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引用本文:王昌宇,张素荣,刘继红,邢怡,李名则,刘庆学. 雄安新区某金属冶炼区土壤重金属污染程度及风险评价[J]. 中国地质, 2021, 48(6): 1697-1709.
WANG Changyu,ZHANG Surong,LIU Jihong,XING Yi,LI Mingze,LIU Qingxue. Pollution level and risk assessment of heavy metals in a metal smelting area of Xiong'an New District[J]. Geology in China, 2021, 48(6): 1697-1709(in Chinese with English abstract).
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雄安新区某金属冶炼区土壤重金属污染程度及风险评价
王昌宇1,2, 张素荣1,2, 刘继红1,2, 邢怡1,2, 李名则3, 刘庆学4
1.中国地质调查局天津地质调查中心, 天津 300170;2.华北地质科技创新中心, 天津 300170;3.四川省地质调查院, 四川 成都 610081;4.河北省地质实验测试中心, 河北 保定 071000
摘要:
为支撑雄安新区土地资源科学管理,完善中国土壤污染评价体系,文章以雄安新区某废旧金属冶炼区为研究区开展地质调查,采集541件表层土壤样品,测定了土壤中的Cd、Hg、Pb、As、Cu、Zn、Cr、Ni八种重金属元素的含量和pH,采用主成分分析法研究重金属元素的组合及分布特征,通过单因子指数法、内梅罗综合指数法、地质累积指数法、潜在生态风险评价法和人体健康风险评价法对土壤重金属的污染程度及风险进行评价。结果显示:研究区土壤中Cu、Zn、Cd、Pb元素超标主要受冶炼活动影响,As、Hg元素高值异常主要由受唐河污染的地下水灌溉引起;单因子污染指数超标比例大小顺序为Cd>As>Cu>Zn>Pb>Hg>Cr=Ni;内梅罗综合指数评价结果显示54%的样品达到了污染水平;地质累积指数超标比例大小为Cd>Cu>Pb>As>Zn>Hg>Ni>Cr,Cu、Cd、Zn、Pb、As极重污染比例分别为13.5%、10.2%、9.1%、10.9%、17.2%;Cd和Hg是主要的生态危害元素,Cd中等-强生态危害比例为65.2%,Hg中等-强生态危害比例为71.3%;非致癌风险因子主要为As、Cr、Pb,95.2%样品对儿童的非致癌风险超过了1,29件样品中As对儿童的致癌风险超过10-4,研究区土壤重金属对儿童具有较高的健康风险。
关键词:  雄安新区  地质调查工程  重金属  污染程度  风险评价
DOI:10.12029/gc20210603
分类号:P595;X142
基金项目:中国地质调查局项目(DD20160325,DD20189122)资助。
Pollution level and risk assessment of heavy metals in a metal smelting area of Xiong'an New District
WANG Changyu1,2, ZHANG Surong1,2, LIU Jihong1,2, XING Yi1,2, LI Mingze3, LIU Qingxue4
1.Tianjin Centre, China Geological Survey, Tianjin 300170, China;2.North China Center for Geoscience Innovation, Tianjin 300170, China;3.Sichuan Geological Survey, Chengdu 610081, Sichuan, China;4.Hebei Research Center for Geoanalysis, Baoding 071000, Hebei, China
Abstract:
In order to support the scientific management of land resource in Xiong'an New District and improve the assessment system of soil pollution in China, a metal smelting area in the District was selected to conduct geological survey. Total 541 surface soil samples collected from the smelting area were analysed for the concentrations of eight heavy metal elements of Cd, Hg, Pb, As, Cu, Zn, Cr, Ni and pH values. The principal component analysis method was used to study the combination and distribution characteristics of the heavy metals. The methods of the single pollution index, Nemerow synthesis pollution index, geological accumulation index and potential ecological hazard index and health risk assessment model were adopted to evaluate the degree and risk of heavy metals pollution in soil. The results show that the excessive concentrations of Cu, Zn, Cd, Pb in soil of the area are mainly influenced by smelting activity, the high value anomalies of As and Pb are principally caused by irrigation of the polluted groundwater from Tanghe River. The order of over-standard rate of the single pollution indices of the elements is Cd>As> Cu>Zn>Pb>Hg>Cr=Ni. The assessment results by the Nemerow synthetic pollution index method show that fifty-four percent of the samples reaches the pollution standard. The order of over-standard rate of the geological accumulation indices is Cd>Cu>Pb>As>Zn>Hg>Ni>Cr, of which the extremely heavy pollution ratios for the elements of Cu, Cd, Zn, Pb and As are 13.5%, 10.2%, 9.1%, 10.9% and 17.2%, respectively. Cd and Hg are the major ecological risk elements. The ratio of moderate-considerable potential ecological risk of Cd is 65.2%, and that of Hg is 71.3%. As, Cr and Pb are of major non-carcinogenic factors. There are 95.2% of the samples (As, Cr, Pb) with non-carcinogenic risk index over 1, and 29 samples with carcinogenic index of As over 10-4 to children, indicating that heavy metals in the soil of study area have a relatively high health risk to children.
Key words:  Xiong'an New District  geological survey engineering  heavy metals  pollution level  risk assessment