安徽淮北平原浅层地下水中氟的分布特征及影响因素分析

以安徽淮北平原浅层地下水中的氟为研究对象,通过130个水样的相关指标测试后发现:氟在水平分布上西北向东南逐渐降低的趋势,西北部氟浓度均值在2.0 mg/L以上;垂向分布呈现先增大后减小的变化趋势,其深度在20～30 m处的氟临界值约为1.63 mg/L.含氟矿物的不断溶解是浅层地下水中氟的主要物质来源.此外,气候、地形地貌及径流条件,水化学类型以及地下水的环境介质是造成氟浓度富集的外在因素.

Analysis of Distribution Characteristics and Influencing Factors for the Fluorine in the Shallow Groundwater in HuaiBei Plain of Anhui

Fluorine in the groundwater was taken as the study object in Huaibei Plain.After testing 130 water samples, the results shown that the horizontal distribution of fluorine from the northwest to the southeast decreases gradually, the mean of fluorine value in the northwest is more than 2.0 mg/L; Vertical distribution of fluorine shows the trend of increasing at first then decreasing, the critical mean of fluorine is 1.63 mg/L at the depth range from 20 to 30 meters. Continuously dissolved fluorine-containing minerals is the main source of fluorine in the shallow groundwater. In addition, the climate, topography and runoff conditions, the water chemical types and the groundwater environmental media are the external factors on the enrichment of fluorine concentration.