摘要
研究了浙江、吉林等地几种国内硅藻土的表面ζ电位与ｐＨ的关系曲线，测定了它们的等电点。其中吉林土等电点最小，表面酸强度最大。在所试条件下，浙江土和吉林土随着焙烧温度升高，等电点值增大，尿激酶吸附量随酸浓度增大而逐渐减小。而浙江土和酸洗浙江土在４００℃时等电点最小，酸浓度最大，吉林土在４００℃时比表面最大，三者对尿激酶吸附量也最大。酸洗后，浙江土等电点值增大，酸浓度则减小，尿激酶吸附量也相应减小。
In this paper, the curves of surface ζ potential versus pH for Zhejiang, Jilin and other several local diatomites were studied, and their isoelectrical point(IEP) values were determined. Among them, the acid strength of Jilin diatomite surface attained maximum value and IEP minimum, their acid strengths were concerned with the structure of diatom frustules. Under the experiment conditions, IEP value of Zhejiang and Jilin diatomite increased with roasting temperature, so that the capacity of adsorption of urokinase increased gradually according to the surface acid strength. When diatomite roasted at 400℃ their acid strength attained maximum value and IEP minimum, only did specific surface of Jilin diatomite attained maximum value, so their capacity of adsorption of urokinase attained maximum value, after diatomite was washed with acid, its IEP value increased, and acid strength decreased, the capacity of adsorption of urokinase also decreased accordingly.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
1997年第1期11-15,共5页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金
关键词
等电点
酸强度
硅藻土
尿激酶
isoelectrical point acid strength diatomite urokinase
