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首页> 美国卫生研究院文献>International Journal of Environmental Research and Public Health >Analysis of Heavy Metal Sources in the Soil of Riverbanks Across an Urbanization Gradient
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Analysis of Heavy Metal Sources in the Soil of Riverbanks Across an Urbanization Gradient

机译：城市化梯度下河岸土壤重金属来源分析

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摘要

Regional soil quality issues arising from rapid urbanization have received extensive attention. The riverbank that runs through a city is representative of urbanization gradient transformation. Thirty soil samples in the Yangtze River Delta urban agglomeration were collected and analyzed for the concentrations of seven analytes. Correlation, principle component analysis, cluster analysis and GeoDetector models suggested that the four groups (Cr-Ni-Cu, Cu-Zn-As-Sb, Cd and Pb) shared the same sources in the core urban region; five groups (Cr-Ni-Cu-Zn, As, Cd, Sb and Pb) in the suburbs and three groups (Cr-Ni, Cu-Zn-Cd-Sb-Pb and As) in the exurbs. GeoDetector methods not only validated the results of the three other methods, but also provided more possible impact factors. Besides the direct influences, the interaction effects among factors were quantified. Interactive combination with strong nonlinear increment changed from between-two-weak factors in the central region to between-strong-and-weak factors in the suburbs. In the exurbs, the stronger interaction effects were observed between strong and weak factors. Therefore, the GeoDetector model, which provided more detailed information of artificial sources could be used as a tool for identifying the potential factors of toxic elements and offering scientific basis for the development of subsequent pollution reduction strategies.
机译：快速城市化引起的区域土壤质量问题已受到广泛关注。贯穿城市的河岸是城市化梯度转变的代表。收集了长江三角洲城市群中的30个土壤样品，并分析了7种分析物的浓度。相关性，主成分分析，聚类分析和GeoDetector模型表明，四组（Cr-Ni-Cu，Cu-Zn-As-Sb，Cd和Pb）在核心城市区域共享相同的来源。郊区有五个族群（Cr-Ni-Cu-Zn，As，Cd，Sb和Pb），郊区有三个族群（Cr-Ni，Cu-Zn-Cd-Sb-Pb和As）。 GeoDetector方法不仅验证了其他三种方法的结果，而且还提供了更多可能的影响因素。除了直接影响外，还量化了因素之间的相互作用。具有强非线性增量的交互式组合从中部地区的两个弱因素变为郊区的强因素和弱因素。在郊区，观察到强和弱因素之间的相互作用更强。因此，提供了更多人造源信息的GeoDetector模型可以用作识别有毒元素的潜在因素的工具，并为制定后续的减少污染策略提供科学依据。

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