林甸县地下水中氟的分布规律和水化学特征分析

Analysis of hydrochemical characteristics and distribution of fluoride ion in groundwater at Lindian County

论述大庆林甸县地下水中氟离子空间分布规律,并利用水化学统计分析和水化学模拟方法揭示其产生机理。结果表明:①研究区内高氟地下水多为中等TDS的弱碱性水,其水化学类型以钠镁、钠钙水为主,氟含量与地下水中主要离子成分配比有一定相关关系;②潜水中氟离子聚积成因主要跟阳离子交换和蒸发浓缩作用有关,而承压水中氟离子的形成机理主要为含氟矿物的溶解。

The distribution law of fluoride ions in groundwater in Daqing City, Lindian County,is discussed.The hydrochemical statistical analysis method and hydrochemical simulation model were used to reveal the generation mechanism.The results were as follows：（1） The groundwater with high fluoride concentration was mostly alkalescent water of TDS,and main water chemistry type is the Na-Mg or Na-Ca type.Fluoride content had a certain correlation with the proportions of the main ions in the groundwater.（2） The accumulation of fluorin ions in the groundwater of the unconfined aquifer was mainly due to the cation exchange and evaporation,but the main formation mechanism of the fluorin ions in the confined aquifer was fluorin mineral dissolution.