Factors influencing bioleaching copper from waste printed circuit boards by Acidithiobacillus ferrooxidans

Yang, Tao; Zheng, Xu; Wen, Jiankang; Yang, Limei

doi:10.1016/j.hydromet.2008.12.011

Cited by 214 publications

(101 citation statements)

References 8 publications

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“…Bioleaching technology was only investigated recently to process polymetallic wastes such as printed circuit boards (PCB) (Wang and et al, 2009;Yang et al, 2009;Liang et al, 2010;Xiang et al, 2010), electronic scraps (Brandl et al, 2001;Ilyas et al, 2007) shredder residues (Lewis et al, 2011). For this purpose, chemolithotrophic bacteria from the specie Acidithiobacillus ferrooxidans were mostly studied as a mean to regenerate ferric from ferrous iron.…”

Section: Introductionmentioning

confidence: 99%

“…For this purpose, chemolithotrophic bacteria from the specie Acidithiobacillus ferrooxidans were mostly studied as a mean to regenerate ferric from ferrous iron. High metal recoveries were reported for bioleaching of Cu from electronic scrap (Brandl et al, 2001) and PCB (Wang et al, 2009;Yang et al, 2009). In previous projects we have investigated the feasibility of bacterially assisted leaching to bring zero-valent copper in solution from similar material.…”

Section: Introductionmentioning

confidence: 99%

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Copper leaching from waste electric cables by biohydrometallurgy

Lambert

Gaydardzhiev

Léonard

et al. 2015

Minerals Engineering

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a b s t r a c tThis study examines the leaching of copper from waste electric cables by chemical leaching and leaching catalysed by Acidithiobacillus ferrooxidans in terms of leaching kinetics and reagents consumption. Operational parameters such as the nature of the oxidant (Fe 3+ , O 2 ), the initial ferric iron concentration (0-10 g/L) and the temperature (21-50°C) were identified to have an important influence on the degree of copper solubilisation. At optimal process conditions, copper extraction above 90% was achieved in both leaching systems, with a leaching duration of 1 day. The bacterial leaching system slightly outperformed the chemical one but the positive effect of regeneration of Fe 3+ was limited. It appears that the Fe 2+ bio-oxidation is not sufficiently optimised. Best results in terms of copper solubilisation kinetics were obtained for the abiotic test at 50°C and for the biotic test at 35°C. Moreover, the study showed that in same operating conditions, a lower acid consumption was recorded for the biotic test than for the abiotic test.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Copper leaching from waste electric cables by biohydrometallurgy

Lambert

Gaydardzhiev

Léonard

et al. 2015

Minerals Engineering

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“…Resultados similares são obtidos por Ilyas et al (18) e Yang et al (19) que estudam a recuperação de cobre de placas de circuito impresso em frascos agitados obtendo taxas de extração de cobre maiores que 70%.…”

Section: Introductionunclassified

“…Alguns estudos (18)(19)(20)(21) reportam a toxicidade das placas de circuito impresso, e apesar da adaptação bacteriana aumentar a tolerância aos íons metálicos, provavelmente devido à quantidade de placas de circuito impresso adicionadas ao meio lixiviante, nas densidades de polpa de 30 gL -1 , 45 gL -1 , 60 gL -1 e 75 gL -1 , pode ter ocorrido um aumento da condição de lise das células além de prejudicar o processo de transferência de massa. (19) No entanto, segundo Brandl, Bosshard e Wegmann, (20) os componentes e mecanismos responsáveis por essa toxicidade ainda não foram estudados, mas microrganismos crescem bem em concentrações menores que 10 gL ) de íon férrico (9) .…”

Section: Introductionunclassified

Lixiviação Bacteriana De Sucata Eletrônica: Influência Dos Parâmetros De Processo

Yamane¹,

Espinosa²,

Tenório³

2013

TMM

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ResumoA aplicação de lixiviação bacteriana no tratamento de minérios já é conhecida e pode também ser aplicada no tratamento de resíduos eletrônicos para a recuperação de cobre. Este trabalho investiga a influência dos parâmetros de processo (densidade de polpa, volume de inóculo, velocidade de rotação e concentração inicial de íon ferroso) na lixiviação bacteriana de cobre de placas de circuito impresso de computadores usando a bactéria Acidithiobacillus ferrooxidans-LR. Placas de circuito impresso de computadores foram trituradas em moinho martelo, o pó obtido foi separado magnéticamente e o material não-magnético foi utilizado neste estudo. Foi realizado um estudo de frascos agitados com o material não-magnético utilizando um shaker. Os resultados mostram que a Acidithiobacillus ferrooxidans-LR pode lixiviar 99% de cobre da placa de circuito impresso (material não magnético), sob as condições determinadas por meio dos estudos. Palavras-chave: Lixiviação bacteriana; Sucata eletrônica; Cobre; Placas de circuito impresso. BACTERIAL LEACHING OF ELECTRONIC SCRAP: INFLUENCE OF PROCESS PARAMETERS AbstractThe application of bacterial leaching in the ore treatment is already known and also can be applied such as treatment of electronic waste to copper recovery. This paper investigates the influence of process parameters (pulp density, inoculums volume, rotation speed and initial concentration of ferrous iron) on bacterial leaching of copper from printed circuit board of computers using the bacterium Acidithiobacillus ferrooxidans-LR. Printed circuit boards from computers were comminuted using a hammer mill. The powder obtained was magnetically separated and the non-magnetic material used in this study. A shake flask study was carried out on the non-magnetic material using a shaker. The results show that Acidithiobacillus ferrooxidans-LR can leach 99% of copper from printed circuit boards (non-magnetic material) under the determined conditions through of the studies.

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“…폐전자부품에 함유된 Au를 회수하기 위하여 왕수 (aqua regia), 시안(cyanide), 티오요소(thiourea), 티오 황산염(thiosulfate)과 같은 화학적 용매가 이용되고 있으며, 최근에는 Acidithiobacillus ferrooxidans, 혹은 Acithiobacillus thiooxidans 등과 같은 미생물들을 활 용하고 있다 (Hoffmann, 1992;Brandl et al, 2001;Yang et al, 2009;Xiang et al, 2010;Pant et al, 2012). 그러나 할로겐 원소에 해당되는 염소(chlorine) 를 이용하여 폐전자부품으로부터 Au를 용출 및 회수 하는 연구는 아직 미진하다.…”

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The Leaching and Recovery of Au from Scrap of PCBs

You¹,

Park²

2014

Journal of the Korean earth science society

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This study was carried out to find an environmental friendly and effective way to leach Au and Ag from scrap of Printed Circuit Boards (PCBs) using sodium-hypochlorite solution. In an EDS analysis, valuable metals such as Cu, Sn, Sb, Al, Ni, Pb and Au were all found in PCBs. The highest leaching rates obtained were 1% of pulp density with a chlorine:hypochlorite of 2:1 and a concentration of NaCl at 2 M. The highest Au recovery was observed with the addition of sodium metabisulfite to make a 3 M solution. It is confirmed that the leaching agent (chlorine-hypochlorite) could effectively leach Au and Ag from Printed Circuit Boards (scrap parts) and the additive reagent sodium metabisulfite could easily precipitate Au from the chlorine-hypochlorite solution.

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Factors influencing bioleaching copper from waste printed circuit boards by Acidithiobacillus ferrooxidans

Cited by 214 publications

References 8 publications

Copper leaching from waste electric cables by biohydrometallurgy

Copper leaching from waste electric cables by biohydrometallurgy

Lixiviação Bacteriana De Sucata Eletrônica: Influência Dos Parâmetros De Processo

The Leaching and Recovery of Au from Scrap of PCBs

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