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2 results on '"shredded PCB"'

1. Microbial Processing of Waste Shredded PCBs for Copper Extraction Cum Separation—Comparing the Efficacy of Bacterial and Fungal Leaching Kinetics and Yields

Author

Abhilash, Shirin Tabassum, Anirban Ghosh, Pratima Meshram, and Eric D. van Hullebusch

Subjects
shredded PCB, copper, microbial leaching, solvent extraction, copper product, Mining engineering. Metallurgy, TN1-997
Abstract

The recycling of electronic scrap is an important subject not only from an environmental aspect but also for recovering metal resources such as copper. In this work, the microbial extraction of copper and other metals (Cu, Ni, Co, Fe and Al) present in the depopulated and shredded printed circuit board (PCB) is elaborated. Bacterial strains of A. ferrooxidans, A. thiooxidans and a fungal strain, A. niger are used for copper extraction along with other metals from shredded PCBs. An optimum metal recovery of 93% Cu was obtained at 308 K, pH 2 using 8% pulp density in 10 days by a mixed culture of A. ferrooxidans and A. thiooxidans. Whereas using A. niger, a metal recovery of 66% Cu was reported using similar experimental conditions. The results show the higher potential ability of bacteria as compared to fungus to bioleach copper. Additionally, the kinetics and mechanism of copper bioleaching from this e-waste by the chemolithotrophs and heterotrophs were evaluated. The leach liquor obtained from the optimized leaching process was subjected to separation and purification of copper as >99% pure copper sulfate using Acorga M5640 by solvent extraction.

Published
2021
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2. Microbial Processing of Waste Shredded PCBs for Copper Extraction Cum Separation—Comparing the Efficacy of Bacterial and Fungal Leaching Kinetics and Yields

Author

Eric D. van Hullebusch, Abhilash, Pratima Meshram, Anirban Ghosh, and Shirin Tabassum

Subjects
lcsh:TN1-997, 0211 other engineering and technologies, chemistry.chemical_element, microbial leaching, 02 engineering and technology, 010501 environmental sciences, engineering.material, 01 natural sciences, Metal, Copper extraction techniques, Bioleaching, General Materials Science, lcsh:Mining engineering. Metallurgy, 021102 mining & metallurgy, 0105 earth and related environmental sciences, copper product, Hydrometallurgy, Chemistry, Pulp (paper), Extraction (chemistry), Metals and Alloys, Pulp and paper industry, Copper, solvent extraction, shredded PCB, visual_art, copper, visual_art.visual_art_medium, engineering, Leaching (metallurgy)
Abstract

The recycling of electronic scrap is an important subject not only from an environmental aspect but also for recovering metal resources such as copper. In this work, the microbial extraction of copper and other metals (Cu, Ni, Co, Fe and Al) present in the depopulated and shredded printed circuit board (PCB) is elaborated. Bacterial strains of A. ferrooxidans, A. thiooxidans and a fungal strain, A. niger are used for copper extraction along with other metals from shredded PCBs. An optimum metal recovery of 93% Cu was obtained at 308 K, pH 2 using 8% pulp density in 10 days by a mixed culture of A. ferrooxidans and A. thiooxidans. Whereas using A. niger, a metal recovery of 66% Cu was reported using similar experimental conditions. The results show the higher potential ability of bacteria as compared to fungus to bioleach copper. Additionally, the kinetics and mechanism of copper bioleaching from this e-waste by the chemolithotrophs and heterotrophs were evaluated. The leach liquor obtained from the optimized leaching process was subjected to separation and purification of copper as &gt, 99% pure copper sulfate using Acorga M5640 by solvent extraction.

Published
2021

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