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| Assessment and partition threshold for heavy metals pollution in soil of facility farmland |
| Received:April 24, 2020 |
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| KeyWord:facility farmland;heavy metal;comprehensive evaluation;target value;screening value |
| Author Name | Affiliation | E-mail | | CAO Zhi-qiang | Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China | | | WEI Bing-gan | Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China | | | YU Jiang-ping | Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China | | | MENG Min | Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China | | | LI Hai-rong | Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China | | | YANG Lin-sheng | Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China | yangls@igsnrr.ac.cn | | YIN Shu-hui | Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China | | | LI Feng | Tianjin Institute of Agriculture Resources and Environmental Science, Tianjin 300192, China | | | ZHANG Guo-yin | Institute of Agricultural Resources and Environment, Hebei Academy of Agriculture and Forestry Research, Shijiazhuang 050051, China | | | CHEN Qing | College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China | |
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| Abstract: |
| Intensive cultivation patterns of facility farmlands increase the accumulation of heavy metals in soils. The determination of locally-adapted target and screening values of soil heavy metals is important for the sustainable production of facility farmland. Using the soil samples from facility farmlands in Shijiazhuang, Hengshui, and Tangshan, the entropy weight method was adopted to comprehensively evaluate the risk level of heavy metals pollution based on the pollution risk and ecological risk assessment of soil heavy metals. Then, the partition threshold of facility soil heavy metals pollution was determined. The results showed that Cd, Cu, and Zn posed the highest risks in facility farmland soil, with high-risk areas accounting for 40.57% of the land. The target values of the total and available states of Cd, Cu, Pb, and Zn in facility farmland soil in the study area were 0.12, 40.17, 19.23, and 116.03 mg·kg-1 and 0.02, 4.19, 0.59, and 8.80 mg·kg-1, respectively; the screening values were 0.40, 90.27, 38.33, and 170.68 mg·kg-1 and 0.11, 11.77, 1.55, and 14.24 mg·kg-1, respectively. The method established in this study to estimate the partition threshold based on comprehensive evaluation results is simple and convenient. Moreover, the determination of target values and screening values of the total and available state of heavy metals can provide multidirectional guidance for the prevention of heavy metals pollution in facility farmland. |
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