摘要
通过水文地质调查、现场采样、室内测试分析等方法,对安徽省濉溪县浅层地下水中氟的分布特征及影响因素进行研究.结果表明:濉溪县浅层地下水样品超标率达35.3%,氟的质量浓度ρ(F-)最高达4.63 mg/L,主要分布于濉溪县中部平原地区;ρ(F-)与ρ(HCO-3)、(ρ(Na+)+ρ(K+))/ρ(Ca2+),ρ(Cl-)和p H值呈正相关关系,而与温度、ρ(SO2-4)和ρ(Ca2+)呈负相关关系;Ca2+与F-生成的Ca F2沉淀是地下水中抑制F-浓度的主要物质,ρ(F-)与ρ(Cl-)的相关关系也表明浅层地下水中的氟受到人为因素的影响,同时ρ(F-)与p H的关系表明氟在碱性、偏碱性水中易于富集.
The distribution and influence factors of fluorine in shallow groundwater in Suixi,Anhui,was studied by using the methods such as hydrogeological survey,field sampling and laboratory experiment. The results demonstrate that the highest fluoride concentration of shallow groundwater is up to 4. 63 mg / L,with the exceeding rate of 35. 3% from a total number of 34 samples,which are mainly scattered around the central plain regions of Suixi county. Fluoride concentration is correlated positively with ρ（ HCO3^-）,（ ρ（ Na^＋） ＋ ρ（ K^＋）） /ρ（ Ca^2 ＋）,ρ（ Cl^-）,p H value,and has a negative correlation with temperature,ρ（ SO4^2-） and ρ（ Ca^2＋）. CaF2 precipitation is the main substance to inhibit F-ion concentration in groundwater,the correlation of ρ（ F^-） and ρ（ Cl^-） shows that human factors also affect the fluoride concentration of shallow groundwater. The relationship between ρ（ F^-）and p H value confirms that fluorine is easier to enrich in an alkaline and slight alkaline water.
出处
《湖南师范大学自然科学学报》
CAS
北大核心
2014年第6期7-12,共6页
Journal of Natural Science of Hunan Normal University
基金
中国地质调查局地质调查资助项目(1212010634505)
关键词
高氟水
浅层地下水
分布特征
影响因素
high-fluorine water
shallow groundwater
distribution feature
influence factor
