Bioleaching: metal solubilization by microorganisms

Bosecker, K.

doi:10.1111/j.1574-6976.1997.tb00340.x

Cited by 731 publications

(317 citation statements)

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“…Representatives of Bacillus have been reported to efficiently solubilize metals and thus contribute to metal leaching without any benefit to themselves [7] [33]. Only one other study found Bacillus from steelmaking waste sources.…”

Section: Discussionmentioning

confidence: 99%

“…This biotechnological process is based on the ability of microorganisms to oxidize ferrous iron and/or reduce sulfur compounds [4]. The predominant metal-sulfide-dissolving bacteria that have been extensively used for the bioleaching of sulfide minerals with commercial interest are extremely acidophilic [5] [6] although heterotrophic bacteria can also contribute to metal leaching [7].…”

Section: Introductionmentioning

confidence: 99%

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Phylogeny of Bacteria from Steelmaking Wastes and Their Acidic Enrichment Cultures

Reis¹,

Pinheiro²,

Costa³

et al. 2014

AiM

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Currently, millions of tons of steel are produced worldwide. This has become a serious economic and environmental challenge because the ores used for steel production are nonrenewable resources and the production generates huge amount of waste. In this study, we identified and investigated the ability of bacteria from steelmaking waste with low and high zinc concentration to promote leaching of zinc, when enriched by acidic (pH 2) culture conditions. The bioleaching assays indicated removal of Zn, as in chemical leaching. Bacterial communities from crude and enrichment culture wastes were characterized by the 16S rRNA gene. Phylogenetic analysis of the generated clone libraries revealed predominance of Proteobacteria and Firmicutes. The Actinobacteria, Bacteroidetes, Cyanobacteria, and Deinococcus-Thermus phyla were also encountered. The clones were most closely related to cultivable heterotrophic bacteria. Different genera were identified including iron redox cycling and leaching bacteria such as Chromobacterium, Aeromonas, Escherichia, Bacillus, and Ochrobactrum. These data add significant new information on bacteria which survive in extremely acidic conditions. They are distantly related to typical acidophiles responsible for the leaching process, which makes them good candidates for future studies on metal bioleaching.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Phylogeny of Bacteria from Steelmaking Wastes and Their Acidic Enrichment Cultures

Reis¹,

Pinheiro²,

Costa³

et al. 2014

AiM

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“…O uso de consórcios microbianos de bactérias autotróficas e bactérias ou fungos heterotróficos tem sido descrito na literatura. A produção de ácido lático, oxálico, cítrico e glucônico, por exemplo, auxiliam na solubilização direta do metal para a líxivia tanto pela troca direta de cátions quanto pela formação de complexos metálicos solúveis e quelatos [41].…”

Section: áCidos Orgânicosunclassified

Biolixiviação: Uma Avaliação Das Inovações Tecnológicas Na Biomineração De Minerais Sulfetados No Período De 1991 a 2015

Giese¹

2017

Tecnologia Em Metalurgia Materiais E Mineração

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2176-1523 © ano Associação Brasileira de Metalurgia, Materiais e Mineração. Publicado pela ABM. Este é um artigo de acesso aberto distribuído sob os termos da licença Creative Commons CC BY-NC-ND (Attribution-NonCommercial-NoDerivs) -https:// creativecommons.org/licenses/by-nc-nd/4.0/. a Resumo O desenvolvimento de inovações tecnológicas nos processos de biolixiviação tem sido constante, principalmente, pelo fato dos processos biohidrometalúrgicos oferecerem vantagens frente às plantas convencionais, v. g., a diminuição dos custos operacionais e de geração de resíduos. O objetivo deste trabalho foi avaliar o perfil das competências tecnológicas relacionadas à este processo através do estudo das patentes depositadas na base de dados da Organização Mundial de Propriedade Intelectual (OMPI) nos últimos 25 anos. Observou-se que, entre os anos de 1991 e 2015, cerca de 328 patentes foram depositadas na Patentscope, destacando-se a China e EUA que somados detém igualmente 44% dos registros. A partir dos resultados obtidos nesta pesquisa, foi traçado um paralelo entre os depósitos de patentes e a economia mineral. A análise dos dados obtidos permitiu descrever as tecnologias preferencialmente protegidas dos processos de biolixiviação. Palavras-chave: Bio-hidrometalurgia; Biolixiviação; Patentes. BIOLEACHING: AN EVALUATION OF TECHNOLOGICAL INNOVATIONS ON THE SULPHIDE MINERALS IN THE PERIOD OF 1991 TO 2015 AbstractThe development of technological innovations in bioleaching has been constant, especially, the use of these biohydrometallurgical processes offer advantages over conventional plants, such as lower operating costs and waste generation. The objective of this study was to evaluate the potential of technological competence related to this process through the analysis of patents in the database of the World Intellectual Property Organization (WIPO) in the last 25 years. It was observed that between the years 1991 and 2015, about 328 patents were filed in Patenstcope, especially China and USA which added also holds 44% of the documents. From obtained results, it has drawn a parallel between the patent deposits and the mineral economy. The analysis of the data allowed describing the technologies protected preferably of bioleaching processes. Keywords: Biohydrometallurgy; Bioleaching; Patents. INTRODUÇÃOA cadeia produtiva da metalurgia de minerais não-ferrosos, de maneira geral, envolve processos de concentração (moagem, britagem, flotação e secagem), seguido de pirometalurgia ou hidrometalurgia [1,2]. Todavia, estes processos convencionais não se apresentam economicamente viáveis para a extração de metais a partir de minérios oxidados ou minérios de baixo teor notadamente pelos elevados custos de energia e insumos despendidos [3,4].Em virtude disso, paulatinamente, surgiu a necessidade de se buscar alternativas dentro de um cenário da hidrometalurgia extrativa: a) expectativa com a diminuição dos recursos minerais; b) necessidades comerciais se ampliando devido ao desenvolvimento tecnológico; c) aumento da produção de ...

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“…광미의 위해도를 저감시키기 위해 고형화/안정화 (Desogus et al 2013)가 적용되고 있지만, 처리 후 광미에 대한 재이용 용도가 불분명하여 적치 또는 매립되고 있는 실정이다 (Bian et al 2012). Acidithiobacillus ferrooxidans와 같 은 철산화균을 이용하여 광미로부터 유용원소를 회수하기 위한 방안으로 활용되어온 생물학적 침출법 (bioleaching) 또한 광미의 위해도 저감기술의 하나로써 활용될 수 있다 (Bosecker 1997, Park et al 2014, Nguyen et al 2015.…”

Section: 서 론unclassified

Application of Galvanic Oxidation and Pyrite Dissolution for Sustainable In-Situ Mine Tailings Treatment

Ju¹,

Jho²,

Nam³

2016

Ecology and Resilient Infrastructure

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ABSTRACT:Mine tailings generated during mining activity often contain high concentrations of heavy metals, with pyrite-containing mine tailings in particular being a major cause of environmental problems in mining areas. Chemical cell technology, or fuel cell technology, can be applied to leach heavy metals in pyrite-containing mine tailings. As pyrite dissolves through spontaneous oxidation (i.e. galvanic oxidation) in the anode compartment of the cell, Fe 3+ , sulfuric acid are generated. A decrease in pH due to the generation of sulfuric acid allows heavy metals to be leached from pyrite-containing mine tailings. In this study, pyrite was dissolved for 4 weeks at 23°C in an acidic solution (pH 2) and in a galvanic reactor, which induces galvanic oxidation, and total Fe leached from pyrite and pH were compared in order to investigate if galvanic oxidation can facilitate pyrite oxidation. The change in the pyrite surface was analyzed using a scanning electron microscope (SEM). Comparing the total Fe leached from the pyrite, there were 2.9 times more dissolution of pyrite in the galvanic reactor than in the acidic solution, and thus pH was lower in the galvanic reactor than in the acidic solution. Through SEM analysis of the pyrite that reacted in the galvanic reactor, linear-shaped cracks were observed on the surface of the pyrite. The study results show that pyrite dissolution was facilitated through the galvanic oxidation in the galvanic reactor, and also implied that the galvanic oxidation can be one remediation option for pyrite-containing mine tailings.

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Bioleaching: metal solubilization by microorganisms

Cited by 731 publications

References 45 publications

Phylogeny of Bacteria from Steelmaking Wastes and Their Acidic Enrichment Cultures

Phylogeny of Bacteria from Steelmaking Wastes and Their Acidic Enrichment Cultures

Biolixiviação: Uma Avaliação Das Inovações Tecnológicas Na Biomineração De Minerais Sulfetados No Período De 1991 a 2015

Application of Galvanic Oxidation and Pyrite Dissolution for Sustainable In-Situ Mine Tailings Treatment

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