Catalytic effect of graphene in bioleaching copper from waste printed circuit boards by Acidithiobacillus ferrooxidans

Gu, Weihua; Bai, Jianfeng; Dong, Bin; Zhuang, Xuning; Zhao, Jing; Chenglong, Zhang; Wang, Jingwei; Shih, Kaimin

doi:10.1016/j.hydromet.2017.05.012

Cited by 58 publications

(22 citation statements)

References 27 publications

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“…Efficiency and electric fields effects of Acidithiobacillus ferrooxidans and mixed culture were also proven in copper bioleaching from PCBs [216][217][218][219]. Furthermore, to enhance the bioleaching process, new catalyzed materials like biochar, nitrogen-doped carbon nanotubes (NCNTs), and new strategies were applied in hydrometallurgy fields [220][221][222]. Bioleaching of e-waste will be applied and developed for new applications, introducing more sustainable and practical ways to recover minerals and metals in the future [223,224].…”

Section: Enhanced Copper Bioleaching From Waste Printed Circuit Boardmentioning

confidence: 99%

Copper Bioleaching in China: Review and Prospect

et al. 2018

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The commercial application of copper bioleaching, an environmentally-friendly approach for low-grade and secondary mineral resources recycling, has increased worldwide since the 2000s. As the world's second-largest economic entity and the largest developing country, China has the largest demand for metal resources, significantly advancing the theory and industrial technology of copper bioleaching. This paper reviews the exploration and application of copper bioleaching in China. Two typical bioleaching applications and technological processes, bioheap leaching at the Zijinshan Copper Mine and bioheap leaching at the Dexing Copper Mine, are introduced. The considerable research completed by researchers is summarized, especially focusing on the isolation and identification of leaching bacteria, the bioleaching mechanism and interface reactions, multistage percolation behavior, bioleaching system reconstruction, the multiphysics coupled model, and enhanced copper bioleaching from waste printed circuit boards (WPCBs). Based on this investigation in China, key trends and prospects in copper bioleaching-such as efficiency improvement, environmental protection, and improved technology applications-are proposed.

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Section: Enhanced Copper Bioleaching From Waste Printed Circuit Boardmentioning

confidence: 99%

Copper Bioleaching in China: Review and Prospect

et al. 2018

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“…Most of the studies also show that staggering the biological production of a lixiviant acidic solution containing Fe(III) and the addition of PCBs increases bioleaching efficiency, probably by lowering the toxicity of PCBs for microbial growth (Liang et al, 2013, Brandl et al, 2001). Figure 1 shows Cu dissolution kinetics determined in studies addressing PCB bioleaching (Adhapure et al, 2013;Arshadi and Mousavi, 2014;Arshadi and Mousavi, 2015;Bai et al, 2009;Bai et al, 2016;Bas et al, 2013;Brandl et al, 1999;Bryan et al, 2015;Chen et al, 2015;Choi et al, 2004;Gu et al, 2014;Gu et al, 2017a;Gu et al, 2017b;Guezennec et al, 2015;Ilyas et al, 2007;Ilyas et al, 2010;Ilyas et al, 2013;Ilyas et Lee, 2014;Işildar et al, 2015;Liang et al, 2010;Liang et al, 2013;Liang et al, 2016;Mäkinen et al, 2015;Mrážiková et al, 2013;Mrážiková et al, 2015;Mrážiková et al, 2016;Nie et al, 2014;Nie et al, 2015;Priya and Hait, 2018;Rodrigues et al, 2015;Shah et al, 2014;Shah et al, 2015;Silva et al, 2015;Sodha et al, 2017;Wang et al, 2009;Wang et al, 2016;Wang et al, 2018;…”

Section: Introductionmentioning

confidence: 99%

Recovery of metals in a double-stage continuous bioreactor for acidic bioleaching of printed circuit boards (PCBs)

Hubau

Minier

Chagnes

et al. 2020

Separation and Purification Technology

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Many studies are now focusing on bioleaching methods to recover metals from WEEE. The efficiency of this process is highly dependent on microorganisms but also on the solid-liquidgas mass transfer, which is controlled by the reactor design. In this study, bioleaching of comminuted spent printed circuit boards (PCBs) was performed in a stirred tank reactor operated in batch mode and in a double-stage continuous bioreactor. The metal dissolution kinetics were compared. The first stage of the continuous bioreactor was a bubble column in which a BRGM-KCC acidophilic consortium comprising Leptospirillum ferriphilum and Sulfobacillus benefaciens was used to oxidise Fe(II) into Fe(III). The resulting liquor was used to leach out metals contained in PCBs in the second stage of the bioreactor with mechanical stirring. The use of two distinct stages allowed the bacteria to adapt gradually to the PCBs and reach high dissolution yields, i.e. 96% Cu, 73% Ni, 85% Zn and 93% Co when 1% (w/v) PCB scraps were added into the bioleaching reactor, with a hydraulic residence time of 48 hours. By using the double-stage bioreactor, the concentration of PCB scraps could be increased up to 1.8% (w/v) without reducing bioleaching performance. Biomass concentration in the second stage and adaptation of the microorganisms to the toxicity of the metals were sufficient for only the second stage to be used. Under these conditions, the dissolution kinetics were stable, even when iron was provided only by the comminuted PCBs.

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“…Among the different microorganisms (fungus and bacteria) used in bioleaching processes, Acidithiobacillus ferrooxidans is the widest studied bacteria of all extremely acidophilic prokaryotes [19]. PCB bioleaching using Acidithiobacillus ferrooxidans is reported in several studies [20][21][22].…”

Section: Mechanical Processingmentioning

confidence: 99%

Combined Mechanical Bio-Hydrometallurgical Recycling Process of Printed Circuit Boards in Brazil

Yamane¹,

Ulsen²,

Espinosa³

et al. 2020

TMM

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Precious metal content is much higher in electronic waste than in most worldwide mines, and therefore recycling is encouraged and mostly performed by hydrometallurgical and pyrometallurgical processes. This paper addresses a combined mechanical bio-hydrometallurgical recycling process for extracting gold, copper and iron from printed circuit boards as a less expensive technology feasible for the Brazilian context. Metal recovery was carried out by combining physical, chemical and biological processes. The combined process proved to be technically viable; the microbiological route using adapted bacteria Acidithiobacillus ferrooxidans-LR is also eco-friendly. Mechanical processes recovered 97% of the iron by magnetic separation, the bioleaching extracted 99% of the copper, and 86% of the gold was recovered during the last stage of cyanidation.

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Catalytic effect of graphene in bioleaching copper from waste printed circuit boards by Acidithiobacillus ferrooxidans

Cited by 58 publications

References 27 publications

Copper Bioleaching in China: Review and Prospect

Copper Bioleaching in China: Review and Prospect

Recovery of metals in a double-stage continuous bioreactor for acidic bioleaching of printed circuit boards (PCBs)

Combined Mechanical Bio-Hydrometallurgical Recycling Process of Printed Circuit Boards in Brazil

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