摘要
安徽省的宿临矿区存在高氟中层地下水,而对其中的氟分布及成因研究甚少。为此,通过系统采集30个宿临矿区中层地下水样品,研究了F-分布特征,并探讨了地下水中F-的形成机制。结果表明,宿临矿区中层地下水中F-质量浓度为0.16~2.06 mg/L,均值为1.07 mg/L,相比《生活饮用水卫生标准》(GB 5749—2006)有53%的样品超标,高氟水(F-≥1.0 mg/L)面积达到1958 km 2,占总面积的64.1%,水化学类型为HCO 3-Na型。蒸发浓缩,方解石、白云石沉淀和萤石溶解,OH^(-)、HCO^(-)_(3)与F^(-)的竞争吸附,以及地下水中的Ca^(2+)、Mg^(2+)与矿物质中的Na^(+)、K^(+)阳离子交换等作用是宿临矿区高氟中层地下水的主要形成机制。
High fluorine middle-level groundwater exists in Sulin mining area,Anhui.However,fluorine distribution and its formation mechanism are not fully understood.30 middle-level groundwater samples in Sulin mining area were collected.F-distribution characteristics was studied,and the formation mechanism was discussed.Results showed that the middle-level groundwater F^(-)mass concentration in Sulin mining area was 0.16-2.06 mg/L,with the average of 1.07 mg/L.53%samples had exceeded“Standards for drinking water quality”(GB 5749-2006)with HCO_(3)-Na hydrochemical type.The area of high F^(-)groundwater(F^(-)≥1.0 mg/L)reached 1958 km^(2),covering 64.1%of the total area.Evaporation and concentration,calcite and dolomite sedimentation and fluorite dissolution,OH^(-)and HCO^(-)_(3)competitive adsorption with F^(-),and Ca^(2+)and Mg^(2+)in groundwater exchange with Na^(+) and K^(+) in minerals were the main high F-formation mechanisms.
作者
张伟
郝春明
林冬健
贾艳丽
ZHANG Wei;HAO Chunming;LIN Dongjian;JIA Yanli(School of Safety Engineering,North China Institute of Science and Technology,Langfang Hebei 065201;School of Chemical&Environmental Engineering,China University of Mining and Technology(Beijing),Beijing 100083)
出处
《环境污染与防治》
CAS
CSCD
北大核心
2021年第8期1022-1027,共6页
Environmental Pollution & Control
基金
河北省硕士研究生创新资助项目(No.CXZZSS2021166)
冷水江锡矿山生态环境承载力评价项目(No.LCG2020009)
中央高校基本科研业务费专项(No.3142018009)。
关键词
高氟水
中层地下水
水化学类型
宿临矿区
high fluoride water
middle-level groundwater
hydrochemical type
Sulin mining area
