Abstract To elucidate the environmental geochemistry characteristics of groundwater in Huainan Coalfield, the largest coalfield in southern China, 59 groundwater samples from 12 locations were collected and measured for 18 heavy metals (Li, V, Cu, Pb, Zn, Cd, Ni, Mn, Co, Cr, Fe, Ba, Al, Be, Ti, Sr, Mo, and As), pH, and 7 ions (K+, Na+, Ca2+, Mg2+, Cl–, SO42–, and HCO3–). The Fe and Mn contents of most water samples were within class III of the People’s Republic of China Quality Standard for Groundwater. The Pb, Zn, Cd, Cr, Co, and Ba contents were assessed by the fuzzy mathematical method, and their levels in the groundwater were within class II. pH was negatively correlated with 11 heavy metals (Li, V, Cu, Pb, Zn, Cd, Ni, Mn, Cr, Ba, and Sr) and positively correlated with Al, Ti, and Co. The ranking of uptake rates affected by pH was Al > Ba > Ti > Si > Li > Mn. The Li content was correlated with six ions (Na+, Ca2+, Mg2+, Cl–, SO42–, and HCO3–), Sr was correlated with the first five ions, and Ba was correlated with the first four ions. Principal component analysis of V, As, Mn, Pb, Cd, Ni, Cr, Li, and Zn in the groundwater indicated that they derived from lixiviation of soil and rocks, precipitation, surface runoff, and surface pollution by heavy metals.

中文翻译：

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煤矿区地下水重金属环境地球化学——以淮南煤田丁集煤矿为例

摘要 为阐明华南最大煤田淮南煤田地下水环境地球化学特征，采集了12个地点的59个地下水样品，测定了18种重金属（Li、V、Cu、Pb、Zn、Cd、Ni、Mn）。 、Co、Cr、Fe、Ba、Al、Be、Ti、Sr、Mo 和 As）、pH 和 7 种离子（K+、Na+、Ca2+、Mg2+、Cl–、SO42– 和 HCO3–）。大部分水样中铁、锰含量均在《中华人民共和国地下水质量标准》Ⅲ类范围内。Pb、Zn、Cd、Cr、Co、Ba的含量采用模糊数学方法评价，在地下水中的含量均在Ⅱ类内。pH 与 11 种重金属（Li、V、Cu、Pb、Zn、Cd、Ni、Mn、Cr、Ba 和 Sr）呈负相关，与 Al、Ti 和 Co 呈正相关。 pH 为 Al > Ba>Ti>Si>Li>Mn。Li 含量与六个离子（Na+、Ca2+、Mg2+、Cl-、SO42- 和 HCO3-）相关，Sr 与前五个离子相关，Ba 与前四个离子相关。地下水中V、As、Mn、Pb、Cd、Ni、Cr、Li、Zn的主成分分析表明，它们来源于土壤和岩石的浸出、降水、地表径流和重金属的地表污染。