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Title: Activated recovery of PVC from contaminated waste extension cord-cable using a weak acid
Authors: Jia, Chunmiao
Das, Pallab
Zeng, Qiang
Gabriel, Jean-Christophe P.
Tay, Chor Yong
Lee, Jong-Min
Keywords: Engineering::Chemical engineering
Issue Date: 2022
Source: Jia, C., Das, P., Zeng, Q., Gabriel, J. P., Tay, C. Y. & Lee, J. (2022). Activated recovery of PVC from contaminated waste extension cord-cable using a weak acid. Chemosphere, 303(Pt 1), 134878-.
Project: USS-IF-2018-4 
Journal: Chemosphere 
Abstract: Waste electronic and electrical equipment are complex mixtures of valuable and/or toxic materials, which pose serious challenges in their recycling or disposal, for example, electrical transmission wires insulated in polyvinyl chloride materials. These materials are frequently found contaminated with toxic chemical elements, such as Pb, Hg, Cr, or Cd, and are discarded without decontamination. To resolve this problem, we developed a microwave-assisted extraction process to remove toxic metals from plastic e-waste. We processed diluted (30 wt%) citric acid at 210 °C for 1 h inside a pressurized vessel heated by microwave, and found it was suitable not only for the extraction of the toxic metals (∼100%) but also for a significant plastic recovery (>50 wt%). To predict an optimized process window, the support vector regression machine learning algorithm was applied, which reduced the amount of experimentation required while still giving accurate results. Conditions optimized for the reference sample also led to maximum extraction of toxic metals from real-life extension cord waste. We also report that the recovered plastic's properties remained intact after the extraction.
ISSN: 0045-6535
DOI: 10.1016/j.chemosphere.2022.134878
Schools: School of Materials Science and Engineering 
School of Chemical and Biomedical Engineering 
Research Centres: Energy Research Institute @ NTU (ERI@N) 
Rights: © 2022 Elsevier Ltd. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:ERI@N Journal Articles
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