淮北平原浅层地下水氟的水化学特征及影响因素分析

以淮北平原浅层地下水中的氟离子为研究对象,在分析地形地貌、水文地质条件、地下水化学成分(总硬度、矿化度、氟离子等)、水化学类型特征等基础上,运用统计方法分析了氟离子浓度与pH值、K++Na+浓度、Ca2+浓度、ρ(K++Na+)/ρ(Ca2+)比值、Mg2+浓度之间的关系。结果表明氟离子浓度随地下水pH值的增大而增大,与ρ(K++Na+)/ρ(Ca2+)比值之间存在着正相关关系,但是与K++Na+浓度、Ca2+浓度、Mg2+浓度之间并无明显的相关性。最后讨论了氟离子的影响因素,提出合理利用地下水的建议。

Chemical characteristics and influential factors of fluorine ions in shallow groundwater of Huaibei Plain

After analyzing the topography and geomorphology, the hydrogeological conditions, the chemical components （total hardness, salinity, and fluorine ion）, and the hydro-chemical characteristics of the shallow groundwater in the Huaibei Plain, this study analyzed the F^- content variation with pH, the total content of K^＋ and Na^＋ , the Ca^2＋ content, the （K^＋ ＋ Na^＋ ）/Ca^2＋ ratio, and the Mg^2＋ content using statistical methods. It was found that that the F^- content increases along with the pH value and is linearly related to the （K^＋ ＋ Na^＋ ）/Ca^2＋ ratio, but no apparent correlation has been found between the F^- content and the total K^＋ and Na^＋ content, the Ca^2＋ content, or the Mg^2＋ content. This paper also discusses the factors affecting F^- and gives suggestions for reasonable utilization of groundwater resources.