Optimization of Precious Metals Recovery from Electronic Waste by Using Response Surface Methodology (RSM).

An effective recovery technology will be valuable in the future because the concentration of the precious metal contained in the source can be a key driver in recycling technology. This study aims to use response surface methodology (RSM) through Minitab software to discover the optimum oxygen level (mgL), e-waste pulp density (% w/v), and glycine concentration (mgL) for the maximum recovery of gold (Au) and silver (Ag). The method of precious metals recovery used for this study was taken from the bioleaching using 2 L of batch stirred tank reactor (BSTR).