酸碱、硬度组成对水^(17)O-NMR化学位移和半峰宽的影响及与水缔合作用的关系  

Effect of composition of acidity,alkalinity and hardness on chemical shift and line width of ^(17)O-NMR of water and their relation to water association

作　　者：李睿华[1] 蒋展鹏[1] 师绍琪[1] 杨宏伟[1] 

机构地区：[1]清华大学环境科学与工程系,北京100084

出　　处：《环境科学学报》2003年第3期396-399,共4页Acta Scientiae Circumstantiae

基　　金：清华大学基础研究基金;清华大学开放基金

摘　　要：pH、硬度是给水水质的重要指标 .随着对水质要求的提高 ,从微观结构上认识它们对水质的影响十分必要 .文中考察了温度、CaCl2 、MgCl2 、Mg(HCO3 ) 2 、HCl、NaOH等对水17O NMR化学位移和半峰宽的影响 ,分析了它们与水缔合的关系 .研究表明Ca2 + 、Mg2 + 、H+ 、OH-对水缔合有不同的影响 .具有同样水质指标的水 ,其组成不同 ,水的缔合结构不同 .Acidity, alkalinity and hardness are important indexes of water quality. It is necessary to sluely their effect on water quality from microstructure of water. The effect of temperature, CaCl\-2, MgCl\-2, Mg(HCO 3) 2, HCl, NaOH on Chemical shift and line-width of 17 O-NMR of water was investigated. The relationship of water association with Chemical shift and line-width of 17 O-NMR of water was addressed, The effects of Ca 2+ 、Mg 2+ 、H +、OH - on water association were analyzed. It was demonstrated that Ca 2+ 、Mg 2+ 、H +、OH - have different effect on water association. Water with the same indexes of water quality but different compositions have different water structures.

关 键 词：酸 碱 硬度 饮用水 化学位移 半峰宽 水缔合作用 核磁共振 氧17 水质分析 

分 类 号：TU991.21[建筑科学—市政工程]