Leaching toxicity characteristics of municipal solid waste incineration bottom ash  

作　　者：Khamphe PHOUNGTHONG Yi XIA Hua ZHANG Liming SHAO Pinjing HE 

机构地区：[1]State Key Laboratory of Pollution Control & Resource Reuse, Tongji University, Shanghai 200092, China [2]Institute of Waste Treatment and Reclamation, Tongji Universily, Shanghai 200092, China [3]Centre for the Technology Research and Training on Household Waste in Small Towns & Rural Area, Ministry of Housing and Urban-RuralDevelopment of PR China (MOHURD), Shanghai 200092, China

出　　处：《Frontiers of Environmental Science & Engineering》2016年第2期399-411,共13页环境科学与工程前沿（英文）

基　　金：The authors gratefully acknowledge the financial supports from the National Basic Research Program of China （No. 2011CB201500）, the National Social Science Fund of China （No. 12＆ZD236）, the National Natural Science Foundation of China （Grant No. 21277096）, and the Collaborative Innovation Center for Regional Environ- mental Quality.

摘　　要：The continuously increasing production of municipal solid waste incineration bottom ash （MSWIBA） has promoted its utilization as construction material and raised environmental concern. The physico-chemical properties and leaching behavior of MSWIBA were studied, and ecotoxicological testing using a luminescent bacterium bioassay was performed to assess the ecological pollution risks associated with its leached constituents. The MSWIBA was leached by two types of leachants, H2SO4/HNO3 and HAc solution, at different liquid to solid ratios and contact times. The concentrations of heavy metals and anions in the leachates were analyzed. Multi- variate statistical analyses, including principle component analysis, Pearson＇s correlation analysis and hierarchical cluster analysis, were used to evaluate the contributions of the constituents to the toxicity （ECso） of the MSWIBA leachate. The statistical analyses of the ecotoxicological results showed that the Ba, Cr, Cu, Pb, F and total organic carbon （TOC） concentrations were closely correlated with the ECso value, and these substances were the main contributors to the ecotoxicity of the MSWIBA leachate. In addition, the cluster of these variables indicated similar leaching behaviors. Overall, the research demonstrated that the ecotoxicological risks resulting from MSWIBA leaching could be assessed before its utilization, which provides crucial information for the adaptation of MSWIBA as alternative materials.The continuously increasing production of municipal solid waste incineration bottom ash （MSWIBA） has promoted its utilization as construction material and raised environmental concern. The physico-chemical properties and leaching behavior of MSWIBA were studied, and ecotoxicological testing using a luminescent bacterium bioassay was performed to assess the ecological pollution risks associated with its leached constituents. The MSWIBA was leached by two types of leachants, H2SO4/HNO3 and HAc solution, at different liquid to solid ratios and contact times. The concentrations of heavy metals and anions in the leachates were analyzed. Multi- variate statistical analyses, including principle component analysis, Pearson＇s correlation analysis and hierarchical cluster analysis, were used to evaluate the contributions of the constituents to the toxicity （ECso） of the MSWIBA leachate. The statistical analyses of the ecotoxicological results showed that the Ba, Cr, Cu, Pb, F and total organic carbon （TOC） concentrations were closely correlated with the ECso value, and these substances were the main contributors to the ecotoxicity of the MSWIBA leachate. In addition, the cluster of these variables indicated similar leaching behaviors. Overall, the research demonstrated that the ecotoxicological risks resulting from MSWIBA leaching could be assessed before its utilization, which provides crucial information for the adaptation of MSWIBA as alternative materials.

关 键 词：Municipal solid waste incineration bottomash alternative material leaching tests TOXICITY Vibrio qinghaiensis （Q67） 

分 类 号：X703[环境科学与工程—环境工程] X705