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| Influence factor analysis of heavy metal pollution in large-scale soil based on the geographical detector |
| Received:May 14, 2019 |
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| KeyWord:geographical detector;soil heavy metal;influencing factor;interaction |
| Author Name | Affiliation | E-mail | | QI Xing-xing | College of Information Engineering, Capital Normal University, Beijing 100048, China | | | GAO Bing-bo | National Engineering Research Center for Information Technology in Agriculture, Beijing 100097, China
College of Land Science and Technology, China Agricultural University, Beijing 100083, China | gaobb@nercita.org.cn | | PAN Yu-chun | College of Information Engineering, Capital Normal University, Beijing 100048, China
National Engineering Research Center for Information Technology in Agriculture, Beijing 100097, China
Key Laboratory of Agri-informatics, Ministry of Agriculture and Rural Affairs, Beijing 100097, China | | | YANG Jing | National Engineering Research Center for Information Technology in Agriculture, Beijing 100097, China
Key Laboratory of Agri-informatics, Ministry of Agriculture and Rural Affairs, Beijing 100097, China | | | GAO Yun-bing | National Engineering Research Center for Information Technology in Agriculture, Beijing 100097, China
Key Laboratory of Agri-informatics, Ministry of Agriculture and Rural Affairs, Beijing 100097, China | |
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| Abstract: |
| The accumulation and factors influencing soil heavy metal content including Cd, Pb, Zn, As, Cu, and Cr were quantitatively analyzed. By descriptive statistics and geoaccumulation index method, the status and cumulative distribution of heavy metals in soil were revealed, and their main influencing factors were quantitatively measured using geographic detectors. Cd pollutes a large area; Pb, Zn, and Cu pollute a small area; and As and Cr only present scattered pollution. The influencing factors detected are that Cd pollution is related to the administrative division, elevation, terrain, and soil type; Pb pollution is related to terrain, climate type, and soil type; Zn pollution is related to elevation, administrative division, climate type; As pollution is related to climate type and soil type; Cu pollution is related to elevation, climate type, and soil type; and Cr pollution is related to soil type, economic division, and administrative division. The content of six heavy metals in soils are mainly controlled by natural factors and are influenced by multiple combined factors. Quantitative analysis of the factors influencing the heavy metal content in soil reveals the overall trend and macrolaw at the national scale. |
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