The study of metal contamination in urban soils of Hong Kong using a GIS-based approach
The study of metal contamination in urban soils of Hong Kong using a GIS-based approach
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DOI：
10.1016/j.envpol.2003.09.030
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发表时间：
2004-05-01
影响因子：
8.9
通讯作者：
Thornton, L
中科院分区：
文献类型：
--
作者：
Li, XD;Lee, SL;Thornton, L
研究城市土壤金属污染的区域变化和人为污染对城市环境规划和监测具有重要意义。在香港高度城市化的九龙地区（46.9 km（2））进行了广泛的调查，采用了系统的采样策略，采样密度为每km（2）3-5个复合土壤样品（0-15 cm）。基于地理信息系统（GIS）技术，从强酸性提取的表层土壤中的“总”金属（镉，铬，铜，镍，铅和锌）的地球化学图。基于GIS的分析结果表明，九龙区土壤中Ni、Cu、Pb和Zn的空间分布具有明显的相关性，表明九龙区土壤中这些金属污染物具有共同的来源。从复合金属地球化学图中确定了几个金属污染的热点区域，主要是在老工业区和居民区。进一步的地理信息系统分析表明，道路交叉口，主要道路和工业建筑物的城市土壤中的重金属的可能来源。污染土壤的铅同位素组成显示出明显的人为来源。(C)2003爱思唯尔有限公司。保留所有权利。
The study of regional variations and the anthropogenic contamination by metals of soils is very important for environmental planning and monitoring in urban areas. An extensive survey was conducted in the highly urbanized Kowloon area (46.9 km(2)) Of Hong Kong, using a systematic sampling strategy with a sampling density of 3-5 composite soil samples (0-15 cm) per km(2). Geochemical maps of 'total' metals (Cd, Cr, Cu, Ni, Pb and Zn) from strong acid extraction in the surface soils were produced based on geographical information system (GIS) technology. A significant spatial relationship was found for Ni, Cu, Pb and Zn in the soils using a GIS-based analysis, suggesting that these metal contaminants in the soils of the Kowloon area had common sources. Several hot-spot areas of metal contamination were identified from the composite metal geochemical map, mainly in the old industrial and residential areas. A further GIS analysis revealed that road junctions, major roads and industrial buildings were possible sources of heavy metals in the urban soils. The Pb isotope composition of the contaminated soils showed clear anthropogenic origins. (C) 2003 Elsevier Ltd. All rights reserved.