RESEARCH ARTICLE

Investigation of Cu leaching from municipal solid waste incinerator bottom ash with a comprehensive approach

  • Jun YAO 1 ,
  • Wenbing LI 1 ,
  • Fangfang XIA 1 ,
  • Jing WANG 1 ,
  • Chengran FANG 2 ,
  • Dongsheng SHEN , 3
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  • 1. Department of Environmental Engineering, Zhejiang University, Hangzhou 310029, China
  • 2. School of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou 310023, China
  • 3. Department of Environmental Engineering, Zhejiang University, Hangzhou 310029, China; College of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China

Received date: 08 Jun 2010

Accepted date: 08 Oct 2010

Published date: 05 Sep 2011

Copyright

2014 Higher Education Press and Springer-Verlag Berlin Heidelberg

Abstract

Municipal solid waste incinerator (MSWI) bottom ash is often reused as a secondary construction material. This study used a comprehensive approach to characterize the leaching behavior of copper (Cu) from the MSWI bottom ash. The batch titration procedure was used to determine the acid neutralizing capacity and Cu leaching as a function of pH. The sequential extraction procedure (SEP) was adopted to analyze the speciation of Cu in the MSWI bottom ash. The metal speciation equilibrium model for surface and ground water (Visual MINTEQ) was used to evaluate the equilibrium of the leachates with the relative minerals, and to determine the speciation of the aqueous Cu in the leachates. Based on the multi-analysis of the results, Cu would be significantly released from the MSWI bottom ash when it is acidic. The Cu leaching pattern was not only affected by dissolved organic carbon, it was also limited by its speciation in the MSWI bottom ash. Furthermore, almost 100% of the aqueous Cu in the leachate was bound to organic matter in basic and neutral conditions, but mostly existed as Cu2+ in an acidic condition. These findings provide an important insight into predicting the leaching behavior of Cu from the MSWI bottom ash, as well as its impact on the environment.

Cite this article

Jun YAO , Wenbing LI , Fangfang XIA , Jing WANG , Chengran FANG , Dongsheng SHEN . Investigation of Cu leaching from municipal solid waste incinerator bottom ash with a comprehensive approach[J]. Frontiers in Energy, 2011 , 5(3) : 340 -348 . DOI: 10.1007/s11708-010-0131-9

Acknowledgements

This work was financially supported by the Innovative Research Team in Higher Educational Institutions of Zhejiang Province (No. T200912) and Significant Science and Technology Project of Zhejiang Province (Nos. 2008C13024-2, 2009C03007-1 and No. 2009C03007-2).
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