Sources of heavy metal pollution in agricultural soils of a rapidly industrializing area in the Yangtze Delta of China.
Sources of heavy metal pollution in agricultural soils of a rapidly industrializing area in the Yangtze Delta of China.
复制标题
DOI：
10.1016/j.ecoenv.2014.07.001
复制
发表时间：
2014-10
影响因子：
6.8
通讯作者：
Xiang-hua Xu;Yongcun Zhao;Xiaoyan Zhao;Yudong Wang;W. Deng
中科院分区：
文献类型：
--
作者：
Xiang-hua Xu;Yongcun Zhao;Xiaoyan Zhao;Yudong Wang;W. Deng
发展中国家的快速工业化和城市化增加了重金属污染，这是对人类健康和环境的一个关切。以嘉兴市农业区为研究对象，采集了230个表层土壤样品（0-20 cm），并对土壤理化性质进行了研究。采用序贯高斯模拟法（SGS）和多元因子克里格分析法（FKA）对8种重金属（Cu、Zn、Pb、Cr、Ni、Cd、Hg和As）的污染源进行了识别和探讨。Cu、Zn、Pb、Cr、Ni和Cd的局部污染热点面积百分比分别为0.48%、0.58%、2.84%、2.41%、0.74%和0.68%。汞污染的地区约占38%，而没有发现砷的潜在污染风险。土壤成土母质和点污染源对Cr、Ni、Cu、Zn和Cd含量有显著影响，除农业管理措施的影响外，Cu和Zn污染的微尺度变化（块金效应）也有一定的影响。短距离（4公里）扩散过程有显着的影响，铜水平，虽然他们没有出现锌和镉的变化的主要来源。短期扩散污染所产生的当前和历史的工业排放和城市化，和远程（33公里）的变化，在土壤母质和/或扩散共同决定了目前的土壤铅浓度。汞污染风险的来源可能是工业排放物的大气沉降和含汞农药的历史使用。
The rapid industrialization and urbanization in developing countries have increased pollution by heavy metals, which is a concern for human health and the environment. In this study, 230 surface soil samples (0–20 cm) were collected from agricultural areas of Jiaxing, a rapidly industrializing area in the Yangtze Delta of China. Sequential Gaussian simulation (SGS) and multivariate factorial kriging analysis (FKA) were used to identify and explore the sources of heavy metal pollution for eight metals (Cu, Zn, Pb, Cr, Ni, Cd, Hg and As). Localized hot-spots of pollution were identified for Cu, Zn, Pb, Cr, Ni and Cd with area percentages of 0.48 percent, 0.58 percent, 2.84 percent, 2.41 percent, 0.74 percent, and 0.68 percent, respectively. The areas with Hg pollution covered approximately 38 percent whereas no potential pollution risk was found for As. The soil parent material and point sources of pollution had significant influences on Cr, Ni, Cu, Zn and Cd levels, except for the influence of agricultural management practices also accounted for micro-scale variations (nugget effect) for Cu and Zn pollution. Short-range (4 km) diffusion processes had a significant influence on Cu levels, although they did not appear to be the dominant sources of Zn and Cd variation. The short-range diffusion pollution arising from current and historic industrial emissions and urbanization, and long-range (33 km) variations in soil parent materials and/or diffusion jointly determined the current concentrations of soil Pb. The sources of Hg pollution risk may be attributed to the atmosphere deposition of industrial emission and historical use of Hg-containing pesticides.