An unconstrained ordination- and GIS-based approach for identifying anthropogenic sources of heavy metal pollution in marine sediments

文献类型： 外文期刊

第一作者： Gu, Yang-Guang

作者： Gu, Yang-Guang;Gao, Yan-Peng;Gao, Yan-Peng;Gu, Yang-Guang;Gu, Yang-Guang

作者机构：

关键词： Heavy metal; Sediments; Nonmetric multidimensional scaling; Geographic information system (GIS); Pollution

期刊名称：MARINE POLLUTION BULLETIN （ 影响因子：5.553； 五年影响因子：5.907 ）

ISSN： 0025-326X

年卷期： 2019 年 146 卷

页码：

收录情况： SCI

摘要： A new method consisting of enrichment factor (EF) determination, nonmetric multidimensional scaling (NMS), and the geographic information system (GIS) technique was firstly developed to identify anthropogenic heavy metal sources in marine sediments of Hong Kong. Firstly, the EF was determined to differentiate between heavy metals originating from human and natural sources. Subsequently, NMS was applied to identify various source patterns of heavy metals, and the NMS score was calculated and spatially interpolated using GIS technology to evaluate the spatial influences of anthropogenic impacts in different areas. The concentrations of heavy metals in sediments of Hong Kong substantially exceeded their background values, demonstrating anthropogenic pollution. Two different types of human sources could be identified via NMS, one representing the industrial pollution discharges in the period from the 1960s to the 1980s before pollution control was introduced and one representing sewage discharge before the Tolo Harbour Action Plan in the mid-1980s.

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