|About this Abstract
||Part C-1: Hydrometallurgy 2018
||Kinetics Study and Application of Box-Behnken Design to Investigate Leaching of Copper from Waste Printed Circuit Boards Using Alkaline Glycine-Peroxide Solution
||Rohn Kenneth Serapio, Terence Lucero Menor
|On-Site Speaker (Planned)
||Rohn Kenneth Serapio
Recycling of waste printed circuit boards (WPCBs) becomes progressively appealing due to its recoverable valuable metals. However, most of the process applied today are economically and environmentally unsatisfactory. Thus, the purpose of this research is to attest the potential of glycine, an inexpensive and eco-friendly amino acid, as an alternative lixiviant of copper from WPCBs. Leaching experiments with 16% pulp density at 400rpm were conducted. Box-Behken design was employed as experimental design. From the results, it was found out that glycine can effectively leach Cu from WPCBs. Maximum extraction of 32% Cu was achieved at 3.7:1 Cu-to-glycine molar ratio, pH 10.26, 0.6%(v/v) H2O2 and ambient temperature. At 45°C, dissolution further reached 46% using the same combination of parameter settings. Cu extraction was also observed to increase exponentially with time. The rate-determining step was found to be product layer diffusion and the activation energy of the process was estimated at 3041.36cal/mol.
||Planned: At-meeting proceedings