摘要
内蒙古布尔台煤矿存在高氟矿井水,制约了矿区居民的生活用水,急需分析高氟水化学特征和成因。本文在实地勘探和水文地质调查的基础上,通过系统采集16组矿井水样品,分析了矿井水中的F-的含量及水化学特征,并从岩石矿物的溶解与沉淀、蒸发浓缩、阳离子交换和解吸与竞争吸附4个方面对高氟水成因进行研究。结果表明:矿井水中F-浓度为1.15~12.75 mg/L,平均值为7.17 mg/L,均超出我国饮用水1.0 mg/L的标准,高氟矿井水偏碱性,水化学类型为Na-HCO_(3)-Cl、Na-HCO_(3)和Na-HCO_(3)-SO_(4)型。萤石等含氟矿物溶解为矿井水中氟的主控来源,方解石、白云石等含钙矿石的沉淀作用影响萤石的溶解平衡,蒸发浓缩、阳离子交换作用和HCO-3的竞争吸附作用从不同方面直接或间接的促进氟的富集。
There is high-fluorine mine water in Buertai Coal Mine in Inner Mongolia,which restricts the living water of the residents in the mining area.It is urgent to analyze the chemical characteristics and causes of high-fluorine water.In this paper,on the basis of field exploration and hydrogeological survey,16 sets of mine water samples were collected by this systematically,the F-content and hydrochemical characteristics in mine water were analyzed.And the causes of high fluorine water were studied in four aspects:dissolution and precipitation,evaporation and concentration,cation exchange,desorption and competitive adsorption.The results show that the concentration of F-in mine water range from 1.15 to 12.75 mg/L,with an average of 7.17 mg/L,which exceeds the national standard of 1.0 mg/L for drinking water.The high fluoride mine water is alkaline,and the hydrochemical types were Na-HCO_(3)-Cl,Na-HCO_(3) and Na-HCO_(3)-SO_(4).Fluorine minerals such as fluorite dissolved as the main source of fluorine in mine water.The precipitation of calcium ores such as calcite and dolomite affects the dissolution equilibrium of fluorite,and evaporation and concentration,cation exchange and competitive adsorption of HCO-3 directly or indirectly promots the enrichment of fluorine from different aspects.
作者
张伟
郝春明
刘敏
ZHANG Wei;HAO Chunming;LIU Min(School of Safety Engineering,North China Institute of Science and Technology,Yanjiao,065201,China)
出处
《华北科技学院学报》
2021年第3期10-18,共9页
Journal of North China Institute of Science and Technology
基金
国家重点实验室开放课题资助项目(SHJ-17-42.17)
河北省硕士研究生创新资助项目(CXZZSS2021166)
中央高校基本科研业务费资助项目(3142018009)。
关键词
高氟矿井水
水化学特征
成因分析
布尔台
high fluoride mine drainage
hydrochemical characteristics
cause analysis
Buertai
