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首页> 外文期刊>Applied Geochemistry: Journal of the International Association of Geochemistry and Cosmochemistry >Spatial distributions and sources of heavy metals in sediment from public park in Shanghai, the Yangtze River Delta
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Spatial distributions and sources of heavy metals in sediment from public park in Shanghai, the Yangtze River Delta

机译：长江三角洲上海某公园沉积物中重金属的空间分布及来源

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摘要

As one of the largest and most modern cities in China, Shanghai has experienced rapid urban expansion over the last three decades, which may cause environmental pollution. This study collected the surface sediments from 35 lakes in public parks in different areas of Shanghai and explored the relationship between heavy metals (HM; Co, Cr, Ni, Cd, Cu, Pb, and Zn) distribution and city urbanization factors. The concentrations of Co, Cr, and Ni in sediment were similar to those in background soil of shanghai, whereas the levels of Cd, Cu, Pb, and Zn were elevated. Overall, sediments from the central urban core area (CUC; inside the inner-ring highway) contained significantly higher levels of Cd, Cu, Pb, and Zn than those from the developed urban area (DDU; between the inner- and middle-ring highway), the developing urban area (DIU; between the middle- and outer-ring highway), and the suburban area (SU; outside the outer-ring highway), suggesting potentially large contributions from point sources related to human activities in the highly urbanized regions. For Co, Cr, and Ni, no significant differences of concentration and enrichment were found among different areas. The levels of Cd, Cu, Pb, and Zn showed strong associations with density of road network (R~2 > 0.84) in six urban administration districts of Shanghai, quantitatively confirming that these four metals mainly originated from traffic emission. However, the percent of residential and industrial lands had no correlation with HM (Cd, Cu, Pb, and Zn) concentrations in sediment from Shanghai.
机译：作为中国最大，最现代化的城市之一，上海在过去的三十年中经历了快速的城市扩张，这可能会造成环境污染。这项研究收集了上海不同地区公园中35个湖泊的地表沉积物，并探讨了重金属（HM; Co，Cr，Ni，Cd，Cu，Pb和Zn）分布与城市城市化因子之间的关系。沉积物中钴，铬和镍的含量与上海本底土壤中的含量相似，而镉，铜，铅和锌的含量却升高。总体而言，中心城市核心区（CUC;内环高速公路内）的沉积物中Cd，Cu，Pb和Zn的含量显着高于发达市区（DDU;内环和中环之间）高速公路），发展中的城市区域（DIU;中环和外环高速公路之间）和郊区（SU;外环高速公路之外），这表明与高度人类活动相关的点源可能会做出巨大贡献城市化地区。对于Co，Cr和Ni，不同区域之间的浓度和富集度没有显着差异。上海市六个行政区域的Cd，Cu，Pb和Zn含量与路网密度密切相关（R〜2> 0.84），定量证实了这四种金属主要来自交通排放。然而，居住和工业用地的百分比与上海沉积物中的HM（Cd，Cu，Pb和Zn）浓度无关。

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