Geochemical characteristics of rare earth elements in groundwater of Banji Coal Mine
Journal Title: Energy Environmental Protection - Year 2023, Vol 37, Issue 6
Abstract
Rare earth elements possess stable and similar geochemical properties, making them widely utilized in the study of groundwater-aquifer interactions and geochemical processes. In this study, taking the Banji Coal Mine in the Huainan Coalfield as the research area, water samples including sandstone water, gray overburden water, and mixed water from mined-out areas were collected. These samples were tested and analyzed for their rare earth element contents, as well as conventional water chemistry ions. The objective was to investigate the hydrochemical characteristics of groundwater in the mining area, the distribution of the rare earth element as well as the related controlling factors. The results showed that the average mass concentrations of Na^++K^+, Cl-, and HCO_3^-in the groundwater of the mining area were determined to be 669.1, 820.3, and344.0 mg/L, respectively. Based on the water quality types, we classified the groundwater primarily into Cl-Na type, Cl-HCO_3-Na type, and HCO_3-Na type. Generally, the rare earth element contents in the groundwater fell within a lower concentration range. However, three mixed water samples exhibited significant enrichment of heavy rare earth elements, while most of the water samples demonstrated light rare earth enrichment. Notably, Eu displayed the highest content, primarily due to its separation from the rare earth element group during crystallization and precipitation with calcium minerals. Correlation redundancy analysis unveiled a linear relationship between Eu and Fe in the groundwater samples of the area. The adsorption of Fe oxides with rare earth might be a significant controlling factor influencing the rare earth element content. This study is of significance to a comprehensive understanding of the geochemical processes in the groundwater system of the Banji Coal Mine in the Huainan Coalfield. Furthermore, it provides a scientific basis for the evaluation and management of groundwater in the mining areas.
Authors and Affiliations
DU Shaoneng|China Coal Xinji Energy Co.,Ltd., China, LI Haozhi|School of Resource and Environmental Engineering, Anhui University, China, JIANG Zhaojing|China Coal Xinji Energy Co.,Ltd., China, CHU Chengxiang|China Coal Xinji Energy Co.,Ltd., China, HUANG Wendi|School of Resource and Environmental Engineering, Anhui University, China, ZHENG Liugen*|School of Resource and Environmental Engineering, Anhui University, China
Keywords
Related Articles
- EP ID EP738062
- DOI 10.20078/j.eep.20231009
- Views 54
- Downloads 0
Construction and Application of an Evaluation Indicator System for Urban Water Supply System Efficiency
With the expansion of urbanization, the scientific and reasonable evaluation of the efficiency of urban water supply systems is crucial for advancing the water supply industry toward high-quality development. The water s...
Advances in CO-SCR Catalysts and Reaction Mechanisms
Driven by increasingly stringent nitrogen oxides (NOx) control requirements, and the limitations of NH3-selective catalytic reduction (NH3-SCR) technology, CO-selective catalytic reduction (CO-SCR) technology is attracti...
Main factors influencing the electro-methanation of CO_2 in microbial electrolytic cells and the role of electron intermediates
Greenhouse gas emissions from fossil fuel combustion have led to global ecological degradation and energy crisis. Therefore, it is urgent to explore new technologies for the conversion, reuse and clean energy production...
Experimental study on fluoride removal from mine water by complexing-induction fluoride removal agent
In ecologically fragile areas of western and northwestern China, where coal mine water is reused as domestic water or discharged into surface water systems after treatment (the discharge concentration of fluoride (F^-) i...
Research Progress on Enhancing Acid Production from Anaerobic Fermentation of Waste Activated Sludge by Different Pretreatment Methods
The generation of waste activated sludge (WAS) in China has reached substantial levels, posing significant challenges in both disposal costs and environmental management. As urbanization and industrialization continue to...