Journal
JOURNAL OF ENVIRONMENTAL MANAGEMENT
Volume 250, Issue -, Pages -Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jenvman.2019.109502
Keywords
Bioleaching; Mobile phone PCBs; Penicillium simplicissimum; Non-conventional medium; Metal recovery
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Funding
- Sharif University of Technology in Iran [QA: 970713]
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There is a substantial volume of mobile phone waste every year. Due to the disadvantages of traditional methods, it is necessary to look for biological processes that are more eco-friendly and economical to recover metals from e-waste. Fungi provide large amounts of organic acids and dissolve metals but using sucrose In the medium is not economical. In this paper, the main objective is to find a suitable alternative carbon substrate instead of sucrose for fungi bioleaching of Ni and Cu in printed circuit boards (PCBs) of mobile phones using Penicillium simplicissimum Four kinds of carbon sources (including sucrose, cheese whey, sugar, and sugar cane molasses) were selected. Also, pH and number of spores in inoculum were optimized by response surface methodology (RSM) for all carbon sources. The results showed the simultaneous maximum recovery of Cu and NI is not possible. For Cu recovery, sugar is the best economical and simplistic medium instead of sucrose. Maximum recovery of Cu (90%) gained at the pH of 7, 13 x 10(7) spores, and in sugar. The amount of Ni recovery (89%) was highest in molasses, at the pH of 2, and 10(6) spores. The results proved non-conventional carbon sources improve bioleaching efficiency and the possibility of industrialization.
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