Major Ion Chemistry of Shallow Groundwater in the Dongsheng Coalfield, Ordos Basin, China
Major Ion Chemistry of Shallow Groundwater in the Dongsheng Coalfield, Ordos Basin, China
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鄂尔多斯盆地东胜煤田浅层地下水主离子化学
DOI：
10.1007/s10230-013-0234-8
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发表时间：
2013-09-01
影响因子：
2.8
通讯作者：
Zhang, Hongbo
中科院分区：
文献类型：
--
作者：
Li, Peiyue;Qian, Hui;Zhang, Hongbo
在中国鄂尔多斯盆地东胜煤田进行了水文地球化学研究，以确定浅层地下水化学成分的机制，并在采矿前记录水质是否符合农业和饮用水供应标准。利用三线图、主成分分析和相关性分析等方法，揭示了浅层地下水的水文地球化学特征和潜在的水-岩相互作用。总体而言，主要阳离子和阴离子的浓度较低，但九胜宫附近的浓度相对较高。九圣宫周围的地下水滞留时间长，也受到广泛的蒸散。主要水化学相类型为HCO 3-Ca、HCO 3-Na和HCO 3-Ca中心点Na中心点Mg混合型。主要离子浓度沿着流动路径的增加，包括Na、Cl和SO 4，与总溶解固体的增加一致。控制地下水化学的主要机制被证明是碳酸盐、石膏和岩盐的溶解。阳离子交换和与当地补给水的混合也是重要因素。研究区浅层地下水水质适宜农业和饮用。
A hydrogeochemical study was conducted in the Dongsheng Coalfield, Ordos Basin, China, to identify the mechanisms responsible for the chemical compositions of the shallow groundwater and to document water quality with respect to agricultural and drinking supply standards, prior to mining. Tri-linear diagrams, principal component analysis, and correlation analysis were used to reveal the hydrogeochemical characteristics of the shallow groundwater, and the potential water-rock interactions. In general, the major cations and anions were present at low concentrations, but were relatively higher around Jiushenggong than elsewhere in the study area. Groundwater around Jiushenggong has a long residence time and is also subject to extensive evapotranspiration. The dominant hydrochemical facies are HCO3-Ca, HCO3-Na, and mixed HCO3-Ca center dot Na center dot Mg types. Increases in major ion concentrations along the flow path, including Na, Cl, and SO4, coincide with increases in total dissolved solids. The predominant mechanism controlling groundwater chemistry proved to be the dissolution of carbonates, gypsum, and halite. Cation exchange and mixing with local recharge water are also important factors. The shallow groundwater quality in the study area is suitable for agricultural and drinking purposes.