摘要
地下水化学组分形式的定量研究是水岩作用模拟计算的基础，本文系统地介绍了利用化学热力学平衡理论定量计算化学组分形式的理论与方法，并计算石家庄平原地下水中化学组分形式的分布，结果表明：构成地下水化学组分形式主要为络阴离子和单一离子，但ＣａＳＯ０４，ＭｇＳＯ０４ 和ＣａＣＨＯ＋３ 是地下水化学组成不可忽视的络合形式，这些络合组分随着ＴＤＳ和ＳＯ２－４ 总量的升高从上游到下游所占比例逐渐升高，络合形式的存在不仅对重新认识地下水的化学组成。
Chemical species calculation plays a fundamental part in modeling water\|rock interaction.The methods and theory for calculating species with chemical equilibrium model are introduced in the paper.With PHREEQE,chemical species are calculated for groundwater in Shijiazhuang Plain.The results shows that groundwater is chemically made up dominantly of simple ions and complex anions.However,the contents of major complexes,i.e.CaSO 0 4,MgSO 0 4 and CaHCO + 3,increase with TDS and total SO 2- 4 from upper reach to lower reach,and amount to 20% of total molality.These chemical species may have important hydrogeochemical significance in evaluating chemical composition of groundwater,and in studying the dissolution & precipitation of minerals and adsorption of some ions.
出处
《水文地质工程地质》
CAS
CSCD
1999年第6期48-51,共4页
Hydrogeology & Engineering Geology
基金
国家自然科学基金
关键词
组分形式
平衡计算
地下水
水化学意义
chemical species, chemical equilibrium calculation, ground water, Shijiazhuang Plain,hydrochemical signjificance.
