Simultaneous leaching of Cu, Al, and Ni from computer printed circuit boards using Penicillium simplicissimum

摘要: A short lifespan and increased consumption patterns make e-waste the world's fastest-growing waste stream. Computers are one of the most significant parts of e-waste. Recycling of e-waste has been introduced as the main solution to deal with environmental problems and to save natural mines. This research aims to investigate the bioleaching of Cu, Ni, and Al from computer printed circuit boards (CPCBs) using Penicillium simplicissimum. The adaptation phase began at 1 g/l CPCBs powder with 107 spores and final pulp density was reached at 30 g/l. The most effective parameters including pulp density, initial pH, and the sucrose concentration were optimized to achieve maximum simultaneous leaching efficiency of Cu, Ni, and Al. The results showed the main mechanism of Al and Ni leaching was acidolysis, while complexoysis was the main mechanism for leaching of Cu. The optimal conditions of 60 g/l …