摘要
为研究布尔台煤矿高氟地下水的来源及形成机制,采用数理统计、离子分析等手段,在矿物的溶解沉淀、蒸发浓缩、离子交换和竞争吸附等方面对高氟地下水中F^(-)质量浓度特征及分布规律进行研究。结果表明:布尔台煤矿地下水中C(F^(-))范围为0.31~11.15mg/L,平均值1.7mg/L。从空间分布上看,高氟地下水主要分布在1~5mg/L范围内,占总样品数的48.48%;从垂向分布上看,高氟地下水主要分布于侏罗系含水层组,其主要补给水源为第四系与第三系孔隙水和侏罗系孔隙、裂隙水。含氟矿物的溶解是高氟地下水的主要控制因素。Ca^(2+)与固相中的Na^(+)、K^(+)发生强烈的离子交换反应,HCO^(-)_(3)的竞争吸附置换出吸附在黏土矿物表面的F^(-),促使F^(-)富集。
In order to study the source and formation mechanism of high fluorine groundwater in Buertai Coal Mine,the characteristics and distribution law of F-mass concentration in high fluorine groundwater are studied by means of mathematical statistics and ion analysis in the aspects of mineral dissolution and precipitation,evaporation and concentration,ion exchange and competitive adsorption.The results show that the range of C(F^(-))in the groundwater is 0.31~11.15 mg/L,and the average value is 1.7 mg/L.In terms of spatial distribution,high fluorine groundwater is mainly distributed in the range of 1~5 mg/L,accounting for 48.48%of the total samples;in terms of vertical distribution,high fluorine groundwater mainly distributes in Jurassic aquifer group.The main recharge sources of water in high fluorine goaf are Quaternary and tertiary pore water and Jurassic pore and fissure water.The dissolution of fluorine-containing minerals is the main control factor of high fluorine groundwater.Ca^(2+)has a strong ion exchange reaction with Na^(+)and K^(+)in the solid phase,and the competitive adsorption of HCO^(-)_(3) replaces F-adsorbed on the surface of clay minerals,promoting the enrichment of F^(-).
作者
李果
狄军贞
吕情绪
LI Guo;DI Jun-zhen;LYU Qing-xu(CHN Energy Shendong Coal Group Co.,Ltd.,Shenmu 719315,China;College of Civil Engineering,Liaoning Technical University,Fuxin 123000,China)
出处
《煤炭工程》
北大核心
2022年第7期122-128,共7页
Coal Engineering
关键词
氟化物
水岩作用
氢氧同位素
阳离子交换
水化学特征
fluoride
water-rock interaction
hydrogen and oxygen isotopes
cation exchange
hydrochemical characteristic
