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| Pollution characteristics and source analysis of heavy metals in farmland soils around the e-waste dismantling sites in Taizhou City, China |
| Received:December 01, 2021 |
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| KeyWord:farmland soil;e-waste;heavy metal;spatial distribution;source apportionment;risk assessment |
| Author Name | Affiliation | E-mail | | ZHENG Yuna | State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China | | | LIU Peng | State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China | | | LIU Jinhe | State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China | | | ZHOU Changrui | State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China | | | WANG Qi | State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China | | | FENG Meiyun | State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China | | | LIU Guanhong | State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China | | | ZHU Xudong | State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China | | | LIN Kuangfei | State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China | kflin@ecust.edu.cn |
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| Abstract: |
| In order to analyze the pollution characteristics and source contributions of heavy metals in farmland soils around the e-waste dismantling sites in Taizhou City, 230 surface (0~20 cm) farmland soils in the study area were collected in March 2021. The contents of heavy metals (Cr, Co, Ni, Cu, Zn, As, Cd, Hg, and Pb) in these soils were determined. The ecological risks of the heavy metals were analyzed using the pollution load index (PLI) and potential ecological risk index (RI). Moreover, the sources of the soil heavy metals in this area were analyzed using the combination of geostatistics, multivariate statistics and PMF modelling. The results showed that the Cd pollution levels of farmland soils around the study area were the highest, the median exceeded the risk screening values for soil contamination of agricultural land, and the exceeding standard rate reached 75.65%. In addition, the exceeding standard rates of Cr and Cu were relatively high, 27.39% and 42.61% respectively. The comprehensive pollution load index indicated that 16.96% and 7.39% of the samples constituted moderate or serious pollution, respectively. Nevertheless, the potential risk indices (55.22% and 34.78%) of the samples were considered moderate and above severe risk, respectively. The comprehensive results of geostatistics, multivariate statistics and PMF modelling showed that the sources of nine heavy metals in these soil samples could be divided into four categories:Co, Cr, and Ni mainly come from natural sources; As mainly comes from agricultural sources; Zn, Cu, Cd, and Pb mainly come from metal smelting sources, concentrating in the farmland soils around historical e-waste dismantling sites; and Hg mainly comes from coal and industrial sources. |
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