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珍珠河三角洲土壤和沉积物中潜在有毒元素的分布,中国:自然与人为来源的歧视

Jiaxin Wang¹, Jiaxin Yuan², Qingye Hou¹

¹School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China.

The Science of the total environment

|August 26, 2023

概括

在珍珠河三角洲,原生物质,而不是人类活动,主要是塑造土壤的潜在毒性元素 (PTEs). 然而,人为活动导致表面土壤中局部,扩散的PTE污染.

科学领域:

环境地质化学环境地质化学
土壤科学土壤科学
污染研究污染研究

背景情况:

人为污染通常被认为是河流三角洲土壤中潜在有毒元素 (PTEs) 的主要来源.
人类活动对工业化和城市化三角洲平原中PTE分布的具体影响需要详细调查.

研究的目的:

区分珍珠河三角洲经济区内土壤中PTE的来源,珍珠河三角洲经济区是一个高度工业化和城市化的地区.
评估自然母体材料与人为活动对土壤中PTE度的相对贡献.

主要方法:

利用高密度的地化学数据进行全面的土壤分析.
应用统计方法,包括丰富系数,差分分析,主要成分分析,累积分布函数和正矩阵分解.
在溪流沉积物,深层土壤和表面土壤中分析了PTE度.

主要成果:

确定母体物质是影响PTE土壤地质化学特性的主要因素.
在所有土壤类型和溪流沉积物中,关键PTE (Cd,Cr,Cu,Hg,Pb,Zn) 的中位数度超过了相关的参考标准.
与溪流沉积物和深层土壤相比,表面土壤显示出更高的PTE度.
化学气候和当地母体材料的侵蚀被确定为PTE的主要自然来源.
扩散污染和众多小型局部来源是对地表土壤最重要的人为输入.

结论:

人类的密集活动并没有改变宏观的区域土壤地质化学特征,这些特征仍然受到母体材料的控制.
人为因素导致非点源污染和表面土壤局部严重PTE污染.
了解源分配对于在三角洲环境中管理PTE污染至关重要.

关键词:

一个私人企业的PTE.珍珠河三角洲经济区积极矩阵因子化 (PMF)土壤土壤土壤.源头歧视源头歧视溪流沉积物的沉积物

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