| 雄安新区西南部土壤重金属污染特征及生态风险评价 |
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| 引用本文： | 张素荣,王昌宇,刘继红,邢怡,刘庆学,杨俊泉,贺福清.雄安新区西南部土壤重金属污染特征及生态风险评价[J].地学前缘,2021,28(4):238-249. |
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| 作者姓名： | 张素荣 王昌宇 刘继红 邢怡 刘庆学 杨俊泉 贺福清 |
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| 作者单位： | 中国地质调查局 天津地质调查中心,天津300170;华北地质科技创新中心,天津300170;河北省地质实验测试中心,河北 保定 071051 |
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| 基金项目： | 中国地质调查局项目“京津冀鲁耕地区土地质量地球化学调查”(DD20160325);“河北张家口地区综合地质调查”(DD20190820) |
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| 摘 要： | 土壤重金属污染具有巨大的生态环境风险和危害。本文以雄安新区西南部(老河头镇、同口镇和芦庄乡)的表层土壤和大宗农作物小麦、玉米为研究对象,在对8种重金属As、Ni、Cu、Cr、Pb、Hg、Cd和Zn含量测试分析的基础上,开展了土壤重金属污染和生态风险评价。结果表明:研究区表层土壤局部存在重金属超标情况,重金属的污染程度依次为:Cd>As>Cu>Zn>Pb>Hg,Cr和Ni土壤环境清洁;研究区表层土壤重金属污染是人为源输入,老河头镇及周边大量有色金属冶炼活动是可能的主要污染源;8种重金属的潜在生态危害程度由强至弱依次为:Cd>Hg>As>Cu>Pb>Zn>Cr>Ni;多金属潜在生态风险指数RI的平均值为252,土壤整体的重金属潜在危害程度为中等风险,其中Cd对潜在生态风险指数RI的贡献最大,且Cd的活性最强,迁移能力强,易被植物吸收。研究成果可为雄安新区的土地利用规划提供重要依据。
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| 关 键 词： | 雄安 土壤 重金属 污染 评价 生态风险 |
| 收稿时间： | 2019-07-24 |
Assessments of heavy metal pollution in soils of the southwestern Xiong’an District and its ecological risk |
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| ZHANG Surong,WANG Changyu,LIU Jihong,XING Yi,LIU Qingxue,YANG Junquan,HE Fuqing.Assessments of heavy metal pollution in soils of the southwestern Xiong’an District and its ecological risk[J].Earth Science Frontiers,2021,28(4):238-249. |
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| Authors: | ZHANG Surong WANG Changyu LIU Jihong XING Yi LIU Qingxue YANG Junquan HE Fuqing |
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| Institution: | 1. Tianjin Center, China Geological Survey, Tianjin 300170, China2. North China Center of Geoscience Innovation, Tianjin 300170, China3. Hebei Research Center for Geoanalysis, Baoding 071051, China |
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| Abstract: | Heavy metal pollution in soil is tremendously hazardous and poses great risks to the ecosystem. In this study, we focus on the topsoils and staple crops, wheat and maize, in southwestern Xiong’an District. We assessed the heavy metal pollution in soil and its ecological risks based on the metal concentration analysis of eight heavy metals, As, Ni, Cu, Cr, Pb, Hg, Cd and Zn. The results show that the concentration of heavy metals in the topsoils of certain areas exceeded the standard value. The degrees of heavy metal pollution were Cd>As>Cu>Zn>Pb>Hg, while Cr and Ni were below the hazardous level for clean soil environment. The heavy metal pollution in topsoils of the area is caused by human activity. Numerous nonferrous metal smelting activities in Laohetou Township and adjacent area might be the major pollutant source. The degrees of potential ecological risk of the eight heavy metals were Cd>Hg>As>Cu>Pb>Zn>Cr>Ni. The average value of polymetallic potential ecological risk index (RI) was 252, indicating an intermediate risk level of overall potential hazard from heavy metals. Among the eight heavy metals, Cd contributed the most to RI, for it has the strongest chemical activity and strong migration ability and is easily absorbed by plants. These results would provide an important basis for the land use planning in Xiong’an District. |
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| Keywords: | Xiong’an soil heavy metals pollution assessment ecological risks |
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