摘要
氟含量高是沧州深层地下水水化学特征之一。为了反映沧州地区地下水资源量和揭示深层地下水氟的演变机制,本文分析了1980年和2014年沧州地区深层地下水中氟含量变化,研究了深层地下水中氟的分布特征和演化过程。具体使用ArcGIS和PHREEQC软件分别绘制沧州地区深层地下水氟的时空分布图和模拟氟的水文地球化学过程。结果表明沧州地区深层地下水氟浓度水平分布表现为西部最低,中西部和东部沿海次之,中部最高,且在2014年其面积增至约占沧州地区总面积的50%,可直接饮用地下水资源分布面积减少。深层地下水中氟离子浓度逐渐升高,仍来自萤石沿着水流路径、水流方向不断发生溶解反应,且从1980年到2014年仍未达到饱和。预计在深层地下水开采活动下,沧州深层地下水氟含量会继续增加。
Concentration of fluorine in deep groundwater in Cangzhou Area,China is high and restricts the utilization of deep groundwater.As a result,the distribution characteristics and development mechanism of fluorine in deep groundwater in Cangzhou Area were investigated in the years of 1980 and 2014by collecting data and field sampling.The software packages including ArcGIS and Phreeqc were used to obtain the temporal-spatial distribution characteristics and to simulate hydro-geochemical process of fluorine in deep groundwater.Results show that the concentration of fluorine in deep groundwater had increased from 1980 to 2014in Cangzhou Area.The concentration of fluorine in deep groundwater higher than 2mg/L distributed mainly in the middle of Changzhou Area,and those distribution areas accounted for about fifty percent of the whole Changzhou Area.The hydro-geochemical process simulation results show that the dissolution of fluorite is the main reason for increasing fluorite in deep groundwater in this area.
出处
《地球与环境》
CAS
CSCD
2015年第6期607-618,共12页
Earth and Environment
基金
国家环保公益项目(201309003)
国家重点基础研究发展计划项目(2010CB428801
2010CB428804)
关键词
深层地下水
氟
地球化学
沧州
deep groundwater
fluorine
geochemistry
Cangzhou
