新疆喀什噶尔河流域高氟地下水富集因素分析

The Enrichment Factors of High Fluoride Groundwater in the Kashgar River Basin,Xinjiang

以新疆喀什噶尔河流域地下水中的氟为研究对象,依据地下水污染调查数据,分析研究区地下水中氟的富集因素。研究结果表明,地下水主导阴离子为SO42-和Cl-,主导阳离子为Na^+和Ca^2+,水化学类型以SO4·Cl型和Cl·SO4型水为主。地形及水文地质条件是影响浅层地下水中氟富集的主要外在因素,水文地质条件是影响深层地下水的主要外在因素。水化学环境也是影响地下水中F-富集的重要因素,地下水的弱碱性环境对F-含量具有一定的富集作用,同时,高TDS、高TH、高Cl^-、高HCO3^-、高Ca^2+和高Na^+均有利于F^-的富集。

For the groundwater pollution survey data,this paper took the fluoride of groundwater as the research object in the Kashgar River Basin of Xinjiang,and analyzed the enrichment factors of fluoride in groundwater.The results showed that the dominant anions of groundwater were SO4^2-and Cl^-,the dominant cations were Na^+and Ca^2+,and the groundwater chemical type was dominated by SO4·Cl type and Cl·SO4 type.The topography and hydrogeological condition were the main external factors affecting fluorine enrichment in shallow groundwater,and the hydrogeological condition was the main external factors affecting deep groundwater.The groundwater chemical environment was also an important factor affecting the enrichment of fluoride in groundwater.The weak alkaline environment of groundwater had a certain enrichment effect on fluoride content.At the same time,the high total dissolved solids,high total hardness,high chlorine,high bicarbonate,high calcium andhigh sodiumwere beneficial to the enrichment of fluoride.