摘要
以新疆喀什地区巴楚县平原区浅层地下水为研究对象,依据浅层地下水调查数据,分析浅层地下水中氟的分布特征及影响因素.研究区潜水和浅层承压水中氟的含量变化范围分别为0.14-4.61 mg·L^(-1)和0.02-2.00 mg·L^(-1),超标率分别为59.4%和38.2%;高氟浅层地下水在水平方向上主要分布在东南部以及西南部,在垂直分布上表现为潜水大于浅层承压水.浅层地下水中F-主要受气候、地形、水化学条件的影响;地下水化学环境处于弱碱性时易出现高氟地下水.运用PHREEQC软件计算地下水中各矿物的饱和指数,结果表明浅层地下水中F-主要来源于萤石的溶解;Gibbs图解法结果表明,岩石风化作用及蒸发作用对浅层地下水化学组分起主要影响作用;氯碱指数计算结果表明,阳离子之间的交换作用对浅层承压水中F-的富集起抑制作用.
Based on the investigation data of groundwater, the distribution characteristics and influencing factors of fluorine in shallow groundwater of Bachu County in Kashgar Prefecture,Xinjiang were analyzed. The main conclusions were as follows: the variation range of fluorine content in the unconfined groundwater and shallow confined groundwater was 0.14-4.61 mg·L^(-1) and 0.02-2.00 mg·L^(-1), and the over standard rate was 59.4% and 38.2%. In the horizontal distribution, the high-fluorine groundwater was mainly distributed in the southeast and southwest part. In the vertical distribution, fluorine content in the unconfined groundwater was greater than the shallow confined groundwater. Groundwater fluoride was mainly affected by climate, topography and hydrochemical conditions. High-fluorine groundwater occurred when the groundwater hydrochemical environment was weakly alkaline. PHREEQC software was used to calculate the saturation index(SI) of various minerals in groundwater, it showed that groundwater fluorine mainly derived from the dissolution of fluorite. Gibbs diagram method showed that the weathering and evaporation of rocks were the main effects on groundwater chemical composition. The results of the Chlor-alkaline index showed that the exchange of cations inhibited the accumulation of fluoride in shallow confined water.
作者
鲁涵
曾妍妍
周金龙
余东
孙英
LU Han;ZENG Yanyan;ZHOU Jinlong;YU Dong;SUN Ying(College of Water Conservancy and Civil Engineering,Xinjiang Agricultural University,Urumqi,830052,China;Xinjiang Hydrology and Water Resources Engineering Research Center,Urumqi,830052,China)
出处
《环境化学》
CAS
CSCD
北大核心
2021年第11期3455-3463,共9页
Environmental Chemistry
基金
新疆自治区自然科学基金(2019D01B18)
新疆自治区高校科研计划项目(XJEDU2018Y020)
新疆农业大学水利工程重点学科项目(SLXK2019-10)资助。
关键词
浅层地下水
氟的分布特征
影响因素
水文地球化学过程
新疆巴楚县
shallow groundwater
distribution characteristics of fluorine
influencing factors
hydrogeochemical process
Bachu County of Xinjiang
