立式电膜法测量土壤胶体粒子的ξ电位  

The Measure of ξ-potential of Soil Colloid Particles Using Vertical Electromembrane Method

作　　者：贾宏宇[1] 周启星[1] 孙铁珩[1] 李培军[1] PONOMAREV M I IVANENKO I B 

机构地区：[1]中国科学院沈阳应用生态研究所,沈阳110016 [2]Institute of Colloid Chemistryand Water Chemistry National Academy of Sciences

出　　处：《应用基础与工程科学学报》2001年第2期154-157,共4页Journal of Basic Science and Engineering

基　　金：中国科学院知识创新项目KZCX2 4 0 1;污染生态化学"百人计划"资助项目

摘　　要：在电膜组件中间加设网状膜 ,在外加电场作用下 ,胶体粒子发生电泳现象 ,通过测量胶体粒子浓度的变化可计算出胶体粒子的 ξ电位 .将装置改设为立式 ,可以大大减少胶体凝聚的发生 ,从而提高了电膜法测量 ξ电位的精度 ,扩大了适用范围 ,同时改进了具体的计算与测量方法 .该法对高岭土胶体 ξ电位的测量实验表明 ,立式电膜法测量 ξ电位可靠性较高。A diaphragm was installed in the module of electro me mbrane. The electrophoresis of colloid particles took place due to the action of electric fields. The ξ -potential can be calculated based on the changes o f colloid particles concentration. A vertical device could effectively reduce th e coagulation of colloid, and this the measure range of ξ -potential using electromembrane was extended measuring and calculating methods of ξ -potent ial was also improved in this paper. The experimental results of kaolinite ξ -potential measure showed that the high reliability and independence on large instruments would the main superiorities of this improved method.

关 键 词：胶体 Ζ电位 立式电膜法 土壤 电学性质 

分 类 号：S153.3[农业科学—土壤学]