Correlation analysis between concentrations of heavy metal species and organic carbon in dustfall with different particle size
HUO Ting-ting1, DONG Fa-qin1, LIU Meng-qing1, JIANG Lu-man1, LUO Zhao-pei1, LI Dong-kun1, DENG Yue-quan2, HE Xiao-chun2
1. School of Environment and Resource, Southwest University of Science and Technology, Mianyang 621010, China;
2. School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
In order to evaluate the correlations between concentrations of heavy metal species and organic carbon in dustfall, dust samples were collected in Yuncheng city, Shanxi province, and then they were separated into three particle sizes. In this study, the chemical species of As, Pb, Cd, Cr, total organic carbon (TOC) and water-soluble organic carbon (WSOC) were measured, and their correlations were analyzed. In addition, enrichment factors of heavy metals and their bioavailability were determined. Results showed that the total metal concentrations decreased in the following order:As > Cr > Pb > Cd, and the accumulation of all heavy metals increased with increasing particle size, while little difference was found in the chemical species of heavy metals among different particle sizes. The concentrations of WSOC and TOC in dust decreased with the decreases of particle size. The concentrations of TOC and WSOC in dust showed good correlations with some chemical species of Pb, Cd and Cr but a poor correlation with As. The enrichment factor (EF) of heavy metals decreased as follows:Cd > As > Pb > Cr, where Cr and As were relatively stable with little ecological risk, while Pb and Cd exhibited potential health risks. There were significant differences in the behavior of organic compounds and heavy metals, as well as the environmental risks of dust particles in different particle sizes from diverse sources.
霍婷婷, 董发勤, 刘孟清, 蒋璐蔓, 罗昭培, 李冬坤, 邓跃全, 贺小春. 不同粒段降尘重金属赋存与有机碳关联性分析[J]. 中国环境科学, 2020, 40(1): 52-62.
HUO Ting-ting, DONG Fa-qin, LIU Meng-qing, JIANG Lu-man, LUO Zhao-pei, LI Dong-kun, DENG Yue-quan, HE Xiao-chun. Correlation analysis between concentrations of heavy metal species and organic carbon in dustfall with different particle size. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(1): 52-62.
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