Facile fabrication of magnetic carboxymethyl starch/poly(vinyl alcohol) composite gel for methylene blue removal

被引：70
作者：
Gong, Guisheng [1 ,2 ]
Zhang, Faai [1 ,2 ]
Cheng, Zehong [1 ,2 ]
Zhou, Li [1 ,2 ]
机构：
[1] Guilin Univ Technol, Guangxi Minist Prov Jointly Constructed Cultivat, Key Lab New Proc Technol Nonferrous Met & Mat, Minist Educ, Guilin 541004, Peoples R China
[2] Guilin Univ Technol, Coll Mat Sci & Engn, Guilin 541004, Peoples R China
来源：
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES | 2015年 / 81卷
关键词：
Magnetic composite gel; Carboxymethyl starch; Dye adsorption; WASTE-WATER TREATMENT; AQUEOUS-SOLUTION; ACTIVATED CARBON; DYE ADSORPTION; ENHANCED ADSORPTION; ORGANIC-DYES; STARCH; KINETICS; BEADS; THERMODYNAMICS;
D O I：
10.1016/j.ijbiomac.2015.07.061
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
This study presents a simple method to fabricate magnetic carboxymethyl starch/poly(vinyl alcohol) (mCMS/PVA) composite gel. The obtained mCMS/PVA was characterized by Fourier transform infrared (FTIR) spectra, vibrating-sample magnetometer (VSM) and scanning electron microscopy (SEM) measurements. The application of mCMS/PVA as an adsorbent for removal of cationic methylene blue (MB) dye from water was investigated. Benefiting from the combined merits of carboxymethyl starch and magnetic gel, the mCMS/PVA simultaneously exhibited excellent adsorption property toward MB and convenient magnetic separation capability. The effects of initial dye concentration, contact time, pH and ionic strength on the adsorption performance of mCMS/PVA adsorbent were investigated systematically. The adsorption process of mCMS/PVA for MB fitted pseudo-second-order model and Freundlich isotherm. Moreover, desorption experiments revealed that the mCMS/PVA adsorbent could be well regenerated in ethanol solution without obvious compromise of removal efficiency even after eight cycles of desorption/adsorption. Considering the facile fabrication process and robust adsorption performance, the mCMS/PVA composite gel has great potential as a low cost adsorbent for environmental decontamination. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：205 / 211
页数：7
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