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| PCDD/Fs levels and heavy metal characteristics in soils surrounding typical municipal waste incineration plants in the Chengdu area |
| LI Ying-hua1, YANG Zhao-xu1, BO Xin2, TIAN Fei3, JIA Yu-ling4, SHI Meng-xue5, LU Yong6, LIAO Jia-ling4, WANG Peng7 |
1. School of Resources and Environmental Engineering, Jilin Institute of Chemical Technology, Jilin 132022, China;
2. Appraisal Center for Environment and Engineering, Ministry of Ecology and Environment, Beijing 100012, China;
3. Shandong Academy of Environmental Science Co., Ltd., Jinan 250013, China;
4. Sichuan Environment and Engineering Appraisal Center, Chengdu 610041, China;
5. School of Atmospheric Physics, Nanjing University of Information Science&Technology, Nanjing 210044, China;
6. CSD IDEA(Beijing) Environmental Test&Analysis Co., Ltd., Beijing 100027, China;
7. School of Mathematics and Physics, Beijing University of Chemical Technology, Beijing 100029, China |
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Abstract In order to understand the source and distribution characteristics of dioxin and heavy metals in surface soils around the municipal solid waste incineration plant, three waste incineration plants in the Chengdu area were selected as research objects, 17kinds of Polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) and 11heavy metals in the surrounding soil were monitored. The concentrations range of 0.25~0.75ng I-TEQ/kg for PCDD/Fs and 0.23~580.57mg/kg for heavy metals in the soil samples were determined, respectively. The contribution rate of toxic equivalent concentration of Polychlorinated dibenzofuran(PCDFs) in the soil around the three waste incineration plants was above Polychlorinated dibenzodioxins (PCDDs), the average contribution rate of PCDFs to toxic equivalent concentration reached 55%;Cd, Hg, Pb, Cu and Zn in soil samples had good correlations among each other. Hg, Pb and Zn had good correlations with some PCDFs. The correlation coefficients (r) were 0.792, 0.760 and 0.788, and the corresponding p values were 0.034, 0.047 and 0.035respectively. Therefore Hg, Pb and Zn were classified as the same cluster, which can be used as heavy metal tracers to characterize the source of PCDFs.
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Received: 19 July 2019
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