摘要
以研究区高氟、高砷地下水化学指标统计数据为基础,选取25组数据,分析了氟、砷浓度的水化学影响因素,结果表明:HCO3-浓度高的碱性环境中氟、砷浓度较高;随着Na/(Cl+SO4)比值的增加,氟离子浓度也呈增加趋势;地下水中氟、砷浓度高的区域TDS含量也较高,反映出地质环境背景为苏打化地区。对比As3+与As5+的含量分布,分析As3+与∑As散点图,得到含水层中As3+与As5+的分布规律,即高砷水集中在承压含水层,含水层中超标砷离子主要为As5+。
Based on the statistical data of hydrochemical indexes of high-fluorine and high-arsenic groundwater in the study area, 25 groups of data were selected to identify the hydrochemical impact factors on the fluorine and arsenic concentrations. The resuits showed that fluorine and arsenic concentrations are high in the alkaline environment with high HCO3- concentration, fluoride concentration increases with the increasing of Na /（C1 ＋ SO4 ）ratio, and TDS in high-fluorine and high-arsenic groundwater is also high, indicating the soda process of the geological setting in the study area. Compared with the concentration distributions of As^3＋ and As^5＋ , the analysis of As^3＋ and ∑As scatterplot showed the distribution As^3＋ and As^5＋ in groundwater,which suggested that high-arsenic water is mainly in the confined aquifer and the main over-standard arsenic ion is As5^＋ .
出处
《南水北调与水利科技》
CAS
CSCD
北大核心
2015年第3期553-556,共4页
South-to-North Water Transfers and Water Science & Technology
基金
中国地质调查局国土资源大调查项目"东北地方病严重区地下水勘查及供水安全示范工程"(1212010634701)
关键词
高氟水
高砷水
地下水化学
松嫩平原
high-fluorine water
high-arsenic water
groundwater chemistry
Songnen Plain
