Adsorption properties of cermet and track-etched poly(ethylene terephthalate) membranes

被引：0
|
作者：
Khataibe, EV
Khokhlova, TD
Trusov, LI
Mchedlishvili, BV
机构：
[1] Russian Acad Sci, AV Shubnikov Crystallog Inst, Moscow 117333, Russia
[2] Moscow MV Lomonosov State Univ, Dept Chem, Moscow 119992, Russia
[3] Assoc Adv Complex Technol ASPEKT, Moscow 103030, Russia
来源：
COLLOID JOURNAL | 2005年 / 67卷 / 01期
关键词：
Adsorption Capacity; Rhodamine; Adsorption Site; Terephthalate; Basic Protein;
D O I：
10.1007/s10595-005-0065-9
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 adsorption properties of cermet and track-etched poly(ethylene terephthalate) (PET-TM) membranes are compared with respect to proteins and water-soluble dyes. It is shown that the cermet membranes have a noticeably higher adsorption capacity (calculated per unit surface area) than the PET-TM. In this case, the character of adsorption of these substances on both types of membranes is quite similar and determined by the combination of ionic and hydrophobic interactions. The adsorption values of basic dyes are considerably higher than acid one because of the negative charge at the membrane surfaces. The isotherm of adsorption of the basic dye rhodamine 6G on PET-TM from aqueous solution is characterized by the inflection in the concentration range of lower than 1 mumol/1 due to the presence of highly active adsorption sites on the surface. The adsorption of dyes considerably lowers on adding isopropanol to the aqueous solution. Using basic protein cytochrome C as an example, it is established that its adsorption on cermet membranes can be prevented by increasing solution ionic strength.
引用
收藏
页码：113 / 116
页数：4
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