Technical Analysis of Multi-stage Chemical Leaching of Waste Printed Circuit Board Recycling Technology and its Application in the Philippines
Author : Yncierto, Marella Alexis Yanson
Major Adviser : Guerrero, Gino Apollo M.
Committee Members : Eusebio, Ramon Christian P.; Nisola, Vic Jayson M.
Year : 2020
Month : July
Type : Thesis
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Waste printed circuit boards (WPCBs) is one of the by-products of the increasing e-waste generation and with its significant metals content and complex structure, appropriate recycling methods are studied that will give a cost-effective, and environmentally friendly recovery methods of metals. Currently, the most effective recycling technology is hydrometallurgy. However, most studies are only focusing on the recovery of one type of metal. This study will attempt to comprehensively review studies on multi-stage leaching on the hydrometallurgical methods of recovery of metals from WPCBs, evaluate the processes to bring about the method that would best address the challenges and serve as a background for the improvement of this technology and discuss its possible application for industrial recycling of WPCBs here in the Philippines through strength, weaknesses, opportunities and threat (SWOT) analysis. It was determined that studies on multi-stage leaching have a general format of the methods: (1) pre-treatment, (2) base metal multi- stage leaching, (3) precious metal multi-stage leaching, and (4) recovery. It is also important that optimum parameters are set to have the highest metal extraction possible during leaching. With the current technology, policies, and understanding of e-waste recycling the country has, this type of technology has potential but will require large amounts of work for it to be fully developed and adapted.
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