ORIGINAL RESEARCH
Potentially Toxic Metal(loid) Contamination Impact of the Weathering Profile in the Karst Area with Artisanal Zinc Smelting
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1
College of Tea Science, Guizhou University, Guiyang 50025, China
 
2
College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, China
 
3
Institute of Mountain Resources of Guizhou Province, Guizhou Academy of Sciences, Guiyang 550001, China
 
4
State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
 
 
Submission date: 2024-10-23
 
 
Final revision date: 2024-12-13
 
 
Acceptance date: 2024-12-29
 
 
Online publication date: 2025-02-13
 
 
Corresponding author
Yishu Peng   

Guizhou University, Guizhou University, Huaxi District, Guiyang 550025, 550025, Guiyang, China
 
 
Ruidong Yang   

College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, China
 
 
 
KEYWORDS
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ABSTRACT
To assess soil potentially toxic metal(loid) contamination in the karst area resulting from anthropogenic activity, we conducted a study on the potentially toxic metal(loid) contents of four carbonate rock weathering profiles in the karst area with artisanal zinc smelting in Northwestern Guizhou Province, China. The levels of As, Cr, Cu, and Hg in the artisanal zinc smelting slag do not contaminate the soil of the carbonate rock weathering profile. However, soil Cd, Pb, and Zn are contaminated within soil depths of 50 cm, 10 cm, and 50 cm, respectively, by the artisanal zinc smelting slag. The Cd, Pb, and Zn in the slag are the main polluted elements in the surrounding area, and their contaminated levels and depths are different in the various rock-type weathering profiles. The severe pollution level of As, Cd, Pb, and Zn in the soil near the lead-zinc ore mining site might be attributed to the lead-zinc mineralization of the bedrock during the weathering process. The ratio of Zn/Cd to Pb/Cd is an effective tool in identifying the sources of potentially toxic metal(loid)s in the soil of the artisanal zinc smelting area. In the future, it is essential to consider the contribution of bedrock weathering (i.e., the geological body mineralization influence) and anthropogenic activity when studying the soil potentially toxic metal(loid) contamination of the metal ore mining site.
CONFLICT OF INTEREST
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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