Renewable magnetic alginate-graphene oxide hybrid for efficient cationic dye removal

被引：2
作者：
Liu, Wenju [1 ]
Bai, Hongjuan [1 ]
Gao, Weiqiang [1 ]
Chen, Zihan [1 ]
Liu, Zhuangzhuang [1 ]
Chen, Zilong [1 ]
Chen, Junhang [1 ]
机构：
[1] Henan Univ Technol, Sch Chem & Chem Engn, Zhengzhou 450001, Peoples R China
来源：
KOREAN JOURNAL OF CHEMICAL ENGINEERING | 2022年 / 39卷 / 10期
基金：
中国国家自然科学基金;
关键词：
Graphene Oxide; Alginate; Adsorption; Cationic Dye; Magnetic Separation; METHYLENE-BLUE ADSORPTION; AQUEOUS-SOLUTION; SIMULTANEOUS CAPTURE; ACTIVATED CARBON; MALACHITE GREEN; ORGANIC-DYES; COMPOSITE; BEADS; NANOCOMPOSITES; ADSORBENT;
D O I：
10.1007/s11814-022-1143-y
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A batch system was applied to investigate the behavior of adsorption of methylene blue (MB) and crystal violet (CV) from aqueous solution using a renewable magnetic alginate composite containing graphene oxide (M-GO/Alg) in single and binary systems. The surface morphology and chemical structure of the adsorbent were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), thermogravimetric analysis (TGA), and vibrating sample magnetometer (VSM) analysis. The experimental data were fitted by the isotherm models and adsorption kinetics. And the maximum adsorption quantity of MB and CV reached 459.85 and 69.46 mg/g at 298 K for M-GO/Alg, respectively, as deduced from Langmuir model. After five successive adsorptive removal cycles for both dyes, no significant performance loss was observed for M-GO/Alg. Moreover, M-GO/Alg was easily separated under an external magnetic field. In binary system, MB and CV exhibited competitive adsorption. The obtained results suggested that M-GO/Alg can be used as an eco-friendly and recyclable adsorbent to remove cationic dyes from aqueous solutions.
引用
收藏
页码：2792 / 2799
页数：8
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