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Title: A novel process for separation of hazardous poly(vinyl chloride) from mixed plastic wastes by froth flotation

Abstract

Highlights: • A novel method was proposed for separation of PVC by froth flotation. • Calcium hypochlorite treatment improves selectively surface wettablity. • Mechanism of surface treatment was examined by SEM, FTIR and XPS. •Binary plastics with different particle sizes were separated effectively. • Separation of PVC from mixed plastic wastes was obtained. - Abstract: A novel method, calcium hypochlorite (CHC) treatment, was proposed for separation of hazardous poly(vinyl chloride) (PVC) plastic from mixed plastic wastes (MPWs) by froth flotation. Flotation behavior of single plastic indicates that PVC can be separated from poly(ethylene terephthalate) (PET), poly(acrylonitrile-co-butadiene-co-styrene) (ABS), polystyrene (PS), polycarbonate (PC) and poly(methyl methacrylate) (PMMA) by froth flotation combined with CHC treatment. Mechanism of CHC treatment was examined by contact angle measurement, scanning electron microscopy, Fourier transform infrared and X-ray photoelectron spectroscopy. Under the optimum conditions, separation of PVC from binary plastics with different particle sizes is achieved efficiently. The purity of PC, ABS, PMMA, PS and PET is greater than 96.8%, 98.5%, 98.8%, 97.4% and 96.3%, respectively. Separation of PVC from multi-plastics was further conducted by two-stage flotation. PVC can be separated efficiently from MPWs with residue content of 0.37%. Additionally, reusing CHC solution is practical. This work indicatesmore » that separation of hazardous PVC from MPWs is effective by froth flotation.« less

Authors:
; ; ; ; ;
Publication Date:
OSTI Identifier:
22742163
Resource Type:
Journal Article
Journal Name:
Waste Management
Additional Journal Information:
Journal Volume: 69; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0956-053X
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; FLOTATION; FOURIER TRANSFORMATION; PARTICLE SIZE; POSITRON COMPUTED TOMOGRAPHY; PVC; SCANNING ELECTRON MICROSCOPY; WASTES; X-RAY PHOTOELECTRON SPECTROSCOPY

Citation Formats

Wang, Jianchao, Wang, Hui, Wang, Chongqing, Zhang, Lingling, Wang, Tao, and Zheng, Long. A novel process for separation of hazardous poly(vinyl chloride) from mixed plastic wastes by froth flotation. United States: N. p., 2017. Web. doi:10.1016/J.WASMAN.2017.07.049.
Wang, Jianchao, Wang, Hui, Wang, Chongqing, Zhang, Lingling, Wang, Tao, & Zheng, Long. A novel process for separation of hazardous poly(vinyl chloride) from mixed plastic wastes by froth flotation. United States. doi:10.1016/J.WASMAN.2017.07.049.
Wang, Jianchao, Wang, Hui, Wang, Chongqing, Zhang, Lingling, Wang, Tao, and Zheng, Long. Wed . "A novel process for separation of hazardous poly(vinyl chloride) from mixed plastic wastes by froth flotation". United States. doi:10.1016/J.WASMAN.2017.07.049.
@article{osti_22742163,
title = {A novel process for separation of hazardous poly(vinyl chloride) from mixed plastic wastes by froth flotation},
author = {Wang, Jianchao and Wang, Hui and Wang, Chongqing and Zhang, Lingling and Wang, Tao and Zheng, Long},
abstractNote = {Highlights: • A novel method was proposed for separation of PVC by froth flotation. • Calcium hypochlorite treatment improves selectively surface wettablity. • Mechanism of surface treatment was examined by SEM, FTIR and XPS. •Binary plastics with different particle sizes were separated effectively. • Separation of PVC from mixed plastic wastes was obtained. - Abstract: A novel method, calcium hypochlorite (CHC) treatment, was proposed for separation of hazardous poly(vinyl chloride) (PVC) plastic from mixed plastic wastes (MPWs) by froth flotation. Flotation behavior of single plastic indicates that PVC can be separated from poly(ethylene terephthalate) (PET), poly(acrylonitrile-co-butadiene-co-styrene) (ABS), polystyrene (PS), polycarbonate (PC) and poly(methyl methacrylate) (PMMA) by froth flotation combined with CHC treatment. Mechanism of CHC treatment was examined by contact angle measurement, scanning electron microscopy, Fourier transform infrared and X-ray photoelectron spectroscopy. Under the optimum conditions, separation of PVC from binary plastics with different particle sizes is achieved efficiently. The purity of PC, ABS, PMMA, PS and PET is greater than 96.8%, 98.5%, 98.8%, 97.4% and 96.3%, respectively. Separation of PVC from multi-plastics was further conducted by two-stage flotation. PVC can be separated efficiently from MPWs with residue content of 0.37%. Additionally, reusing CHC solution is practical. This work indicates that separation of hazardous PVC from MPWs is effective by froth flotation.},
doi = {10.1016/J.WASMAN.2017.07.049},
journal = {Waste Management},
issn = {0956-053X},
number = ,
volume = 69,
place = {United States},
year = {2017},
month = {11}
}