Evaluating molecular weight of PVP on characteristics of CTA membrane dialysis

被引:23
作者
Bensaadi, S. [1 ,2 ]
Arous, O. [1 ]
Kerdjoudj, H. [1 ]
Amara, M. [1 ]
机构
[1] USTHB, Fac Chem, Lab Hydromet & Mol Inorgan Chem, POB 32 El Alia, Algiers 16111, Algeria
[2] Ctr Res Phys & Chem Anal, POB 248, Algiers 16004, Algeria
来源
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING | 2016年 / 4卷 / 02期
关键词
Dialysis; Cations; Membrane; Polymer; Polyvinylpyrrolidone; Cellulose triacetate;
D O I
10.1016/j.jece.2016.02.003
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The polymer inclusion membranes used for the selective transport and separation of metal species have emerged in recent years. Their development depends on the method of preparation and the study of their intimate structure. In this work, we have developed a novel class of cellulose triacetate (CTA) membranes modified by poly-electrolytes incorporation that are selectively permeable to metallic ions. The effect of molecular weight of Polyvinylpyrrolidone (PVP) as additive on morphology and transport performance of (CTA) membrane was studied in this work. Diverse CTA membranes have been developed. PVP at different molecular weight (10,000, 24,000 and 40,000) was noted, respectively, (PVPk10, PVPk25 and PVPk30) and Polyethylene glycol (PEG (2000)) were used to modify the morphology and performance of membranes based CTA. The membranes have been prepared by dissolving amounts of CTA, PVP and PEG in Chloroform. The films obtained after solvent evaporation were characterized by thermogravimetric analysis (TGA), Fourier Transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). It was found that the degradation of the membranes is done in two steps. The first one starts at 250 degrees C due to thermal degradation of the polymeric chains. The SEM image shows that the porosity decreases with increasing of molecular weight of PVP. The influence of the molecular weight of PVP in performance of membranes was examined by application of dialysis process using cations solution containing Cd2+, Cu2+, Ni2+ and Zn2+. The membrane containing PVPk10 showed better efficiency compared to the other ones. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1545 / 1554
页数:10
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