| 李国成,周墨,申月芳,曹阳,马婵娟.天津市某地区农用地表层土壤重金属污染评价及含量预测分析[J].矿产勘查,2025,16(3):565-573 |
| 天津市某地区农用地表层土壤重金属污染评价及含量预测分析 |
| Pollution assessment and prediction analysis of heavy metals in agricultural surface soil in a certain area of Tianjin |
| 投稿时间：2024-04-28 |
| DOI：10.20008/j.kckc.202503013 |
| 中文关键词: 耕地土壤 重金属 污染评价 预测分析 天津市 |
| 英文关键词: farmland soil heavy metals pollution assessment predictive analysis Tianjin City |
| 基金项目:本文受天津市规划和自然资源局科技项目(ML2019-HP-F162)资助。 |
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| 摘要点击次数: 11 |
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| 中文摘要: |
| 土壤重金属污染会危害生态环境，也会威胁到人体健康。通过土壤重金属生态风险评价和人体健康风险评价，能够明确土壤重金属的危害程度。通过土壤重金属含量预测分析，能够掌握土壤重金属的变化趋势。本文基于污染指数法、地累积指数法、内梅罗综合污染指数法，探究天津市近郊某地区土壤重金属的污染特征、农作物重金属积累状况。利用箱式预测模型，分析土壤重金属含量变化趋势，为土壤重金属污染防治和管控工作提供科学依据。结果表明:研究区土壤重金属含量元素高于土壤背景值，说明 Cd、Hg、As、Pb、Cr共 5种重金属都有不同程度的累积；研究区农作物中重金属元素 Hg和 Cr在白菜、芹菜、南瓜等作物中存在超标现象，土壤污染与农作物重金属累积具有直接关系；研究区土壤 Cd元素的增长速度较高，以研究区整体估测，Cd再过 52年达到《土壤环境质量农用地土壤污染风险管控标准(试行)》(GB 15618-2018)筛选值。因此本研究在提前制定土壤修复或管控措施，避免耕地退化，保障农业生产的可持续性等方面具有非常重要的意义。 |
| 英文摘要: |
| Soil heavy metal contamination constitutes a substantial threat to both ecological systems and hu-man health. Ecological risk assessment and human health risk evaluation of soil heavy metals can clarify their haz-ard levels, while predictive analysis of soil heavy metal content helps track their changing trends. This investigationexamines the contamination characteristics of heavy metals in soil and their bioaccumulation in crops within a sub-urban area of Tianjin, using the Pollution Index Method, Geo-accumulation Index Method, and Nemerow Compre-hensive Pollution Index Method. By utilizing a box prediction model, the study analyzes the temporal variations insoil heavy metal concentrations, thereby providing a scientific foundation for pollution prevention and control strate-gies. The results indicate that the heavy metal content in the study area′s soil exceeds the background value, withCd, Hg, As, Pb, and Cr accumulating to varying degrees. In crops like Chinese cabbage, celery, and pumpkin, Hgand Cr levels surpass standards, directly linking soil pollution to heavy metal accumulation in crops.The growth rateof Cd in the soil is particularly pronounced, with projections indicating that it will reach the screening value stipu-lated in the "Soil Environmental Quality Risk Control Standard for Soil Contamination of Agricultural Land" (GB15618-2018) within 52 years. This study highlights the urgency of implementing preemptive soil remediation orcontrol measures to prevent irreversible farmland degradation and ensure sustainable agricultural production. |
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