REVERSAL OF BUBBLE CHARGE IN MULTIVALENT INORGANIC SALT-SOLUTIONS - EFFECT OF MAGNESIUM

被引：170

作者：

LI, C ^{[1
]}

SOMASUNDARAN, P ^{[1
]}

机构：

[1] COLUMBIA UNIV,HENRY KRUMB SCH MINES,SCH ENGN,LANGMUIR CTR COLLOIDS & INTERFACES,NEW YORK,NY 10027

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 1991年 / 146卷 / 01期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0021-9797(91)90018-4

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：

An experimental technique has been developed to study the electrokinetic behavior of gas bubbles in aqueous electrolyte solutions. It was found that bubbles are negatively charged in NaCl solutions whereas, under certain conditions, they become positively charged in MgCl2 solutions. The observed charge reversal in the pH range of 9 to 11 is attributed to the precipitation of Mg(OH)2(s) at the gas-liquid interface while the reduction in the magnitude of the zeta potential of the bubble observed in the acidic pH range is considered to be due to the specific adsorption of Mg+2. © 1991.

引用

页码：215 / 218

页数：4

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