| 安徽省宣城市南部地区土壤重金属元素地球化学特征 |
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| 引用本文： | 邢润华,隋新新.安徽省宣城市南部地区土壤重金属元素地球化学特征[J].岩石矿物学杂志,2022,41(1):185-194. |
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| 作者姓名： | 邢润华 隋新新 |
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| 作者单位： | 安徽省地质调查院;河北地矿局第五地质大队 |
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| 基金项目： | 中国地质调查局项目(DD20160322)。 |
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| 摘 要： | 利用1∶25万土地质量地球化学调查数据分析和研究了安徽省宣城市南部地区土壤中As、Cd、Cr、Cu、Hg、Ni、Pb、Zn 8种重金属元素的地球化学特征以及重金属异常来源。调查发现地质背景是土壤元素含量的主控因素,调查区表、深层土壤重金属元素含量空间分布特征与地质背景、沉积环境表现出显著的空间一致性,重金属高含量成土母岩(荷塘组、皮园村组、蓝田组等地层)是土壤重金属元素高异常的主要影响因素,此外矿山开采、大气干湿沉降也是土壤重金属高异常的影响因素之一,土壤中Pb、Hg、Cd、Cr元素具有大气干湿沉降的输入来源。调查区土壤重金属污染风险主要影响指标为Cd,土壤Cd超过农用地土壤污染风险管制值的样品比例为2.56%,形态分析结果显示土壤Cd以离子交换态为主,结合农作物调查发现在土壤Cd高异常区存在一定的生态风险。
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| 关 键 词： | 土壤 重金属元素 地球化学分布特征 异常来源分析 宣城南部地区 |
| 收稿时间： | 2021/7/6 0:00:00 |
Geochemical characteristics of the heavy metals in soil, the south of Xuancheng, Anhui Province |
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| XING Run-hu,SUI Xin-xin.Geochemical characteristics of the heavy metals in soil, the south of Xuancheng, Anhui Province[J].Acta Petrologica Et Mineralogica,2022,41(1):185-194. |
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| Authors: | XING Run-hu SUI Xin-xin |
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| Institution: | (Geological Survey of Anhui Province,Hefei 230001,China;The Fifth Geological Brigade of Hebei Bureau of Geology and Mineral Resources,Tangshan 063000,China) |
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| Abstract: | The geochemical characteristics and abnormal sources of As,Cd,Cr,Cu,Hg,Ni,Pb and Zn in the soil of Southern Xuancheng were analyzed and studied by using the 1∶250000 land quality geochemical survey data.It is found that the geological background is the main controlling factor for the content of soil elements,and that the spatial distribution characteristics of heavy metal elements in the surface and deep soil in the area are significantly consistent with the geological background and sedimentary environment.The high content of heavy metal in the soil parent rock geological background(Hetang Formation,Piyuancun Formation and Lantian Formation,etc)is the main influencing factor for the high anomaly of soil heavy metal elements.In addition,mining and atmospheric dry and wet deposition are also one of the factors affecting high anomaly of heavy metals in soil.It is found that Pb,Hg,Cd and Cr in soil have input sources of atmospheric dry and wet deposition.The main impact index of heavy metal in soil pollution risk in the survey areas was Cd.The proportion of samples that soil Cd exceeded the control value of soil pollution risk of agricultural land was 2.56%.The morphological analysis results show that soil Cd is mainly in ion-exchange state.Combined with crops investigation,it is found that there is a certain ecological risk in the area with high abnormal soil Cd. |
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| Keywords: | soil heavy metal elements geochemical distribution characteristics abnormal source analysis Southern Xuancheng |
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