Synthesis of CarAlg/MMt nanocomposite hydrogels and adsorption of cationic crystal violet

被引：141
作者：
Mahdavinia, Gholam Reza [1 ]
Aghaie, Huriyeh [2 ]
Sheykhloie, Hossein [3 ]
Vardini, Mohammad Taghi [2 ]
Etemadi, Hossein [1 ]
机构：
[1] Univ Maragheh, Fac Sci, Dept Chem, Maragheh, Iran
[2] Islamic Azad Univ, Tabriz Branch, Fac Sci, Dept Appl Chem, Tabriz, Iran
[3] Islamic Azad Univ, Maragheh Branch, Fac Sci, Dept Chem, Maragheh, Iran
来源：
CARBOHYDRATE POLYMERS | 2013年 / 98卷 / 01期
关键词：
kappa-Carrageenan; Sodium alginate; Nanocomposite; Hydrogel; Adsorption; AQUEOUS-SOLUTION; SODIUM MONTMORILLONITE; COMPOSITE HYDROGELS; METHYLENE-BLUE; DYE REMOVAL; CARRAGEENAN; BEADS; CHITOSAN; ADSORBENTS;
D O I：
10.1016/j.carbpol.2013.05.096
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
CarAlg/MMt nanocomposite hydrogels composed of kappa-carrageenan (Car) and sodium alginate (Alg) biopolymers were synthesized by incorporation of sodium montmorillonite (Na-MMt) nanoclay. Acrylamide (AAm), methylenebisacrylamide (MBA), and ammonium persulfate (APS) were used as monomer, crosslinker, and initiator, respectively. The structure and morphology of nanocomposites were characterized by XRD, SEM, and TEM techniques. The XRD results showed exfoliated MMt nanoclay and exfoliation of MMt was confirmed by TEM graph. The resulting nanocomposites were evaluated to remove cationic crystal violet (CV) dye from water. According to data, the adsorption capacity of nanocomposites was enhanced as the clay content was increased. The experimental data were analyzed according to both Langmuir and Freundlich models and experimental maximum adsorption capacity was obtained 88.8 mg g(-1). By studying the effect of pH on the dye adsorption capacity of nanocomposites, it was revealed that the adsorption capacity of nanocomposites was enhanced at acidic pHs as the Na-MMt nanoclay and kappa-carrageenan components were increased. (C) 2013 Elsevier Ltd. All rights reserved.
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收藏
页码：358 / 365
页数：8
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