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Chiang Mai Journal of Science, Faculty of Science, Chiang Mai University
 


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Purification of polycarbonate from aluminum by acid leaching for recycling waste compact discs


Paper Type 
Contributed Paper
Title 
Purification of polycarbonate from aluminum by acid leaching for recycling waste compact discs
Author 
Cui Li, Hui Wang*, Yingshuang Zhang*
Email 
huiwang1968@163.com ; 18742487986@163.com
Abstract:
Waste management receives increasing attention due to social and environmental pressures. This work deals with recycling waste compact discs (WCDs), and acid leaching was employed for purification of polycarbonate in WCDs from aluminum. The influence of temperature, concentration, leaching time, liquid–solid ratio, agitation and particle size on leaching of aluminum were investigated to optimize experimental parameters. Under the optimized conditions of temperature 50 °C, leaching time 5 h, liquid–solid ratio 10:1, acid concentration 2.5 mol L–1, agitation speed of 400 r min–1, and particle size 2–3mm, the leaching yield of aluminum was up to 86.72 %. The kinetic mechanism was examined to get a better understanding of leaching process. The leaching process was controlled by product layer diffusion model, and the activation energy was calculated to be 15.01 kJ mol–1. A reliable, environmentally friendly and cost–effective process was proposed for recycling WCDs, and economic analysis confirms economic feasibility of the process. This study provides technical insights into recycling of solid wastes.
Start & End Page 
693 - 702
Received Date 
2018-11-07
Revised Date 
Accepted Date 
2019-02-25
Full Text 
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Keyword 
acid leaching, compact discs, kinetics, polycarbonate, recycling
Volume 
Vol.46 No.4 (July 2019)
DOI 
Citation 
Li C., Wang* H. and Zhang* Y., Purification of polycarbonate from aluminum by acid leaching for recycling waste compact discs, Chiang Mai Journal of Science, 2019; 46(4): 693-702.
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