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Impacts of urbanization on the distribution of heavy metals in soils along the Huangpu River, the drinking water source for Shanghai

机译：城市化对上海饮用水源黄浦江沿岸土壤中重金属分布的影响

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摘要

We investigated the horizontal and vertical distribution of heavy metals (Hg, Pb, Zn, Cu, Cd, As, Ni, and Cr) in soils in the water source protection zone for Shanghai to study the origins of these metals, their connections with urbanization, and their potential risk posed on the ecosystem. Determination of metal concentrations in 50 topsoil samples and nine soil profiles indicated that Hg, Pb, Zn, and Cu were present in significantly higher concentrations in topsoil than in deep soil layers. The spatial distributions of Hg, Pb, Zn, and Cu and contamination hotspots for these metals in the study area were similar to those near heavy industries and urban built-up areas. Emissions from automobiles resulted in increased soil concentrations of Cu, Pb, and Zn along roadsides, while high concentrations of Hg in the soil resulted from recent atmospheric deposition. Calculation of the potential ecological risk indicated that the integrative risk of these heavy metals in most areas was low, but a few sites surrounding high density of factories showed moderate risks.
机译：我们调查了上海水源保护区土壤中重金属（Hg，Pb，Zn，Cu，Cd，As，Ni和Cr）的水平和垂直分布，以研究这些金属的来源及其与城市化的关系，以及它们对生态系统构成的潜在风险。确定50个表土样品和9个土壤剖面中的金属浓度表明，表土中Hg，Pb，Zn和Cu的含量明显高于深土层。研究区域中这些金属的Hg，Pb，Zn和Cu的空间分布以及污染热点与附近重工业和城市建成区相似。汽车的排放导致路边土壤中Cu，Pb和Zn的浓度增加，而近期大气中的沉积导致土壤中Hg的浓度较高。对潜在生态风险的计算表明，大多数地区这些重金属的综合风险较低，但是工厂周围高密度工厂中的少数几个地点的风险中等。

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