High ionic strength electrokinetics

被引：66

作者：

Kosmulski, M

Rosenholm, JB

机构：

[1] Tech Univ Lublin, Dept Electrochem, PL-20618 Lublin, Poland

[2] Abo Akad Univ, Dept Chem Phys, FIN-20500 Turku, Finland

来源：

ADVANCES IN COLLOID AND INTERFACE SCIENCE | 2004年 / 112卷 / 1-3期

关键词：

isoelectric point; zeta potential; electric sonic amplitude; colloid vibration current; concentrated electrolyte solutions;

D O I：

10.1016/j.cis.2004.09.005

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The electrokinetic potentials at high ionic strengths can be measured by means of electroacoustic method. The reported values are surprisingly high: up to 25 mV in 1 mol dm(-3) 1:1 electrolyte solution. The IEP of metal oxides in concentrated solutions of 1:1 electrolytes shifts to substantially higher pH values with respect to the pristine value, although these electrolytes are inert at low concentration. The shift in the IEP is salt-specific, and it is correlated with the hard-soft character of the anion and of the cation. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：93 / 107

页数：15

共 60 条

[1]

ALEXEEV OL, 1988, COLLOID J USSR, V50, P211

[2]

BREEUWSMA A, 1971, DISCUSS FARADAY SOC, P324

[3] Dielectric relaxation of aqueous NaCl solutions [J].