Ecological, environmental risks and sources of arsenic and other elements in soils of Tuotuo River region, Qinghai-Tibet Plateau.

IF 3.2 3区环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL Environmental Geochemistry and Health Pub Date : 2024-10-01 DOI:10.1007/s10653-024-02161-6

Cang Gong, Lang Wen, Haichuan Lu, Shunxiang Wang, Jiufen Liu, Xiang Xia, Zihong Liao, Duoji Wangzha, Wangdui Zhaxi, Jiancai Tudan, Changhai Tan

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Abstract

Against the backdrop of global warming, the pollutants that were once "temporarily stored" in the permafrost are gradually being released, posing significant impacts on the environment. This has become an internationally focused hot topic. In this study, the contents of 11 elements such as As, Ti, Cd, Cr, Co, Mn, Cu, Pb, Ni, Zn and V in soil samples from 128 sampling points in the freeze-thaw area of the Tuotuo River in the source region of the Yangtze River on the Qinghai-Tibet Plateau were determined to evaluate the possible sources, contamination status and ecological, environmental and health risks of these elements. The mean values of As, Cd, Pb and Zn were higher than the corresponding Tibet soil background values. Among fourteen PTEs, As, Cd and Pb had the highest average values of enrichment factor and pollution index, indicating that freeze-thaw area soils showed moderate enrichment and pollution with As, Cd and Pb. Mean ecological risk factor (ER) of Cd was 109 and other PTEs mean ER values < 40, whereas ecological risk index (RI) values of all PTEs ranged from 59.5 to 880 and mean RI values was 152, indicating moderate ecological risk in study area. Explanatory power q value of total S (TS) content was 0.217 by GeogDetector, indicating TS was the most significant contributing factor to RI. Correlation analysis and PCA analysis showed that Cr, Cu, Ni, Co, Mn, Ti, V were mainly originated from natural sources, Cd, Pb and Zn from traffic activity, As from long-distance migration-freeze-thaw.

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青藏高原沱沱河地区土壤中砷和其他元素的生态、环境风险及来源。

在全球变暖的背景下，曾经 "暂时储存 "在永久冻土层中的污染物正逐渐释放出来，对环境造成重大影响。这已成为国际关注的热点话题。本研究测定了青藏高原长江源区沱沱河冻融区 128 个采样点土壤样品中 As、Ti、Cd、Cr、Co、Mn、Cu、Pb、Ni、Zn 和 V 等 11 种元素的含量，以评价这些元素的可能来源、污染状况以及生态、环境和健康风险。As、Cd、Pb 和 Zn 的平均值均高于相应的西藏土壤背景值。在 14 种 PTEs 中，As、Cd 和 Pb 的富集因子平均值和污染指数最高，表明冻融区土壤对 As、Cd 和 Pb 有中度富集和污染。镉的生态风险因子（ER）均值为 109，其他 PTE 的生态风险因子均值为

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来源期刊

Environmental Geochemistry and Health 环境科学-工程：环境

CiteScore

8.00

自引率

4.80%

发文量

279

审稿时长

4.2 months

期刊介绍： Environmental Geochemistry and Health publishes original research papers and review papers across the broad field of environmental geochemistry. Environmental geochemistry and health establishes and explains links between the natural or disturbed chemical composition of the earth’s surface and the health of plants, animals and people. Beneficial elements regulate or promote enzymatic and hormonal activity whereas other elements may be toxic. Bedrock geochemistry controls the composition of soil and hence that of water and vegetation. Environmental issues, such as pollution, arising from the extraction and use of mineral resources, are discussed. The effects of contaminants introduced into the earth’s geochemical systems are examined. Geochemical surveys of soil, water and plants show how major and trace elements are distributed geographically. Associated epidemiological studies reveal the possibility of causal links between the natural or disturbed geochemical environment and disease. Experimental research illuminates the nature or consequences of natural or disturbed geochemical processes. The journal particularly welcomes novel research linking environmental geochemistry and health issues on such topics as: heavy metals (including mercury), persistent organic pollutants (POPs), and mixed chemicals emitted through human activities, such as uncontrolled recycling of electronic-waste; waste recycling; surface-atmospheric interaction processes (natural and anthropogenic emissions, vertical transport, deposition, and physical-chemical interaction) of gases and aerosols; phytoremediation/restoration of contaminated sites; food contamination and safety; environmental effects of medicines; effects and toxicity of mixed pollutants; speciation of heavy metals/metalloids; effects of mining; disturbed geochemistry from human behavior, natural or man-made hazards; particle and nanoparticle toxicology; risk and the vulnerability of populations, etc.