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Waste Manag Res

Title:		The effect of additives on migration and transformation of gaseous pollutants in the vacuum pyrolysis process of waste printed circuit boards
Author(s):		Xie Y; Sun S; Liu J; Lin W; Chen N; Ye M;
Address:		"1 School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, China. 2 Guangdong Petrol-chemical Technology School, Foshan, P.R. China. 3 Guangdong Polytechnic of Environmental Protection Engineering, Foshan, P.R. China. 4 Key Laboratory of Comprehensive Utilization of Resources and Cleaner Production, Department of Education of Guangdong Province, Guangzhou, P.R. China"
Journal Title:		Waste Manag Res
Year:		2017
Volume:		20160820
Issue:		2
Page Number:		190 - 199
DOI:		10.1177/0734242X16662331
ISSN/ISBN:		1096-3669 (Electronic)
Abstract:		"The effect of six additives (CaCO(3), HZSM-5, CaO, Al(2)O(3), FeOOH and Ca(OH)(2)) on the generation, migration, transformation and escaping behaviours of typical gaseous pollutants in the pyrolysis process were studied by vacuum pyrolysis experiments on epoxy resin powder from waste printed circuit boards with tube furnace. The results show that the additives Al(2)O(3), CaO, Ca(OH) (2) and FeOOH could reduce the yield of the gas phase. The removal rates of pollutants, such as benzene, toluene, ethyl benzene, phenol, p-xylene, HBr, NO(2) and SO(2) in the gaseous products, has changed variously with the increasing percentage of the above additives. Judging from the control of gas-phase pollutant discharge, the calcium-base additives are superior to the others. Ca(OH)(2) has the best inhibition effect among them. The increase of the pyrolysis temperature and vacuum degree enhanced the volatility of organic pollutants and weakened the Ca(OH)(2) inhibition effect on organic pollutants, while it improved the removal rate of SO(2). Under the condition of 500 degrees C pyrolysis temperature and 0.09 MPa vacuum degree, when the additive proportion of Ca(OH)(2) was one-fifth, the average removal rate of pollutants in gas phase is up to 66.4%"
Keywords:		Aluminum Oxide/chemistry Calcium Carbonate/chemistry Calcium Compounds/chemistry *Electronic Waste Environmental Pollutants/analysis/*chemistry Gas Chromatography-Mass Spectrometry Gases Oxides/chemistry *Refuse Disposal Temperature Vacuum Waste Managemen;
Notes:		"MedlineXie, Yibiao Sun, Shuiyu Liu, Jingyong Lin, Weixiong Chen, Nanwei Ye, Maoyou eng England 2016/08/20 Waste Manag Res. 2017 Feb; 35(2):190-199. doi: 10.1177/0734242X16662331. Epub 2016 Aug 20"