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| Health risk assessment and source analysis of heavy metals in farmland soil in Changping District, Beijing |
| Received:May 13, 2024 |
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| KeyWord:farmland soil;heavy metal;environmental quality assessment;ecological risk assessment |
| Author Name | Affiliation | E-mail | | KAN Weijie | Changping District Agricultural Environment Monitoring Station of Beijing Municipality, Beijing 102200, China | | | XU Mingze | Changping District Agricultural Environment Monitoring Station of Beijing Municipality, Beijing 102200, China | | | ZUO Qiang | Institute of Plant Nutrition and Resource Environment, Beijing Academy of Agriculture and Forestry, Beijing 100097, China | ZQ18189@163.com | | WANG Jinfeng | Changping District Agricultural Environment Monitoring Station of Beijing Municipality, Beijing 102200, China | | | TIAN Shuo | Changping District Agricultural Environment Monitoring Station of Beijing Municipality, Beijing 102200, China | 269713205@qq.com |
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| Abstract: |
| To build a regional soil environment quality monitoring network, enhance soil quality supervision capabilities, break through the bottleneck constraints of healthy agricultural development, control the impact of farmland pollution, and promote green and sustainable agricultural development. Over the period from 2018 to 2022, we collected 320 soil surface samples from 64 locations within Changping District, Beijing. These samples were analyzed for the presence of eight heavy metal elements：Cd, Hg, As, Pb, Cr, Cu, Ni, and Zn. Meanwhile, we combine several methods to evaluate soil quality in the region. Additionally, we use the UNMIX model to identify the sources of soil heavy metal contamination in the study area. Our findings revealed the following results：While the potential ecological risk of heavy metals in the study area was low, there was a significant issue of heavy metal enrichment. The average concentrations of Hg, Cr, and Zn were found to be 2.4, 1.9, and 1.7 times higher than the regional background values, respectively. The sources of pollution in the study area were primarily industrial（40%）, natural background materials（39%）, agricultural gardens（10%）, and transportation（11%）. Cd, Cu, and Zn, three types of heavy metal elements in the source, migration pathway may exist in the phenomenon of compound pollution. Unregulated agricultural practices and high-traffic transportation activities were identified as factors exacerbating heavy metal pollution in the study area. |
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