摘要
为了解长江中游南岸某工业园区表层土壤的重金属污染状况,在园区共采集33组表层土壤样,通过测定土壤中As、Hg、Cu、Pb、Cd、Ni等6种重金属元素的含量,采用ArcGIS的空间插值分析法、相关性分析法、主成分分析法及正定因子矩阵分析法研究土壤中的6种重金属元素的空间分布特征和来源,采用地累积指数法和潜在生态风险指数法评估土壤污染状况和生态风险。研究结果表明,(1)6种重金属元素含量平均值均高于园区企业投产前土壤重金属元素含量背景值,但低于土壤污染风险筛选值;(2)重金属含量整体上为西北部高,向东南部呈递减趋势;(3)样品地累积指数整体上较低,大部分样品无污染或轻污染,仅个别地区达到中—重污染,污染程度依次为Cd>As>Pb>Ni>Cu>Hg;(4)综合潜在生态风险指数为82.69~585.41,平均为157.07,整体上处于中度生态风险。
In order to understand the heavy metal pollution status of the surface soil of an industrial park on the south bank of the middle reaches of the Yangtze River, a total of 33 surface soil samples were collected in the park.The spatial distribution characteristics and sources of the six metal elements such as As, Hg, Cu, Pb, Cd, Ni in the soil were studied by ArcGIS spatial interpolation analysis method, correlation analysis, principal component analysis, positive definite matrix factor model, the geo-accumulation index method and potential ecological environment risk index method were used to evaluate the soil pollution and ecological risk of the park.The results showed as follows:(1) six heavy metals in the park were higher than the background values of the park, but still lower than the screening values of soil pollution risk.(2) Heavy metals in the park were high in the northwest and decreased to the southeast.(3) The cumulative index of the samples was low on the whole.Most of the samples were pollution-free or lightly polluted, and only some of the samples were medium-heavy polluted.The order of pollution degree was Cd>As>Pb>Ni>Cu>Hg.(4) The comprehensive potential ecological hazard index of the industrial park ranged from 82.69 to 585.41,with an average of 157.07,indicating that the industrial park was at a moderate ecological risk.
作者
何身焱
刘波
王水华
李红梅
虞昊哲
高佩
He Shenyan;Liu Bo;Wang Shuihua;Li Hongmei;Yu Haoze;Gao Pei(Hubei Institute of Hydrogeology and Engineering Geology,Jingzhou,Hubei 434020)
出处
《资源环境与工程》
2022年第6期787-794,共8页
Resources Environment & Engineering
基金
湖北省地质局2021年生态环境地质专项——长江经济带荆州沿岸工业园区水土环境调查与风险评价(PJin-20210603)。
关键词
长江中游南岸
工业园区
土壤重金属污染
空间分布
地累积指数
潜在生态风险
south bank of the middle reaches of the Yangtze River
industral park
heavy metals pollution
spatial distribution
index of geo-accumulation
potential ecological risk
