Hydrochemical characteristics, cross-layer pollution and environmental health risk of groundwater system in coal mine area: a case study of Jiangzhuang coal mine.

Autor: Cheng W; College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao, 266590, China., Yin H; College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao, 266590, China. yhy1919@163.com., Dong F; College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao, 266590, China., Li Y; College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao, 266590, China., Guo Q; Jiangzhuang Coal Mine, Zaozhuang Mining Group Co, Ltd, 277606, Zaozhaung, China., Wang Y; Jiangzhuang Coal Mine, Zaozhuang Mining Group Co, Ltd, 277606, Zaozhaung, China.
Jazyk: angličtina
Zdroj: Environmental geochemistry and health [Environ Geochem Health] 2024 Nov 21; Vol. 46 (12), pp. 523. Date of Electronic Publication: 2024 Nov 21.
DOI: 10.1007/s10653-024-02304-9
Abstrakt: Long-term coal mining activities have significantly disturbed the groundwater system, resulting in aquifer water characterized by high levels of Na + , SO 4 2- , and total dissolved solid (TDS), posing environmental health risks. To investigate the disturbance effects of coal mining activities on the groundwater system and ascertain the goaf water (OGW) environmental impacts, this study focuses on the surface water (SW), major aquifers, and OGW of Jiaozhuang Coal Mine. Through ion analysis and self-organizing map (SOM) clustering, the study analyzes the hydrochemical characteristics of the aquifer water, summarizes the accumulation patterns of OGW, and evaluates water quality of irrigation and drinking using sodium adsorption ratio (SAR), sodium percentage (SSP), and comprehensive pollution index (F). The results show that the hydrochemical characteristics of the groundwater system are influenced by a combination of cation exchange, dissolution, and mixing processes, with deep aquifers exhibiting high Na + and SO 4 2- levels. The OGW mainly originates from the coal roof sandstone aquifers water (RSW) and 3rd limestone aquifer water (3LW). Additionally, the groundwater shows high alkalinity and salinity hazards, with irrigation water quality assessments falling into general and unsuitable water quality area. Moreover, the groundwater quality is below Class III standards, with the worst being Class V, rendering it unsuitable as a drinking water source. Untreated discharge of OGW to the surface can easily threaten human drinking water health. The study results are helpful in identifying and controlling groundwater pollution caused by coal mining, ensuring the safety and sustainable utilization of water resources in mining areas and surrounding regions.
Competing Interests: Declarations. 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. The authors declare no competing interests.
(© 2024. The Author(s), under exclusive licence to Springer Nature B.V.)
Databáze: MEDLINE
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