Enhanced bioleaching efficiency of copper from waste printed circuit board driven by nitrogen-doped carbon nanotubes modified electrode

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

doi:10.1016/j.cej.2017.05.024

Cited by 60 publications

(26 citation statements)

References 22 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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“…Researchers have investigated various strategies to overcome this drawback [8][9][10][11][12][13]. The use of ultrasound has been investigated, although this technique is limited to only tank-type reactors.…”

Section: Introductionmentioning

confidence: 99%

A Review of the Application of Ultrasound in Bioleaching and Insights from Sonication in (Bio)Chemical Processes

Vyas

Ting

2017

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Chemical and biological leaching is practiced on a commercial scale for the mining of metals from ores. Although bioleaching is an environmentally-friendly alternative to chemical leaching, one of the principal shortcomings is the slow rate of leaching which needs to be addressed. The application of ultrasound in bioleaching, termed sonobioleaching, is a technique which has been reported to increase the rate and extent of metal extraction. This article reviews efforts made in the field of sonobioleaching. Since bioleaching is effectively a biological and chemical process, the effects of sonication on chemical leaching/reactions and biological processes are also reviewed. Although sonication increases metal extraction by increasing the metabolite production and enhanced mixing at a micro scale, research is limited in terms of the microorganisms explored. This paper highlights some shortcomings and limitations of existing techniques, and proposes directions for future research.

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“…76.6% of Copper was present in the ground powder of mobile phone printed circuit board which was also confirmed by AAS. Based on the previous findings, mineral content and recovery percentage varies based on the types of PCBs that we use for our studies (Xiang et al, 2010;Gu et al, 2017). In our study, we have got 76.6±9.5 of copper from mg/g PCBs and recovered 68.6% copper with O. Sanctum leaf extract bioleaching process that was conformed with the help of AAS.…”

Section: Determination Of Copper In Mobile Phone Printed Circuit Boarmentioning

confidence: 65%

Reprocess of Copper from Worn Printed Circuit Boards

Swarnambiga¹,

Kalaivani²,

Sathyawathi³

et al. 2019

OnLine Journal of Biological Sciences

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The objective of the study is to reuse printed circuit boards which are mainly made of copper. Most top down and bottom up approaches for the synthesis of Copper nanoparticles (CuNPs) needs pure copper (II) sulfate or any other copper salts as a raw material. For the expensive non-ecofriendly reasons, here we used wasted Printed Circuit Boards (PCBs) as an alternative source of copper and Ocimum Sanctum leaf extract was used as a redox agent. Equally distributed, spherically shaped CuNPs around 14.6-19.7nm size were obtained by this process. Further characterization of synthesized nanoparticles was done with UV-Vis spectrophotometer, AFM, FT-IR, SEM and EDAX. Essential physical parameters like pH, Temperature, Reaction Speed were examined for the CuNPs synthesis optimization process. These CuNPs were reused for assessing dye decolorisation promisingly 70% of dye got decolorized. Based on this study, we conclude that wasted PCBs can be an alternative raw source for CuNPs synthesis and the synthesized nanoparticles can be used for environmental pollution control.

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Enhanced bioleaching efficiency of copper from waste printed circuit board driven by nitrogen-doped carbon nanotubes modified electrode

Cited by 60 publications

References 22 publications

Copper Bioleaching in China: Review and Prospect

Copper Bioleaching in China: Review and Prospect

A Review of the Application of Ultrasound in Bioleaching and Insights from Sonication in (Bio)Chemical Processes

Reprocess of Copper from Worn Printed Circuit Boards

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