Assessment of heavy metal pollution and human health risk in urban soils of steel industrial city (Anshan), Liaoning, Northeast China
Assessment of heavy metal pollution and human health risk in urban soils of steel industrial city (Anshan), Liaoning, Northeast China
复制标题
辽宁钢铁工业城（鞍山）城市土壤重金属污染及人体健康风险评价
DOI：
10.1016/j.ecoenv.2015.06.019
复制
发表时间：
2015-10-01
影响因子：
6.8
通讯作者：
Lu Shenggao
中科院分区：
文献类型：
--
作者：
Xiao Qing;Zong Yutong;Lu Shenggao
本研究的目的是确定中国钢铁工业区城市土壤中重金属的浓度和健康风险。对来自中国东北辽宁省鞍山市的 115 个表土样品进行了 Cr、Cd、Pb、Zn、Cu 和 Ni 的分析。计算地累积指数（Igeo）、污染指数（PI）和潜在生态风险指数（PER）来评估土壤污染程度。采用危害指数（HI）和致癌风险（RI）评估重金属对人体健康的风险。 Cr、Cd、Pb、Zn、Cu 和 Ni 的平均浓度分别为 69.9、0.86、45.1、213、52.3 和 33.5 mg/kg。重金属的lgeo和PI值由大到小依次为Cd>Zn>Cu>Pb>Ni>Cr。土壤中Cd Igeo值较高表明Cd污染程度为中度。污染指数表明，城市土壤受到Cd、Zn、Cu、Pb中度至重度污染。重金属空间分布图显示，钢铁工业区是污染热点地区。主成分分析 (PCA) 和矩阵聚类分析将重金属分为两类，表明铜、锌、铅和镉的常见工业来源。矩阵聚类分析将采样点分为四组。钢铁工业区内的采样点重金属浓度远高于其他采样点，表明钢铁工业对土壤造成了严重污染。健康风险评估表明，非致癌值低于阈值。儿童和成人的危害指数（HI）由高到低的顺序为Cr>Pb>Cd>Cu>Ni>Zn。城市土壤中Cr、Cd、Ni的致癌风险在成人可接受的范围内。 Cr对儿童的致癌风险值略高于阈值，表明儿童面临轻微的Cr威胁。这些成果为钢铁工业区重金属污染控制和环境管理提供了基础信息。 2015 爱思唯尔公司。保留所有权利。
The purpose of this study was to determine the concentrations and health risk of heavy metals in urban soils from a steel industrial district in China. A total of 115 topsoil samples from Anshan city, Liaoning, Northeast China were collected and analyzed for Cr, Cd, Pb, Zn, Cu, and Ni. The geoaccumulation index (Igeo), pollution index (PI), and potential ecological risk index (PER) were calculated to assess the pollution level in soils. The hazard index (HI) and carcinogenic risk (RI) were used to assess human health risk of heavy metals. The average concentration of Cr, Cd, Pb, Zn, Cu, and Ni were 69.9, 0.86, 45.1, 213, 52.3, and 33.5 mg/kg, respectively. The lgeo and PI values of heavy metals were in the descending order of Cd >Zn>Cu>Pb>Ni>Cr. Higher Igeo value for Cd in soil indicated that Cd pollution was moderate. Pollution index indicated that urban soils were moderate to highly polluted by Cd, Zn, Cu, and Pb. The spatial distribution maps of heavy metals revealed that steel industrial district was the contamination hotspots. Principal component analysis (PCA) and matrix cluster analysis classified heavy metals into two groups, indicating common industrial sources for Cu, Zn, Pb, and Cd. Matrix cluster analysis classified the sampling sites into four groups. Sampling sites within steel industrial district showed much higher concentrations of heavy metals compared to the rest of sampling sites, indicating significant contamination introduced by steel industry on soils. The health risk assessment indicated that non-carcinogenic values were below the threshold values. The hazard index (HI) for children and adult has a descending order of Cr>Pb>Cd>Cu>Ni>Zn. Carcinogenic risks due to Cr, Cd, and Ni in urban soils were within acceptable range for adult. Carcinogenic risk value of Cr for children is slightly higher than the threshold value, indicating that children are facing slight threat of Cr. These results provide basic information of heavy metal pollution control and environment management in steel industrial regions. 2015 Elsevier Inc. All rights reserved.