Optimizing mixed culture of two acidophiles to improve copper recovery from printed circuit boards (PCBs)

Liang, Guoxi; Tang, Jianghong; Liu, Weiping; Zhou, Quanfa

doi:10.1016/j.jhazmat.2013.01.077

Cited by 93 publications

(39 citation statements)

References 40 publications

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“…High oxidation activity of strains was screened to bioleach the PCBs (Bas et al 2013;Nie et al 2015). Mixed culture whose performance was better than that of single bacteria was used (Jiang et al 2017;Liang et al 2013). The tolerance of bacteria could be improved by acclimatization of bacteria to the condition of PCBs (Arshadi and Mousavi 2014).…”

Section: Introductionmentioning

confidence: 99%

Bioleaching of copper from waste printed circuit boards by bacteria-free cultural supernatant of iron–sulfur-oxidizing bacteria

Liu

Zhang

et al. 2018

Bioresour. Bioprocess.

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Background:The toxicity of waste printed circuit boards (PCBs) to bacteria was considered as the major limitation in bioleaching of copper from PCBs. To reduce the toxicity of PCBs, copper extraction from PCBs was investigated using bacteria-free cultural supernatant from some metallurgical microbial consortium, whose predominant organisms were Leptospirillum ferriphilum and Sulfobacillus thermosulfidooxidans.

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Section: Introductionmentioning

confidence: 99%

Bioleaching of copper from waste printed circuit boards by bacteria-free cultural supernatant of iron–sulfur-oxidizing bacteria

Liu

Zhang

et al. 2018

Bioresour. Bioprocess.

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“…Response surface methodology is the methodology that has advantages on optimizing the process and its parameters for maximal efficiency of product formation, evaluating the In order to recover more metals from waste PCBs, response surface methodology was also utilized to optimize initial pH, S 0 , and Fe 2? , which led to more PCBs addition amounts and copper extraction but with reduced FeSO 4 Á7H 2 O amounts in the bioleaching process [33]. Though many studies were conducted to enhance metal leaching rate, the bioleaching process was hindered by the reddish brown precipitate [16].…”

Section: Discussionmentioning

confidence: 99%

Bioleaching of copper from metal concentrates of waste printed circuit boards by a newly isolated Acidithiobacillus ferrooxidans strain Z1

Yang

Zhu

Shen

et al. 2015

J Mater Cycles Waste Manag

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The goal of this study is to determine the potential of Acidithiobacillus ferrooxidans strain Z1 in bioleaching of metal concentrates of waste printed circuit boards (PCBs). The influences of initial pH, initial Fe(II) concentration, metal concentrates dosage, inoculation quantity and particle size on the bioleaching process were investigated and optimum conditions were determined. The results showed that 92.57 % copper leaching efficiency was achieved within 78 h in a two-step process, and 85.24 % aluminum and 95.18 % zinc were leached out after 183 h under the optimum conditions of initial pH 2.25, initial Fe(II) 9 g/L, metal concentrates dosage 12 g/L, inoculation quantity 10 % and particle size 0.178-0.250 mm. It demonstrated that metals could be efficiently leached from metal concentrates by Acidithiobacillus ferrooxidans Z1 and the bioleaching period was reduced 81-78 h. Therefore, the strain Acidithiobacillus ferrooxidans Z1 could be suggested as a potential strain to bioleach metals from metal concentrates of waste PCBs.

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“…and Sulfobacillus thermosulfidooxidans. Different species can also be used at the same time through a cooperative interaction that promotes mutual benefits [59,64,79].…”

Section: Department Of Chemical Engineering Polytechnic School Univmentioning

confidence: 99%

“…Acidithiobacillus thiooxidans and Acidithiobacillus ferrooxidans [79] Chromobacterium violaceum, Pseudomonas fluorescens and Bacillus megaterium [91] PCB for cell phones…”

Section: ]mentioning

confidence: 99%

Leaching Processes

Calgaro¹,

Tanabe²,

Bertuol³

et al. 2015

Electronic Waste

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When solid materials are exposed to a liquid, some constituents will dissolve to a greater or lesser extent. The degree of dissolution of individual constituents by the contacting liquid leads to a leachate/percolate or extract composition that can be of interest for different purposes [1], such as the extraction of metals from solid waste through a suitable leachant. Leaching is a step in hydro-and electrometallurgical processes and has been also employed for the recovery of metals from waste of electrical and electronic equipment (WEEE). The process may be preceded by a mechanical pretreatment of the waste (see Chap. 6) and followed by purification and metal recovery from the solution (see Chaps. 8 and 9). This chapter will discuss the different leaching solutions and conditions for WEEE processing.

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Optimizing mixed culture of two acidophiles to improve copper recovery from printed circuit boards (PCBs)

Cited by 93 publications

References 40 publications

Bioleaching of copper from waste printed circuit boards by bacteria-free cultural supernatant of iron–sulfur-oxidizing bacteria

Bioleaching of copper from waste printed circuit boards by bacteria-free cultural supernatant of iron–sulfur-oxidizing bacteria

Bioleaching of copper from metal concentrates of waste printed circuit boards by a newly isolated Acidithiobacillus ferrooxidans strain Z1

Leaching Processes

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