Isolation and identification of Penicillium chrysogenum strain Y5 and its copper extraction characterization from waste printed circuit boards

Xia, M, Bao, P, Liu, J, Zhang, S, Peng, T, Shen, L, Yu, R, Wu, X, Li, J, Liu, Y, Chen, M, Qiu, G and Zeng, W 2018, 'Isolation and identification of Penicillium chrysogenum strain Y5 and its copper extraction characterization from waste printed circuit boards', Journal of Bioscience and Bioengineering, vol. 126, no. 1, pp. 78-87.


Document type: Journal Article
Collection: Journal Articles

Title Isolation and identification of Penicillium chrysogenum strain Y5 and its copper extraction characterization from waste printed circuit boards
Author(s) Xia, M
Bao, P
Liu, J
Zhang, S
Peng, T
Shen, L
Yu, R
Wu, X
Li, J
Liu, Y
Chen, M
Qiu, G
Zeng, W
Year 2018
Journal name Journal of Bioscience and Bioengineering
Volume number 126
Issue number 1
Start page 78
End page 87
Total pages 10
Publisher Elsevier
Abstract Biohydrometallurgy is generally considered as a green technology for the recycling of industrial solid waste. In this study, an indigenous fungal strain named Y5 with the ability of high-yielding organic acids was isolated and applied in bioleaching of waste printed circuit boards (PCBs). The strain Y5 was identified as Penicillium chrysogenum by morphological and molecular identification. Meanwhile, we investigated that an optimal set of culturing conditions for the fungal growth and acids secretion was 15 g/L glucose with initial pH 5.0, temperature 25°C and shaking speed 120 rpm in shaken flasks culture. Moreover, three bioleaching processes such as one-step, two-step and spent medium processes were conducted to extract copper from waste PCBs. Spent medium bioleaching showed higher copper extraction percentage and it was 47% under 5%(w/v) pulp density. Transmission electron microscope (TEM) observation combining with energy dispersive analysis of X-rays (EDAX) showed that the leached metal ions did not obviously damage the hypha cells. All above results indicated that P. chrysogenum strain Y5 has the tolerance to metal ions, suggesting its potential in recycling of metals from waste PCBs in industry.
Subject Hydrometallurgy
Keyword(s) Bioleaching processes
Parameter optimization
Penicillium chrysogenum
Transmission electron microscope
Waste printed circuit boards
DOI - identifier 10.1016/j.jbiosc.2018.02.001
Copyright notice © 2018 The Society for Biotechnology, Japan. All rights reserved.
ISSN 1389-1723
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