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Bioleaching of low-grade copper sulfide ores by Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans

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Journal of Central South University 2014年第2期21卷 728-734页

作者：王军朱珊张雁生赵红波胡明皓杨聪仁覃文庆邱冠周 Key Laboratory of biohydrometallurgy of Ministry of Education (Central South University) School of Minerals Processing & Bioengineering Central South University

The grown conditions of Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans were investigated,and then experiments were conducted to research the bioleaching behaviors of crude ore of copper sulfide and hand-picked concentrates of chalcopyrite by Acidithiobacillus ferrooxidans and Acidithiobacillus *** experimental results show that the bacteria grow best when the temperature is(30±1) °C and the pH value is *** bacteria concentration is 2.24×107 mL-1 in this *** is found that the copper extraction yield is affected by the inoculum size and the pulp density and the extraction yield increases as the inoculum size *** bioleaching rates reach their highest point in sulfide copper and chalcopyrite with a pulp density of 5% and 10%,*** flotation experiments of low-grade copper sulfide ores show that the bioleaching recovery reaches nearly 45% after 75 days.

关键词： biohydrometallurgy chalcopyrite Acidithiobacillus ferrooxidans Acidithiobacillus thiooxidans copper sulfide ore

Influence of copper solvent extractant on microbial community structure of acidophilic microorganisms

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Journal of Central South University 2010年第6期17卷 1196-1200页

作者：陈勃伟李文娟刘兴宇周桂英温建康 National Engineering Laboratory of biohydrometallurgy General Research Institute for Nonferrous Metals

The influence of different concentrations of copper solvent extractant ZJ 988 on the growth and activity of acidophilic microorganisms was studied and the microbial community structures were compared by 16S rRNA gene clone library *** total bacteria numbers are reduced when 0.5%(volume fraction) extractant is *** proportions of Acidithiobacillus ferrooxidans and Acidiphilium organovorum are increased,whereas the proportion of Leptospirillum ferriphilum is *** the concentration of extractant is elevated to 1%,growth of all bacteria is *** library results reveal that the dominant bacteria in the culture solution with/without the extractant are ***,*** and *** sensitivity order of the three bacteria to the extractant from the most to the least is found to be ***>***>***.

关键词： extractant acidophile 16S rRNA gene biohydrometallurgy

Bioleaching of spent Ni-Cd batteries and phylogenetic analysis of an acidophilic strain in acidified sludge

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Frontiers of Environmental Science & Engineering 2007年第4期1卷 459-465页

作者： ZHAO Ling WANG Liang YANG Dong ZHU Nanwen School of Environmental Science and Engineering Shanghai Jiaotong UniversityShanghai 200240China

biohydrometallurgy is a novel method to recycle discarded batteries,in which sewage sludge is used as microorganisms and culture due to the presence of indigenous Thiobacilli.A two-step continuous flow leaching system consisting of an acidifying reactor and a leaching reactor was introduced to achieve the bioleaching of spent nickel-cadmium(Ni-Cd)*** acid supernatant produced in the acidifying reactor by the microorganisms with ferrous ions as the substrate was conducted into the leaching reactor to dissolve electrode *** efficiency of a batch treatment of batteries was *** results showed that the complete dissolution of two AA-sized Ni-Cd batteries with 0.6 L/d acid supernatant took about 30,20,and 35 days for Ni,Cd,and Co,*** the dissolution ability of the three metals was *** and Co can be leached mostly for pH below 4.0 while the complete dissolution of Ni can be achieved for pH below ***,a strain(named ***)accounting for the reduction of pH in the acidified sludge was isolated and *** was identified to be 100%similar to Acidithiobacillus ferrooxidans strain Tf-49 based on 16S rDNA sequence *** relevant phylogenetic tree constructed indicates that the strain should be classified into genus Acidithiobacillus ferrooxidans.

关键词： biohydrometallurgy spent Ni-Cd batteries 16S rDNA sequence analysis Acidithiobacillus ferrooxidans

Silver-catalyzed bioleaching for raw low-grade copper sulphide ores

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Frontiers of Chemical Science and Engineering 2009年第3期3卷 250-254页

作者： Tianlong DENG Yafei GUO Mengxia LIAO Dongchan LI College of Materials Chemistry and Chemical EngineeringChengdu University of TechnologyChengdu 610059China Qinghai Institute of Salt Lakes Chinese Academy of SciencesXining 810008China

This research was conducted to investigate the biooxidation and copper dissolution from raw low-grade refractory copper sulphide ores located in the Xinjiang Autonomous Region of China using adapted Thiobacillus ferrooxidans *** order to accelerate the bioleach-ing rate,the adapted mixed bacteria and silver ion catalyst were tested in the leach columns at laboratory *** overall acid consumption was 4.3kg sulphuric acid per kg of dissolved copper and was linearly related to the percent copper *** calculated copper dissolution rates obey the Shrinking Core *** relative activation energy of the whole biooxidative leaching stages was calculated to be 48.58kJ/mol.

关键词： green process biohydrometallurgy bioleach-ing reaction kinetics sulphide ores

Research and development trends of hydrometallurgy:An overview based on Hydrometallurgy literature from 1975 to 2019

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Transactions of Nonferrous Metals Society of China 2020年第11期30卷 3147-3160页

作者： Li-pan JIA Jiang-jiang HUANG Ze-long MA Xu-heng LIU Xing-yu CHEN Jiang-tao LI Li-hua HE Zhong-wei ZHAO School of Metallurgy and Environment Central South UniversityChangsha 410083China Hunan Key Laboratory for Metallurgy and Material Processing of Rare Metals Changsha 410083China

Modern hydrometallurgy has been developing for more than 100 years and the related articles keep piling *** on a bibliometric analysis of the articles in Hydrometallurgy,the most authoritative journal in the field of hydrometallurgy,we try to catch the research and development trends from a global ***,keywords burstness shows that rare earth,recycling,lithium,ionic liquid,and thorium are the hotspots in recent years,and the economic and technological reasons behind them were discussed in ***,the proportion of biohydrometallurgy grows fast from 5%to 13%and the related articles are almost all about *** are some new directions such as direct preparation of materials in hydrometallurgical processes and ion-imprinted ***,the advanced instrument analysis methods such as XAFS(X-ray absorption fine structure),gene sequencing,and micro-CT promote the deep understanding of hydrometallurgy ***,the cooperation network and contribution of the main institutes were mapped.

关键词： development trends leaching solvent extraction biohydrometallurgy electro-hydrometallurgy CiteSpace

MICROBE-METAL-INTERACTIONS FOR THE BIOTECHNOLOGICAL TREATMENT OF METAL-CONTAINING SOLID WASTE

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China Particuology 2006年第2期4卷 93-97页

作者： Helmut Brandl Mohammad A. Faramarzi Institute of Environmental Sciences University of Zurich Winterthurerstrasse 190 CH-8057 Zurich Switzerland Faculty of Pharmacy Department of Pharmaceutical Biotechnology Tehran University of Medical Sciences Tehran 14174 Iran

In nature, microbes are involved in weathering of rocks, in mobilization of metals from minerals, and in metal precipitation and deposition. These microbiological principles and processes can be adapted to treat particulate solid wastes. Especially the microbiological solubilization of metals from solid minerals （termed bioleaching） to obtain metal values is a well-known technique in the mining industry. We focus here on non-mining minerai wastes to demonstrate the applicability of mining-based technologies for the treatment of metal-containing solid wastes. In the case study presented, microbial metal mobilization from particulate fly ash （originating from municipal solid waste incineration） by Acidithiobacilli resulted in cadmium, copper, and zinc mobilization of 〉80%, whereas lead, chromium, and nickel were mobilized by 2, 11 and 32%, respectively. In addition, the potential of HCN-forming bacteria （Chromobacterium violaceum, Pseudornonas fluorescens） was investigated to mobilize metals when grown in the presence of solid materials （e.g.,copper-containing ores, electronic scrap, spent automobile catalytic converters）. C. violaceum was found capable of mobilizina nickel as tetracyanonickelate from fine-grained nickel powder. Gold was microbially solubJlized as dicyanoaurate from electronic waste. Additionally, cyanide-complexed copper was detected during biological treatment of shredded printed circuit-board scraps. Water-soluble copper and platinum cyanide were also detected during the treatment of spent automobile catalytic converters.

关键词： biohydrometallurgy bioleaching solid waste metal recovery cyanogens