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《China Environmental Science》 2013-11
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Migration and emission of heavy metal elements in the multi-resource utilization of high alumina fly ash process

HAN Yong-peng;LI Hui-quan;CHEN Bo;LI Qiang;JIA Xiao-ping;ZHANG Jing-feng;ZHANG Yi;School of Chemical Engineering,Qingdao University of Science and Technology;Key Laboratory of Green Process and Engineering,Institute of Process Engineering,Chinese Academy of Sciences;Inner Mongolia Datang International Renewable Energy Resource Development Co.,Ltd;  
Substance flow analysis was adopted to study the migration behavior and quantitative potential environmental impact of heavy metal elements in multi-resource utilization of high alumina fly ash process. The input, output, and internal migration of heavy metals in this process are obtained. The result showed that 54% of lead was from fly ash, and the other was from industrial raw materials. 64% of lead was brought out through products,and the other through wastes.The environmental emission of this process were from sintering and cement production. The Relative Environment Emission Index(REEI) was defined to compare this process with the Bayer process. The result showed that the lead emission of this process was significantly less than Bayer process and the chromium emission of this process was fair with Bayer process. It meaned that this process could not only utilize the resource of high-alumina fly ash but also significantly reduce the environmental impact of heavy metals in alumina product.
【Fund】: 國家自然科學基金項目(71103172);; 國家“863”項目(2012AA06A117);; 國家科技支撐項目(2011BAC06B13)
【CateGory Index】: X773
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