青藏高原东缘海东市表土重金属污染特征及源解析

陈霞, 刘亮, 王彦瑜, 赖涓涓, 李梦迪

南京林业大学学报（自然科学版） ›› 2026, Vol. 50 ›› Issue (1) : 112-120.

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南京林业大学学报（自然科学版）
PDF(2348 KB)
南京林业大学学报（自然科学版） ›› 2026, Vol. 50 ›› Issue (1) : 112-120. DOI: 10.12302/j.issn.1000-2006.202405036
研究论文

青藏高原东缘海东市表土重金属污染特征及源解析

作者信息 +

Characteristics of heavy metal pollution in topsoil of Haidong City on the eastern edge of the Qinghai-Xizang Plateau and source parsing

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文章历史 +

摘要

【目的】 以青藏高原东缘海东市表土(0~2 cm)为研究对象,探究青藏高原东缘城市土壤重金属污染特征及污染来源。【方法】采集海东市土壤样品,测定常见土壤重金属元素(Cd、Cr、Cu、Mn、Ni、Pb、Fe和Zn)质量分数并采用单因子污染指数法和地累积污染指数法对海东市土壤重金属污染程度进行评价。利用相关性分析和聚类分析解析重金属来源。【结果】通过海东市表土中重金属元素的单因子污染指数和地累积指数评价结果表明,海东市土壤中除Cr外,其余7 种重金属元素存在不同程度的富集。相关性分析和聚类分析表明,海东市表土Cr、Ni、Mn、Fe和Cu主要来自成土作用和风化过程。Cd、Pb、Zn来自交通污染。【结论】海东市土壤重金属污染主要来源于自然源和交通源。青藏高原东缘土壤重金属污染主要来源为自然源、交通源和矿业活动。不同城市经济结构不同,城市土壤污染元素以及污染程度不同。

Abstract

【Objective】 This study explores heavy metal contamination characteristics and sources in the urban soil of Haidong City, located at the eastern edge of the Qinghai-Xizang Plateau, focusing on the topsoil (0-2 cm).【Method】Soil samples from Haidong City were analyzed for eight key heavy metal elements (Cd, Cr, Cu, Mn, Ni, Pb, Fe and Zn). The pollution status of these metals was assessed using the single-factor pollution index (Pi) method and the geoaccumulation index (Igeo) approach. Correlation and cluster analyses were performed to determine the sources of heavy metal contamination.【Result】Based on Pi and Igeo indices, seven of the eight heavy metals (excluding Cr) showed varying degrees of enrichment in Haidong’s topsoil. Correlation and cluster analyses revealed that Cr, Ni, Mn, Fe and Cu were primarily attributed to natural processes such as soil formation and weathering, whereas Cd, Pb and Zn were mainly linked to traffic-related pollution. 【Conclusion】In Haidong City, the primary sources of heavy metal pollution in soil are natural processes and transportation. For the eastern margin of the Qinghai-Xizang Plateau, significant contributors include natural sources, transportation, and mining activities. Variations in pollution levels and sources are influenced by the differing economic structures of cities.

关键词

土壤重金属 / 污染特征 / 源解析 / 青藏高原东缘 / 海东市

Key words

soil heavy metals / pollution characteristics / source analysis / the eastern edge of the Qinghai-Xizang Plateau / Haidong City

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陈霞, 刘亮, 王彦瑜, 等. 青藏高原东缘海东市表土重金属污染特征及源解析[J]. 南京林业大学学报（自然科学版）. 2026, 50(1): 112-120 https://doi.org/10.12302/j.issn.1000-2006.202405036
CHEN Xia, LIU Liang, WANG Yanyu, et al. Characteristics of heavy metal pollution in topsoil of Haidong City on the eastern edge of the Qinghai-Xizang Plateau and source parsing[J]. Journal of Nanjing Forestry University (Natural Sciences Edition）. 2026, 50(1): 112-120 https://doi.org/10.12302/j.issn.1000-2006.202405036
中图分类号： X53   

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