| 阚炜杰,徐明泽,左强,王金凤,田硕.北京市昌平区农田土壤重金属健康风险评估及来源解析[J].农业环境科学学报,2025,44(5):1294-1302. |
| 北京市昌平区农田土壤重金属健康风险评估及来源解析 |
| Health risk assessment and source analysis of heavy metals in farmland soil in Changping District, Beijing |
| 投稿时间：2024-05-13 |
| DOI：10.11654/jaes.2024-0404 |
| 中文关键词: 农田土壤 重金属 环境质量评价 生态风险评估 |
| 英文关键词: farmland soil heavy metal environmental quality assessment ecological risk assessment |
| 基金项目:国家重点研发计划项目（2022YFD1700703） |
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| 摘要点击次数: 151 |
| 全文下载次数: 213 |
| 中文摘要: |
| 为构建地区土壤环境质量监测网络，提升土壤质量监管能力，突破农业健康发展的瓶颈约束，把控农田污染影响，推动农业绿色可持续发展，本研究于2018—2022年对北京市昌平区64个采样点采集土壤表层样本320份，监测土壤中8种重金属元素（Cd、Hg、As、Pb、Cr、Cu、Ni、Zn）含量。采用单因子指数（Pi）法、内梅罗综合指数（P）法以及潜在生态风险指数（RI）法对区域内土壤环境质量进行评价，并结合UNMIX溯源模型解析研究区土壤重金属来源。结果显示：研究区重金属潜在生态风险低，但个别重金属存在富集现象，Hg、Cr、Zn的平均含量达到地区背景值的2.4、1.9、1.7倍；研究区重金属来源主要有工业源、母质源、农业源以及交通源，各部分整体占比分别为40%、39%、10%和11%；Cd与Cu、Zn这3类重金属元素在来源、迁移途径中可能存在协同作用。研究表明，不合理的农业活动和大流量的交通运输活动影响了研究区重金属富集特征。 |
| 英文摘要: |
| 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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