
| | - Xubiao Luo
- National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, School of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, PR China
| | - Qian Guan
- National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, School of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, PR China
| | - Xue Mi
- National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, School of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, PR China
| | - Yingpeng Li
- National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, School of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, PR China
| | - Jiefei Zhang
- National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, School of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, PR China
| | - Yongfen Tong
- National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, School of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, PR China
| | - Zhongbing Wang
- National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, School of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, PR China
| | - Shaolin Wu
- National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, School of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, PR China
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He H, Feng J, Gao X, Fei X. Selective separation and recovery of lithium, nickel, MnO 2, and Co 2O 3 from LiNi 0.5Mn 0.3Co 0.2O 2 in spent battery. Chemosphere 2022; 286:131897. [PMID: 34399252 DOI: 10.1016/j.chemosphere.2021.131897] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 08/11/2021] [Accepted: 08/12/2021] [Indexed: 06/13/2023]
Abstract
The recovery of valuable metals from the LiNi0·5Mn0·3Co0·2O2 in spent batteries deserves more attention. We report a series of feasible procedures to selectively recover the four metals (Li, Ni, Mn, and Co) using a combination of hydrometallurgical and pyrometallurgyical processes. Firstly, oxalic acid is used to dissolve Li and precipitate the other three metals in oxalate forms. It is found that under the optimal condition, about 98% of the Li is dissolved, and on average 93% of the other three metals are transformed to precipitated oxalates. The oxalates are then transformed to NiO·Mn2O3·Co3O4 by being calcinated at 723 K under atmospheric environment. The selective recovery of NiO·Mn2O3·Co3O4 can be achieved by using H2SO4 under three different conditions. The first step is to use H2SO4 to selectively dissolve CoO from the Co3O4. Then the combination of H2SO4 and ultrasound is adopted to dissolve NiO, during which the ultrasound destroys the surficial oxide film on the NiO. Afterwards, the Mn2O3 is transformed to MnO2 and Mn2+ in heated H2SO4. The Co, Ni and Mn ions are dissolved in a sequence, which facilitates their separation and recovery. As the main components of the final residual solids, Co2O3 and MnO2 present in distinctly different sizes and shapes, which are beneficial for their separation and direct usage.
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Affiliation(s)
- Hongping He
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, 518060, PR China; School of Civil and Environmental Engineering, Nanyang Technological University, 639798, Singapore
| | - Junli Feng
- Shenzhen Customs Industrial Products Inspection Technology Center, Shenzhen, 518067, PR China
| | - Xiaofeng Gao
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, 400045, China
| | - Xunchang Fei
- School of Civil and Environmental Engineering, Nanyang Technological University, 639798, Singapore; Residues and Resource Reclamation Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, Clean Tech One, 637141, Singapore.
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Das RS, Kumar A, Wankhade AV, Mandavgane SA. Antioxidant analysis of ultra-fast selectively recovered 4-hydroxy benzoic acid from fruits and vegetable peel waste using graphene oxide based molecularly imprinted composite. Food Chem 2021; 376:131926. [PMID: 34968918 DOI: 10.1016/j.foodchem.2021.131926] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 12/08/2021] [Accepted: 12/19/2021] [Indexed: 11/30/2022]
Abstract
Food processing industries generate 25-30% of fruit and vegetable peel (F&VP) waste of the total produce, which are rich in polyphenolic antioxidants (PA). Sustainable solution for the above waste can be its valorization for the recovery of PA, often used as natural preservative. Present work reports rationally designed graphene oxide-based molecularly imprinted composites (GOMIPs) using ionic liquid 1-allyl-3-octylimidazolium chloride (A) as a green functional monomer for selective recovery of PA 4-Hydroxy benzoic acid (4HA) from F&VP/pomegranate peel (PGP) waste. GOMIP-A and GOMIP-V were characterized using various techniques for its successful synthesis. GOMIP-A attained equilibrium within 10 min with adsorption capacity of 190.56 μmol g-1 for 4HA. Developed HPLC method depicted selective recovery of 77.23% and 62.83% 4HA from F&VP and PGP waste respectively by GOMIP-A. Subsequently, desorbed 4HA from GOMIP-A matrices exhibited the antioxidant potential of 33.53% (F&VP extract) and 47.97% (PGP extract) for DPPH radical.
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Affiliation(s)
- Ranjita S Das
- Department of Chemistry, Visvesvaraya National Institute of Technology (VNIT), Nagpur 440010, India
| | - Anupama Kumar
- Department of Chemistry, Visvesvaraya National Institute of Technology (VNIT), Nagpur 440010, India.
| | - Atul V Wankhade
- Department of Chemistry, Visvesvaraya National Institute of Technology (VNIT), Nagpur 440010, India
| | - Sachin A Mandavgane
- Department of Chemical Engineering, Visvesvaraya National Institute of Technology (VNIT), Nagpur 440010, India
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Biswas FB, Rahman IMM, Nakakubo K, Yunoshita K, Endo M, Mashio AS, Taniguchi T, Nishimura T, Maeda K, Hasegawa H. Comparative evaluation of dithiocarbamate-modified cellulose and commercial resins for recovery of precious metals from aqueous matrices. J Hazard Mater 2021; 418:126308. [PMID: 34329039 DOI: 10.1016/j.jhazmat.2021.126308] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 05/28/2021] [Accepted: 06/01/2021] [Indexed: 06/13/2023]
Abstract
Economic and ecological issues motivate the recovery of precious metals (PMs: Ag, Au, Pd, and Pt) from secondary sources. From the viewpoint of eco-friendliness and cost-effectiveness, biomass-based resins are superior to synthetic polymer-based resins for PM recovery. Herein, a detailed comparative study of bio-sorbent dithiocarbamate-modified cellulose (DMC) and synthetic polymer-based commercial resins (Q-10R, Lewatit MonoPlus TP 214, Diaion WA30, and Dowex 1X8) for PM recovery from waste resources was conducted. The performances and applicability of the selected resins were investigated in terms of sorption selectivity, effect of competing anions, sorption isotherms, impact of temperature, and PM extractability from industrial wastes. Although the sorption selectivity toward PMs in acidic solutions by DMC and other resins was comparable, the sorption efficiency of commercial resins was adversely affected by competing anions. The sorption of PMs fitted the Langmuir model for all the studied resins, except Q-10R, which followed the Freundlich model. The maximum sorption capacity of DMC was 2.2-42 times higher than those of the resins. Furthermore, the PM extraction performance of DMC from industrial wastes exceeded that of the commercial resins, with a sorption efficiency ≥99% and a DMC dosage of 5-40 times lower.
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Affiliation(s)
- Foni B Biswas
- Graduate School of Natural Science and Technology, Kanazawa University, Kakuma, Kanazawa 920-1192, Japan; Department of Chemistry, Faculty of Science, University of Chittagong, Chittagong 4331, Bangladesh.
| | - Ismail M M Rahman
- Institute of Environmental Radioactivity, Fukushima University, 1 Kanayagawa, Fukushima City, Fukushima 960-1296, Japan.
| | - Keisuke Nakakubo
- Graduate School of Natural Science and Technology, Kanazawa University, Kakuma, Kanazawa 920-1192, Japan
| | - Koki Yunoshita
- Graduate School of Natural Science and Technology, Kanazawa University, Kakuma, Kanazawa 920-1192, Japan
| | - Masaru Endo
- Graduate School of Natural Science and Technology, Kanazawa University, Kakuma, Kanazawa 920-1192, Japan; Daicel Corporation, 1239 Shinzaike, Aboshi-ku, Himeji-Shi, Hyogo 671-1283, Japan
| | - Asami S Mashio
- Institute of Science and Engineering, Kanazawa University, Kakuma, Kanazawa 920-1192, Japan
| | - Tsuyoshi Taniguchi
- Institute of Science and Engineering, Kanazawa University, Kakuma, Kanazawa 920-1192, Japan
| | - Tatsuya Nishimura
- Institute of Science and Engineering, Kanazawa University, Kakuma, Kanazawa 920-1192, Japan
| | - Katsuhiro Maeda
- Institute of Science and Engineering, Kanazawa University, Kakuma, Kanazawa 920-1192, Japan.
| | - Hiroshi Hasegawa
- Institute of Science and Engineering, Kanazawa University, Kakuma, Kanazawa 920-1192, Japan.
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11
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Xu L, Ding R, Mao Y, Peng S, Li Z, Zong Y, Wu D. Selective recovery of phosphorus and urea from fresh human urine using a liquid membrane chamber integrated flow-electrode electrochemical system. Water Res 2021; 202:117423. [PMID: 34284122 DOI: 10.1016/j.watres.2021.117423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2021] [Revised: 07/02/2021] [Accepted: 07/06/2021] [Indexed: 06/13/2023]
Abstract
Phosphorus (P) extraction from human urine is a potential strategy to address global resource shortage, but few approaches are able to obtain high-quality liquid P products. In this study, we introduced an innovative flow-electrode capacitive deionization (FCDI) system, also called ion-capture electrochemical system (ICES), for selectively extracting P and N (i.e., urea) from fresh human urine simply by integrating a liquid membrane chamber (LMC) using a pair of anion exchange membrane (AEM). In the charging process, negatively charged P ions (i.e., HPO42- and H2PO4-) can be captured by acidic extraction solutions (e.g., solutions of HCl, HNO3 and H2SO4) on their way to the anode chamber, leading to the conversion of P ions to uncharged H3PO4, while other undesired ions such as Cl- and SO42- are expelled. Simultaneously, uncharged urea molecules remain in the urine effluent with the removal of salt. Thus, high-purity phosphoric acid and urea solutions can be obtained in the LMC and spacer chambers, respectively. The purification of P in an acidic environment is ascribed largely to the competitive migration and protonation of ions. The latter contributes ~27% for the selective capture of P. Under the optimal operating conditions (i.e., ratio of the urine volume to the HCl volume = 7:3, initial pH of the extraction solution = 1.43, current density = 20 A/m2 and threshold pH ~ 2.0), satisfactory recovery performance (811 mg/L P with 73.85% purity and 8.3 g/L urea-N with 81.4% extraction efficiency) and desalination efficiency (91.1%) were obtained after 37.5 h of continuous operation. Our results reveal a promising strategy for improving in selective separation and continuous operation via adjustments to the cell configuration, initiating a new research dimension toward selective ion separation and high-quality P recovery.
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Affiliation(s)
- Longqian Xu
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science & Engineering, Tongji University, Shanghai 200092, PR China.
| | - Ren Ding
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science & Engineering, Tongji University, Shanghai 200092, PR China.
| | - Yunfeng Mao
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science & Engineering, Tongji University, Shanghai 200092, PR China.
| | - Shuai Peng
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science & Engineering, Tongji University, Shanghai 200092, PR China
| | - Zheng Li
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science & Engineering, Tongji University, Shanghai 200092, PR China.
| | - Yang Zong
- 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.
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12
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Qiu X, Hu J, Tian Y, Deng W, Yang Y, Silvester DS, Zou G, Hou H, Sun W, Hu Y, Ji X. Highly efficient re-cycle/generation of LiCoO 2 cathode assisted by 2-naphthalenesulfonic acid. J Hazard Mater 2021; 416:126114. [PMID: 34492910 DOI: 10.1016/j.jhazmat.2021.126114] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Revised: 04/30/2021] [Accepted: 05/02/2021] [Indexed: 06/13/2023]
Abstract
The explosively growing demand for electrical energy is generating a great deal of spent lithium-ion batteries (LIBs). Therefore, a simple and effective strategy for the sustainable recycling of used batteries is urgently needed to minimize chemical consumption and to reduce the associated environmental pollution. In this work, 2-naphthalenesulfonic acid is innovatively proposed for the highly-selective recovery of valuable metals. Impressively, lithium and cobalt are simultaneously separated through a single-step process, in which 99.3% of lithium is leached out as Li+ enriched solutions while 99% of cobalt is precipitated as cobalt-naphthalenesulfonate. The obtained lithium enriched solutions are recovered as Li2CO3. The cobalt-naphthalenesulfonate with high purity (99%) is ready to be transformed into Co3O4, and then generated into LiCoO2 by reacting with the above-obtained Li2CO3. The cathode material LiCoO2 with micro/nanostructures exhibits excellent electrochemical properties. Characterization results confirm the coordination structure of the extracted cobalt complex (Co(NS)2•6H2O). Finally, compared to other selective metal extraction techniques, this strategy avoids additional separation and purification processes, thus improving the recycling efficiency. Overall, this route can be extended to selectively extract valuable metals from other types of cathode materials in spent LIBs as a sustainable approach.
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Affiliation(s)
- Xuejing Qiu
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
| | - Jiugang Hu
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
| | - Ye Tian
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
| | - Wentao Deng
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
| | - Yue Yang
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
| | - Debbie S Silvester
- School of Molecular and Life Sciences, Curtin University, GPO Box U1987, Perth, Western Australia 6845, Australia
| | - Guoqiang Zou
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
| | - Hongshuai Hou
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
| | - Wei Sun
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
| | - Yuehua Hu
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
| | - Xiaobo Ji
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China.
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13
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Lan J, Dong Y, Xiang Y, Zhang S, Mei T, Hou H. Selective recovery of manganese from electrolytic manganese residue by using water as extractant under mechanochemical ball grinding: Mechanism and kinetics. J Hazard Mater 2021; 415:125556. [PMID: 33752086 DOI: 10.1016/j.jhazmat.2021.125556] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 02/08/2021] [Accepted: 02/26/2021] [Indexed: 06/12/2023]
Abstract
This research aimed to address the issue of residual manganese in electrolytic manganese residue (EMR), which is difficult to recycle and can easily become an environmental hazard and resource waste. This research developed a method for the efficient and selective recovery of manganese from EMR and the removal of ammonia nitrogen (ammonium sulfate) under the combined action of ball milling and oxalic acid. The optimum process parameters of this method were obtained through single-factor experiment and response-surface model. Results showed that the recovery rate of manganese can exceed 98%, the leaching rate of iron was much lower than 2%, and the leaching rates of manganese and ammonia nitrogen after EMR ball grinding were 1.01 and 13.65 mg/L, respectively. Kinetics and mechanism studies revealed that ammonium salts were primarily removed in the form of ammonia, and that insoluble manganese (MnO2) was recovered by the reduction of FeS and FeS2 in EMR under the action of oxalic acid. Iron was solidified in the form of Fe2O3 and Fe2(SiO3)3. The technology proposed in this research has great industrial application value for the recycling and harmless treatment of EMR.
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Affiliation(s)
- Jirong Lan
- School of Resource and Environmental Sciences, Wuhan University, PR China; Hubei Environmental Remediation Material Engineering Technology Research Center, Wuhan 430072, PR China
| | - Yiqie Dong
- School of Resource and Environmental Sciences, Wuhan University, PR China; Hubei Environmental Remediation Material Engineering Technology Research Center, Wuhan 430072, PR China
| | - Yuwei Xiang
- School of Resource and Environmental Sciences, Wuhan University, PR China; Hubei Environmental Remediation Material Engineering Technology Research Center, Wuhan 430072, PR China
| | - Shanshan Zhang
- School of Resource and Environmental Sciences, Wuhan University, PR China; Hubei Environmental Remediation Material Engineering Technology Research Center, Wuhan 430072, PR China
| | - Tao Mei
- School of Resource and Environmental Sciences, Wuhan University, PR China; Hubei Environmental Remediation Material Engineering Technology Research Center, Wuhan 430072, PR China
| | - Haobo Hou
- School of Resource and Environmental Sciences, Wuhan University, PR China; Hubei Environmental Remediation Material Engineering Technology Research Center, Wuhan 430072, PR China.
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14
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Ma Y, Tang J, Wanaldi R, Zhou X, Wang H, Zhou C, Yang J. A promising selective recovery process of valuable metals from spent lithium ion batteries via reduction roasting and ammonia leaching. J Hazard Mater 2021; 402:123491. [PMID: 32736178 DOI: 10.1016/j.jhazmat.2020.123491] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Revised: 06/30/2020] [Accepted: 07/13/2020] [Indexed: 05/24/2023]
Abstract
In this study, a promising process has been developed for selective recovery of valuable metals from spent lithium ion batteries (LIBs). First, reduction roasting which used spent anode powder as reduction agent and water immersion are applied to preferentially recover lithium. Subsequently, an ammonia leaching method is adopted to eff ;ectively separate nickel and cobalt from water immersion residue. Results indicate that Li2CO3, (NiO)m·(MnO)n, Ni, Co are the ultimate reduction products at 650 °C for 1 h with 5% anode powder. 82.2 % Li is preferentially leached via water immersion after reduction roasting and Li2CO3 products are obtained by evaporation crystallization. Thermodynamics shows that reducing ammonia leaching is feasible for water immersion residue. Amounts of 97.7 % Ni and 99.1 % Co can be selectively leached by NH3·H2O and (NH4)2SO3 while Mn remain in the residue as (NH4)2Mn(SO3)2·H2O, (NH4)2Mn(SO4)2·6H2O and (NH4)2Mn2(SO3)3 under the optimized conditions. Ammonia leaching kinetic show the activation energy of Ni and Co is 84.44 kJ/mol and 91.73 kJ/mol, which indicate the controlling steps are the chemical reaction. Summarily, the whole process achieves the maximum degree of selective recovery and reduces the environmental pollution caused by the multistep purification.
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Affiliation(s)
- Yayun Ma
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Jingjing Tang
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China.
| | - Rizky Wanaldi
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Xiangyang Zhou
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Hui Wang
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Changyou Zhou
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Juan Yang
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China.
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15
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Qin L, Zhao Y, Wang L, Zhang L, Kang S, Wang W, Zhang T, Song S. Preparation of ion-imprinted montmorillonite nanosheets/chitosan gel beads for selective recovery of Cu(Ⅱ) from wastewater. Chemosphere 2020; 252:126560. [PMID: 32222519 DOI: 10.1016/j.chemosphere.2020.126560] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2020] [Revised: 03/14/2020] [Accepted: 03/18/2020] [Indexed: 06/10/2023]
Abstract
The novel ion-imprinted montmorillonite nanosheets/chitosan (IIMNC) gel beads were prepared for selective adsorption of Cu2+. The IIMNC gel beads were characterized by scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS). The results showed that IIMNC was successfully assembled and rich in honeycombed pores, which performed well in the removal of Cu2+ through the synergistic effect of montmorillonite nanosheets and chitosan. The elimination of copper was followed by pseudo-second-order model and was enhanced by introduced montmorillonite nanosheets (MMTNS) because MMTNS attracted Cu(Ⅱ) by its negative charge and provided active adsorption sites through its high performance of cation exchange. This composite gel also showed excellent reusability, performing well in the removal of Cu2+ after undergoing adsorption-desorption in five cycles, because the adsorption sites of MMTNS can be continually reactivated by NaOH solution. More importantly, its high selectivity for Cu2+ provides a feasible way to recover Cu2+ from wastewater containing various cations.
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Affiliation(s)
- Lei Qin
- Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China
| | - Yunliang Zhao
- Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China; Materials Research Institute, The Pennsylvania State University, University Park, PA, 16802, USA.
| | - Liang Wang
- Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China
| | - Lingbo Zhang
- Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China
| | - Shichang Kang
- Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China
| | - Wei Wang
- Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China
| | - Tingting Zhang
- Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China.
| | - Shaoxian Song
- Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China
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16
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Wen T, Zhao Y, Zhang T, Xiong B, Hu H, Zhang Q, Song S. Selective recovery of heavy metals from wastewater by mechanically activated calcium carbonate: Inspiration from nature. Chemosphere 2020; 246:125842. [PMID: 31927387 DOI: 10.1016/j.chemosphere.2020.125842] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 01/01/2020] [Accepted: 01/03/2020] [Indexed: 06/10/2023]
Abstract
In nature, the calcium carbonate shows different interactions with different metal ions. Inspiration from this natural phenomenon, in this work, the selective recovery of heavy metals from wastewater by mechanically activated calcium carbonate was investigated. The changes in Ca2+ concentration, pH value and metals uptake ratio of solution showed that M2+ (M = Cu, Mn, Zn and Ni) were endowed with different migration rules, resulting in the various interaction with the calcium carbonate in metal-bearing solution. The combination of XRD, SEM, and stereomicroscope affirmed that the adsorbed M2+ rarely change the lattice structure of calcium carbonate, while the adsorbed Cu2+ and Zn2+ could convert the mineral phase from calcium carbonate to posnjakite and hydrozincite, respectively. As a result of phase transition, 15% Cu2+ and 6% Zn2+ were uptaken with initial concentration of 1 mM for 100 min, however, the unsatisfactory recovery prevented the efficient recycling of metal. The mechanically activated calcium carbonate had a superior solubility at the solid/liquid interface, promoting mineral phase transformation on the premise of weak displacement adsorption. Hence, the uptake ratio of Cu2+ and Zn2+ were significantly increased to 99% and 53% at the same condition. Finally, Cu2+ was recovered from polymetallic systems from complex environment with high precision. The concept of selective recycling in this research guides the development of innovative processes from natural information.
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Affiliation(s)
- Tong Wen
- Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China
| | - Yunliang Zhao
- Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China; Materials Research Institute, The Pennsylvania State University, University Park, PA, 16802, USA.
| | - Tingting Zhang
- Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China.
| | - Bowen Xiong
- Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China
| | - Huimin Hu
- Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China
| | - Qiwu Zhang
- Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China
| | - Shaoxian Song
- Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China
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17
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Kholiya F, Rathod MR, Gangapur DR, Adimurthy S, Meena R. An integrated effluent free process for the production of 5-hydroxymethyl furfural (HMF), levulinic acid (LA) and KNS-ML from aqueous seaweed extract. Carbohydr Res 2020; 490:107953. [PMID: 32146239 DOI: 10.1016/j.carres.2020.107953] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 02/05/2020] [Accepted: 02/11/2020] [Indexed: 11/27/2022]
Abstract
This paper demonstrates an integrated zero liquid discharge (ZLD) process for time-dependent recovery of 5-hydroxymethyl furfural (HMF), levulinic acid (LA) and potassium, nitrogen and sulphur rich mother liquor (KNS-ML) - manure from agar/agarose containing seaweed aqueous solution using transition metal-free KHSO4 as an eco-friendly and reusable catalyst. The selectivity of HMF is higher at 115 °C in 3 h and favorable to LA in 6 h in autoclave conditions. The proposed concept could be fine-tuned for the selective production of 5-HMF (up to 91% yield) or levulinic acid (56% yield) in the presence of the KHSO4 catalyst. We have also achieved recyclability of KHSO4 up to nine (09) cycles and the gram-scale reaction has been demonstrated. The (KNS-ML) obtained after nine cycles followed by neutralization with ammonia solution utilized for manure makes the process zero-liquid discharge and more cost-effective. The efficacy of the KNS-ML after nine cycles has been tested on groundnut plants.
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Affiliation(s)
- Faisal Kholiya
- Natural Products & Green Chemistry Division, CSIR-Central Salt & Marine Chemicals Research Institute, G. B Marg, Bhavnagar, 364002, Gujarat, India
| | - Meena R Rathod
- Natural Products & Green Chemistry Division, CSIR-Central Salt & Marine Chemicals Research Institute, G. B Marg, Bhavnagar, 364002, Gujarat, India
| | - Doddabhimappa R Gangapur
- Natural Products & Green Chemistry Division, CSIR-Central Salt & Marine Chemicals Research Institute, G. B Marg, Bhavnagar, 364002, Gujarat, India
| | - S Adimurthy
- Natural Products & Green Chemistry Division, CSIR-Central Salt & Marine Chemicals Research Institute, G. B Marg, Bhavnagar, 364002, Gujarat, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-Central Salt & Marine Chemicals Research Institute, G. B Marg, Bhavnagar, 364002, Gujarat, India.
| | - Ramavatar Meena
- Natural Products & Green Chemistry Division, CSIR-Central Salt & Marine Chemicals Research Institute, G. B Marg, Bhavnagar, 364002, Gujarat, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-Central Salt & Marine Chemicals Research Institute, G. B Marg, Bhavnagar, 364002, Gujarat, India.
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18
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Petranikova M, Ssenteza V, Lousada CM, Ebin B, Tunsu C. Novel process for decontamination and additional valorization of steel making dust processing using two-step correlative leaching. J Hazard Mater 2020; 384:121442. [PMID: 31668760 DOI: 10.1016/j.jhazmat.2019.121442] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Revised: 09/18/2019] [Accepted: 10/08/2019] [Indexed: 06/10/2023]
Abstract
Recycling of steel making dusts often targets Zn removal. Other heavy metals such as Mo, W or Cr do not receive as much attention, and the decontamination of the dusts from these constituents is scarcely addressed in the literature. This study presents a novel approach of the selective separation of Mo from steel making dusts using alkaline solutions with low concentrations, before Zn removal using concentrated alkaline medium. Such an approach has never been reported before and can contribute to more efficient decontamination of the steel making dusts and will increase the value of recovered components since Mo can be significantly preconcentrated. Two samples originating from two steel producers were investigated. One sample contained 2.65% of Mo and 1.87% of Zn, and the second sample had 0.61% of Mo and 35.9% of Zn. Temperature was found to have a low impact on the leaching efficiency of Mo, while increased NaOH concentration promoted leaching of Zn. Excellent pre-concentration of Mo was achieved by using a S:L ratio of 1:3. Almost 5170 mg/L Mo, 1000 mg/L W, no Fe and only 2 mg/L Zn were present in the solution after leaching at 30 °C for 30 min. For the samples containing lower concentrations of Mo and high concentrations of Zn, the selectivity of the process was affected when using higher concentrations of NaOH. A final leachate containing 797 mg/L of Mo and only 11 mg/L Zn was obtained after leaching with 0.05 M NaOH. DFT computations showed that the 2D layered structures of MoO3 and WO3 are decisive factors that account for their high solubilites.
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Affiliation(s)
- Martina Petranikova
- Chalmers University of Technology, Department of Chemistry and Chemical Engineering, Nuclear Chemistry and Industrial Materials Recycling, Gothenburg, SE-412 96, Sweden.
| | - Vincent Ssenteza
- Chalmers University of Technology, Department of Chemistry and Chemical Engineering, Nuclear Chemistry and Industrial Materials Recycling, Gothenburg, SE-412 96, Sweden
| | - Cláudio M Lousada
- KTH Royal Institute of Technology, Department of Materials Science and Engineering, 114 28 Stockholm, Sweden
| | - Burçak Ebin
- Chalmers University of Technology, Department of Chemistry and Chemical Engineering, Nuclear Chemistry and Industrial Materials Recycling, Gothenburg, SE-412 96, Sweden
| | - Cristian Tunsu
- Chalmers University of Technology, Department of Chemistry and Chemical Engineering, Nuclear Chemistry and Industrial Materials Recycling, Gothenburg, SE-412 96, Sweden
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Gu F, Zhang Y, Peng Z, Su Z, Tang H, Tian W, Liang G, Lee J, Rao M, Li G, Jiang T. Selective recovery of chromium from ferronickel slag via alkaline roasting followed by water leaching. J Hazard Mater 2019; 374:83-91. [PMID: 30981016 DOI: 10.1016/j.jhazmat.2019.04.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Revised: 03/30/2019] [Accepted: 04/01/2019] [Indexed: 06/09/2023]
Abstract
Chromium was selectively recovered from ferronickel slag by roasting the slag with addition of Na2O2, followed by water leaching. The thermodynamic analysis revealed that in the presence of Na2O2 at appropriate temperatures, the Cr2O3 in the ferronickel slag can be converted to NaCrO2, instead of Na2CrO4, which prevents the formation of highly toxic Cr (VI). The experimental results confirmed that under the optimal alkaline roasting and water leaching conditions of the mass ratio of ferronickel slag to Na2O2 of 1, roasting temperature of 600 °C, roasting time of 1 h, leaching temperature of 50 °C, leaching time of 1 h, and liquid-to-solid ratio of 10 mL/g, 92.33% of Cr was leached with 64.28% of Na and 11.16% of Si and only 0.06 wt % Cr was left in the leaching residue. The high leaching percentage of Cr was a result of the transformation of Cr2O3 in the ferronickel slag to NaCrO2 with a loose structure during alkaline roasting that was beneficial to water dissolution. Compared to the traditional alkaline roasting process, the proposed more environmentally friendly method did not produce toxic Cr (VI) during recovery of chromium and the resulting residue has potential to be used as a good construction material.
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Affiliation(s)
- Foquan Gu
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan, 410083, China
| | - Yuanbo Zhang
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan, 410083, China.
| | - Zhiwei Peng
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan, 410083, China.
| | - Zijian Su
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan, 410083, China
| | - Huimin Tang
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan, 410083, China
| | - Weiguang Tian
- Guangdong Guangqing Metal Technology Co. Ltd., Yangjiang, Guangdong, 529500, China
| | - Guoshen Liang
- Guangdong Guangqing Metal Technology Co. Ltd., Yangjiang, Guangdong, 529500, China
| | - Joonho Lee
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, South Korea
| | - Mingjun Rao
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan, 410083, China
| | - Guanghui Li
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan, 410083, China
| | - Tao Jiang
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan, 410083, China
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20
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Zhu X, Li W, Tang S, Zeng M, Bai P, Chen L. Selective recovery of vanadium and scandium by ion exchange with D201 and solvent extraction using P507 from hydrochloric acid leaching solution of red mud. Chemosphere 2017; 175:365-372. [PMID: 28236706 DOI: 10.1016/j.chemosphere.2017.02.083] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Revised: 02/13/2017] [Accepted: 02/14/2017] [Indexed: 05/25/2023]
Abstract
D201 resin and P507 extractant diluted with sulfonated kerosene were used to respectively separate vanadium and scandium, and impurity ions from hydrochloric acid leaching solution of red mud. More than 99% of vanadium was selectively adsorbed from the hydrochloric acid leaching solution under the conditions of pH value of 1.8, volume ratio of leaching solution to resin of 10, and flow rate of 3.33 mL/min. Maximum extraction and separation of scandium was observed from the acid leaching solution at an aqueous pH value of 0.2. More than 99% of scandium can be selectively extracted using 15% P507, 5% TBP at the aqueous solution/organic phase (A/O) ratio of 10:1 for 6 min. The loaded organic phase was washed with 0.3 mol/L sulfuric acid, wherein most impurities were removed. After the process of desorption or stripping, precipitation, and roasting, high-purity V2O5 and Sc2O3 were obtained. Finally, a conceptual flow sheet was established to separate and recover vanadium and scandium from red mud hydrochloric acid leaching solution.
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Affiliation(s)
- Xiaobo Zhu
- School of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, Henan, 454000, China; Collaborative Innovation Center of Coal Mine Safety of Henan Province, Henan Polytechnic University, China.
| | - Wang Li
- School of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, Henan, 454000, China; Collaborative Innovation Center of Coal Mine Safety of Henan Province, Henan Polytechnic University, China.
| | - Sen Tang
- School of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, Henan, 454000, China; Collaborative Innovation Center of Coal Mine Safety of Henan Province, Henan Polytechnic University, China
| | - Majian Zeng
- School of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, Henan, 454000, China; Collaborative Innovation Center of Coal Mine Safety of Henan Province, Henan Polytechnic University, China
| | - Pengyuan Bai
- School of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, Henan, 454000, China; Collaborative Innovation Center of Coal Mine Safety of Henan Province, Henan Polytechnic University, China
| | - Lunjian Chen
- School of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, Henan, 454000, China; Collaborative Innovation Center of Coal Mine Safety of Henan Province, Henan Polytechnic University, China
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21
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Sethurajan M, Huguenot D, Jain R, Lens PNL, Horn HA, Figueiredo LHA, van Hullebusch ED. Leaching and selective zinc recovery from acidic leachates of zinc metallurgical leach residues. J Hazard Mater 2017; 324:71-82. [PMID: 26832075 DOI: 10.1016/j.jhazmat.2016.01.028] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Revised: 01/08/2016] [Accepted: 01/11/2016] [Indexed: 05/13/2023]
Abstract
Zinc (Zn) leaching yields and kinetics from three different zinc plant leach residues (ZLR) generated in different periods (ZLR1>30 years, ZLR2 5-30 years and ZLR3<2 years) were investigated. The factors affecting the Zn leaching rate such as solid to liquid ratio, temperature, acid concentration and agitation were optimized. Under optimum conditions, 46.2 (±4.3), 23.3 (±2.7) and 17.6 (±1.2) mg of Zn can be extracted per gram of ZLR1, ZLR2 and ZLR3, respectively. The Zn leaching kinetics of ZLRs follow the shrinking core diffusion model. The activation energy required to leach Zn from ZLR1, ZLR2 and ZLR3 were estimated to be 2.24kcal/mol, 6.63kcal/mol and 11.7kcal/mol, respectively, by the Arrhenius equation. The order of the reaction with respect to the sulfuric acid concentration was also determined as 0.20, 0.56, and 0.87 for ZLR1, ZLR2 and ZLR3, respectively. Zn was selectively recovered from the leachates by adjusting the initial pH and by the addition of sodium hydroxide and sodium sulfide. More than 90% of Zn was selectively recovered as sphalerite from the ZLR polymetallic leachates by chemical sulfide precipitation.
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Affiliation(s)
- Manivannan Sethurajan
- Université Paris-Est, Laboratoire Géomatériaux et Environnement (LGE), EA 4508, UPEM, 77454, Marne-la-Vallée, France; UNESCO-IHE Institute for Water Education, Westvest 7, 2611, AX Delft, the Netherlands; Universidade Federal de Minas Gerais, NGqA-CPMTC, Instituto de Geociências, Av. Antônio Carlos, 6627, Pampulha, Belo Horizonte, MG, 31270-901, Brazil
| | - David Huguenot
- Université Paris-Est, Laboratoire Géomatériaux et Environnement (LGE), EA 4508, UPEM, 77454, Marne-la-Vallée, France
| | - Rohan Jain
- UNESCO-IHE Institute for Water Education, Westvest 7, 2611, AX Delft, the Netherlands
| | - Piet N L Lens
- UNESCO-IHE Institute for Water Education, Westvest 7, 2611, AX Delft, the Netherlands
| | - Heinrich A Horn
- Universidade Federal de Minas Gerais, NGqA-CPMTC, Instituto de Geociências, Av. Antônio Carlos, 6627, Pampulha, Belo Horizonte, MG, 31270-901, Brazil
| | - Luiz H A Figueiredo
- Universidade Estadual de Montes Claros, Solos e nutrição de plantas, Avenida Reinaldo Viana, 2630, Bico da Pedra-Janauba, MG 39440-000, Brazil
| | - Eric D van Hullebusch
- Université Paris-Est, Laboratoire Géomatériaux et Environnement (LGE), EA 4508, UPEM, 77454, Marne-la-Vallée, France.
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22
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Sethurajan M, Huguenot D, Lens PNL, Horn HA, Figueiredo LHA, van Hullebusch ED. Leaching and selective copper recovery from acidic leachates of Três Marias zinc plant (MG, Brazil) metallurgical purification residues. J Environ Manage 2016; 177:26-35. [PMID: 27074201 DOI: 10.1016/j.jenvman.2016.03.041] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2016] [Revised: 03/21/2016] [Accepted: 03/25/2016] [Indexed: 06/05/2023]
Abstract
Zinc plant purification residue (ZPR), a typical Zn-hydrometallurgical waste, was collected from the Três Marias Zn plant (MG, Brazil). ZPR was characterized for its metal content and fractionation, mineralogy, toxicity and leachability. Toxicity characteristics leaching procedure (TCLP) and European Community Bureau of Reference (BCR) sequential extraction results revealed that this ZPR displays high percentages of metals (Cd, Cu, Zn and Pb) in the highly mobilizable fractions, increasing its hazardous potential. Bulk chemical analysis, pH dependent leaching and acid (H2SO4) leaching studies confirm that the ZPR is polymetallic, rich in Cd, Cu and Zn. The sulfuric acid concentration (1 M), agitation speed (450 rpm), temperature (40 °C) and pulp density (20 g L(-1)) were optimized to leach the maximum amount of heavy metals (Cd, Cu and Zn). Under optimum conditions, more than 50%, 70% and 60% of the total Cd, Cu and Zn present in the ZPR can be leached, respectively. The metals in the acid leachates were investigated for metal sulfide precipitation with an emphasis on selective Cu recovery. Metal sulfide precipitation process parameters such as initial pH and Cu to sulfide ratio were optimized as pH 1.5 and 1:0.5 (Cu:sulfide) mass ratio, respectively. Under optimum conditions, more than 95% of Cu can be selectively recovered from the polymetallic ZPR leachates. The Cu precipitates characterization studies reveal that they are approximately 0.1 μm in diameter and mainly consist of Cu and S. XRD analysis showed covellite (CuS), chalcanthite (CuSO4·5H2O) and natrochalcite (NaCu2(SO4)2(OH)·H2O) as the mineral phases. ZPRs can thus be considered as an alternative resource for copper production.
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Affiliation(s)
- Manivannan Sethurajan
- Université Paris-Est, Laboratoire Géomatériaux et Environnement (LGE), EA 4508, UPEM, 77454, Marne-la-Vallée, France; UNESCO-IHE Institute for Water Education, Westvest 7, 2611 AX, Delft, The Netherlands; Universidade Federal de Minas Gerais, NGqA-CPMTC, Instituto de Geociências, Av. Antônio Carlos, 6627, Pampulha, Belo Horizonte, MG, 31270-901, Brazil
| | - David Huguenot
- Université Paris-Est, Laboratoire Géomatériaux et Environnement (LGE), EA 4508, UPEM, 77454, Marne-la-Vallée, France
| | - Piet N L Lens
- UNESCO-IHE Institute for Water Education, Westvest 7, 2611 AX, Delft, The Netherlands
| | - Heinrich A Horn
- Universidade Federal de Minas Gerais, NGqA-CPMTC, Instituto de Geociências, Av. Antônio Carlos, 6627, Pampulha, Belo Horizonte, MG, 31270-901, Brazil
| | - Luiz H A Figueiredo
- Universidade Estadual de Montes Claros, Solos e nutrição de plantas, Avenida Reinaldo Viana, 2630, Bico da Pedra, Janauba, MG, 39440-000, Brazil
| | - Eric D van Hullebusch
- Université Paris-Est, Laboratoire Géomatériaux et Environnement (LGE), EA 4508, UPEM, 77454, Marne-la-Vallée, France.
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23
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Hiromori K, Shibasaki-Kitakawa N, Nakashima K, Yonemoto T. Novel simple process for tocopherols selective recovery from vegetable oils by adsorption and desorption with an anion-exchange resin. Food Chem 2016; 194:1-5. [PMID: 26471519 DOI: 10.1016/j.foodchem.2015.07.137] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Revised: 07/06/2015] [Accepted: 07/28/2015] [Indexed: 11/24/2022]
Abstract
A novel and simple low-temperature process was used to recover tocopherols from a deodorizer distillate, which is a by-product of edible oil refining. The process consists of three operations: the esterification of free fatty acids with a cation-exchange resin catalyst, the adsorption of tocopherols onto an anion-exchange resin, and tocopherol desorption from the resin. No degradation of tocopherols occurred during these processes. In the tocopherol-rich fraction, no impurities such as sterols or glycerides were present. These impurities are commonly found in the product of the conventional process. This novel process improves the overall recovery ratio and the mass fraction of the product (75.9% and 51.0wt%) compared with those in the conventional process (50% and 35wt%).
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24
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Banu K, Shimura T, Sadeghi S. Selective detection and recovery of gold at tannin-immobilized non-conducting electrode. Anal Chim Acta 2015; 853:207-213. [PMID: 25467460 PMCID: PMC4618489 DOI: 10.1016/j.aca.2014.09.030] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2014] [Revised: 09/15/2014] [Accepted: 09/19/2014] [Indexed: 01/07/2023]
Abstract
A tannin-immobilized glassy carbon electrode (TIGC) was prepared via electrochemical oxidation of the naturally occurring polyphenolic mimosa tannin, which generated a non-conducting polymeric film (NCPF) on the electrode surface. The fouling of the electrode surface by the electropolymerized film was evaluated by monitoring the electrode response of ferricyanide ions as a redox marker. The NCPF was permselective to HAuCl4, and the electrochemical reduction of HAuCl4 to metallic gold at the TIGC electrode was evaluated by recording the reduction current during cyclic voltammetry measurement. In the mixed electrolyte containing HAuCl4 along with FeCl3 and/or CuCl2, the NCPF remained selective toward the electrochemical reduction of HAuCl4 into the metallic state. The chemical reduction of HAuCl4 into metallic gold was also observed when the NCPF was inserted into an acidic gold solution overnight. The adsorption capacity of Au(III) on tannin-immobilized carbon fiber was 29±1.45 mg g(-1) at 60°C. In the presence of excess Cu(II) and Fe(III), tannin-immobilized NCPF proved to be an excellent candidate for the selective detection and recovery of gold through both electrochemical and chemical processes.
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Affiliation(s)
- Khaleda Banu
- Department of Molecular & Medical Pharmacology, University of California, Los Angeles, CA 90095, United States; Venture Business Laboratory, Center for Advanced Science and Innovation, Osaka University, Suita, Osaka 565-0871, Japan.
| | - Takayoshi Shimura
- Venture Business Laboratory, Center for Advanced Science and Innovation, Osaka University, Suita, Osaka 565-0871, Japan; Department of Material & Life Science, Division of Advanced Science and Biotechnology, Graduate School of Engineering, Osaka University, Japan
| | - Saman Sadeghi
- Department of Molecular & Medical Pharmacology, University of California, Los Angeles, CA 90095, United States.
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25
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Fan R, Xie F, Guan X, Zhang Q, Luo Z. Selective adsorption and recovery of Au(III) from three kinds of acidic systems by persimmon residual based bio-sorbent: a method for gold recycling from e-wastes. Bioresour Technol 2014; 163:167-171. [PMID: 24811444 DOI: 10.1016/j.biortech.2014.03.164] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2014] [Revised: 03/29/2014] [Accepted: 03/31/2014] [Indexed: 06/03/2023]
Abstract
A low cost bio-sorbent, named "PPF resin", was prepared by crosslinking the persimmon residual with formaldehyde. The adsorption behavior of PPF resin towards Au(III) from varied HCl and HNO3 concentration solutions was studied. PPF resin could adsorb almost complete Au(III) from high acidic systems. The influence of dilution ratio, solid-liquid ratio and time towards Au(III) from aqua regia leached PCBs liquor was censored in detail by batch and continuous adsorption methods. The PPF resin before and after adsorption was characterized by FT-IR, XRD and XPS spectra which provided evidences for the reduction of Au(III) to Au(0) with a proposed mechanism of Au(III) adsorption-reduction process. After saturated column adsorption of 0.1g PPF resin, 0.0506 g gold (purity: 99.9%) was obtained by the method of incineration. The present results provide a new approach for gold recovery from the secondary resources.
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Affiliation(s)
- Ruiyi Fan
- Key Laboratory of Horticultural Plant Biology (MOE), Huazhong Agricultural University, 430070 Wuhan, China
| | - Feng Xie
- Key Laboratory of Horticultural Plant Biology (MOE), Huazhong Agricultural University, 430070 Wuhan, China; Institute of Horticultural Sciences, Jiangxi Academy of Agricultural Sciences, 330200 Nanchang, China
| | - Xueliang Guan
- Key Laboratory of Horticultural Plant Biology (MOE), Huazhong Agricultural University, 430070 Wuhan, China
| | - Qinglin Zhang
- Key Laboratory of Horticultural Plant Biology (MOE), Huazhong Agricultural University, 430070 Wuhan, China
| | - Zhengrong Luo
- Key Laboratory of Horticultural Plant Biology (MOE), Huazhong Agricultural University, 430070 Wuhan, China.
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