滇中中高山丘陵区大气干湿沉降元素地球化学特征及来源解析

doi:10.11720/wtyht.2023.1593

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Abstract

Dry and wet atmospheric deposition is an essential input pathway for surface soil elements. To explore the geochemical characteristics and sources of elements from atmospheric deposition in the middle-high mountain and hilly region of Central Yunnan, this study investigated 35 dry and wet atmospheric deposition samples from three counties in Central Yunnan. The results show that nutrient elements exhibited high annual depositional fluxes, while heavy metal elements manifested low annual depositional fluxes, with their ranking as follows: TOC>Ca>K>I>F>Zn>B>Pb>Cr>Cu>As>Mo>Cd>Se>Ge>Hg. As revealed by the enrichment factors, principal components, and spatial distribution characteristics, Ca, Mo, B, As, and F originated primarily from soil dust; Cu, Cd, Pb, Cr, and Ge were mostly from anthropogenic sources, such as mining activities and coal dust; TOC, K, Se, and I came from both coal dust and soil dust, and Se was also affected by mining activities; and Hg stemmed from coal dust. Coal and copper-dominated polymetallic mineral resources spread extensively across the study area and are subjected to certain mining activities, which are intimately connected with the contents of heavy metals in the atmosphere. Therefore, targeted atmospheric monitoring should be conducted to ensure atmospheric quality and no pollution to soil.

Key words： dry and wet atmospheric deposition geochemical characteristics source Central Yunnan

Received: 29 November 2022 Published: 23 January 2024

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	Articles by authors
	Lei XU
	Jun LI
	Qiang QU
	Fang-Ping WEN
	Meng-Sheng ZHAO
	Yan-Xun CHENG
	Jie Xu
	Hao-Yu WANG

Cite this article:

Lei XU,Jun LI,Qiang QU, et al. Geochemical characteristics and source analysis of elements from dry and wet atmospheric deposition in the middle-high mountain and hilly region of Central Yunnan[J]. Geophysical and Geochemical Exploration, 2023, 47(6): 1602-1610.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2023.1593 OR https://www.wutanyuhuatan.com/EN/Y2023/V47/I6/1602

Sampling sites and mineral resource distribution in the study area

Statistics of annual element deposition flux of atmospheric dry and wet deposition in the study areamg·(m²·a)^-1

Elemental enrichment factor characteristics of atmospheric dry deposition

Characteristic value of principal components and their contribution rate in atmospheric dry and wet deposition

Factor load matrix of orthogonal variance rotation of atmospheric dry and wet deposition

Three-dimensional schematic diagram of each component score of atmospheric dry and wet deposition

Spatial distribution of annual element flux of atmospheric dry and wet deposition(unit: mg/(m²·a))

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