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

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, liq...

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Main Authors: Cui Li, Hui Wang, Yingshuang Zhang
Language:English
Published: Science Faculty of Chiang Mai University 2019
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Online Access:http://it.science.cmu.ac.th/ejournal/dl.php?journal_id=10231
http://cmuir.cmu.ac.th/jspui/handle/6653943832/66044
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spelling th-cmuir.6653943832-660442019-08-21T09:18:20Z Purification of polycarbonate from aluminum by acid leaching for recycling waste compact discs Cui Li, Hui Wang Yingshuang Zhang acid leaching compact discs kinetics polycarbonate recycling 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 2019-08-21T09:18:20Z 2019-08-21T09:18:20Z 2019 Chiang Mai Journal of Science 46, 4 (July 2019), 693 - 702 0125-2526 http://it.science.cmu.ac.th/ejournal/dl.php?journal_id=10231 http://cmuir.cmu.ac.th/jspui/handle/6653943832/66044 Eng Science Faculty of Chiang Mai University
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
language English
topic acid leaching
compact discs
kinetics
polycarbonate
recycling
spellingShingle acid leaching
compact discs
kinetics
polycarbonate
recycling
Cui Li, Hui Wang
Yingshuang Zhang
Purification of polycarbonate from aluminum by acid leaching for recycling waste compact discs
description 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
author Cui Li, Hui Wang
Yingshuang Zhang
author_facet Cui Li, Hui Wang
Yingshuang Zhang
author_sort Cui Li, Hui Wang
title Purification of polycarbonate from aluminum by acid leaching for recycling waste compact discs
title_short Purification of polycarbonate from aluminum by acid leaching for recycling waste compact discs
title_full Purification of polycarbonate from aluminum by acid leaching for recycling waste compact discs
title_fullStr Purification of polycarbonate from aluminum by acid leaching for recycling waste compact discs
title_full_unstemmed Purification of polycarbonate from aluminum by acid leaching for recycling waste compact discs
title_sort purification of polycarbonate from aluminum by acid leaching for recycling waste compact discs
publisher Science Faculty of Chiang Mai University
publishDate 2019
url http://it.science.cmu.ac.th/ejournal/dl.php?journal_id=10231
http://cmuir.cmu.ac.th/jspui/handle/6653943832/66044
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