Shi Guitao, Chen Zhenlou, Xu Shiyuan, Zhang Ju, Wang Li, Bi Chunjuan, Teng Jiyan
Key Laboratory of Geographic Information Science of Ministry of Education, East China Normal University, Shanghai 200062, China.
Environ Pollut. 2008 Nov;156(2):251-60. doi: 10.1016/j.envpol.2008.02.027. Epub 2008 Aug 13.
A detailed investigation was conducted to understand the contamination characteristics of a selected set of potentially toxic metals in Shanghai. The amount of Pb, Zn, Cu, Cr, Cd and Ni were determined from 273 soil/dust samples collected within urban area. The results indicated that concentration of all metals except Ni in soils was significant, and metal pollution was even severer in roadside dust. A series of metal spatial distribution maps were created through geostatistical analysis, and the pollution hotspots tended to associate with city core area, major road junctions, and the regions close to industrial zones. In attempt of identifying the source of metals through geostatistical and multivariate statistical analyses, it was concluded as follows: Pb, Zn and Cu mainly originated from traffic contaminants; soil Ni was associated with natural concentration; Cd largely came from point-sourced industrial pollution; and Cr, Ni in dust were mainly related to atmospheric deposition.
开展了一项详细调查，以了解上海一组选定的潜在有毒金属的污染特征。从市区采集的273份土壤/灰尘样本中测定了铅、锌、铜、铬、镉和镍的含量。结果表明，土壤中除镍以外的所有金属浓度都很高，路边灰尘中的金属污染更为严重。通过地统计分析绘制了一系列金属空间分布图，污染热点往往与城市核心区、主要道路交叉口以及靠近工业区的区域相关。通过地统计和多元统计分析试图确定金属来源，得出以下结论：铅、锌和铜主要来自交通污染物；土壤镍与自然浓度有关；镉主要来自点源工业污染；灰尘中的铬、镍主要与大气沉降有关。
