| 某城市规划新区表层土壤重金属潜在生态风险评价 |
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| 引用本文： | 何军,裴来政,李定远,雷天赐,徐宏林,李朋.某城市规划新区表层土壤重金属潜在生态风险评价[J].华南地质与矿产,2019,35(4):457-462. |
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| 作者姓名： | 何军 裴来政 李定远 雷天赐 徐宏林 李朋 |
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| 作者单位： | 中国地质调查局武汉地质调查中心,武汉,430205;湖北省地质调查院,武汉,430034 |
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| 摘 要： | 为评价某城市规划新区表层土壤质量,利用网格法采集表层土样1000件,分析8种重金属(Cd、 Cu、 Zn、 Ni、Cr、Pb、Hg、As)元素的含量,并分别运用污染负荷指数(PLI)和潜在生态危害指数(RI)评价研究区表层土壤中重金属的污染程度和危害等级。利用克里金插值法研究土壤PLI和RI的空间分布特征。结果表明:研究区内表层土壤重金属平均值均大于中国土壤背景值,Cd、Cu、Ni较为富集。研究区Cd和Cu元素为重度污染,Cd的生态危害性较强,87.90%的土样为重金属轻微污染,60.83%的土样为中等生态危害。污染较为严重和风险较强的地区主要位于研究区西南部河流两岸,Cu和Cd可能受到了人类活动的影响而偏高。
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| 关 键 词： | 规划新区 表层土壤 重金属 潜在生态风险 |
Potential Ecological Risk Assessment of Heavy Metals in Surface Soil of a New Planning Urban Districts |
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| HE Jun,PEI Lai-Zheng,LI Ding-Yuan,LEI Tian-Ci,XU Hong-Lin,LI Peng.Potential Ecological Risk Assessment of Heavy Metals in Surface Soil of a New Planning Urban Districts[J].Geology and Mineral Resources of South China,2019,35(4):457-462. |
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| Authors: | HE Jun PEI Lai-Zheng LI Ding-Yuan LEI Tian-Ci XU Hong-Lin LI Peng |
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| Institution: | (Wuhan Center of China Geological Survey(Central South China Innovation Center for Geosciences),Wuhan 430205,Hubei,China;Hubei Geological Survey,Wuhan 430034,Hubei,China) |
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| Abstract: | 1000 surface soil samples were collected by grid method and the contents of 8 heavy metals(Cd,Cu, Zn, Ni, Cr, Pb, Hg, As) were analyzed to evaluate the surface soil quality of a new planning urban districts. The soil pollution states and the rank of potential ecological hazards of heavy metals were evaluated with pollution load index and potential ecological risk index. The spatial distribution characteristics of PLI and RI in surface soil were interpolated by Kriging. The results showed that the average content of heavy metals in surface soil was higher than background value in China, and Cd, Cu and Ni were enriched. The Cd and Cu elements in the study area were heavily polluted, and the ecological hazard of Cd was strong. 87.90% of the soil samples were slightly polluted by heavy metals, 60.83% was moderately ecologically harmful. The areas with more serious pollution and higher risks are mainly located on the banks of the southwestern part of the study area. Cu and Cd content may be affected by human activities. |
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| Keywords: | New planning urban district surface soil heavy metals potential ecological risk |
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