EFFECT OF SINGLE-WALLED CARBON NANOTUBES ON THE ADSORPTION OF BASIC RED 12 DYE BY TRIMELLITIC ANHYDRIDE ISOTHIOCYANATE-CROSSLINKED CHITOSAN HYDROGEL

被引:10
作者
Al-Harby, Nouf F. [1 ]
Almarshed, Mawaheb S. [1 ]
Mohamed, Nadia A. [1 ,2 ]
机构
[1] Qassim Univ, Coll Sci, Dept Chem, Buraydah 51452, Saudi Arabia
[2] Cairo Univ, Dept Chem, Fac Sci, Giza 12613, Egypt
来源
CELLULOSE CHEMISTRY AND TECHNOLOGY | 2023年 / 57卷 / 3-4期
关键词
chitosan hydrogel/SWCNTs composite; Basic Red 12 dye; adsorption; kinetics; adsorption isotherms; adsorption thermodynamics; ANTIMICROBIAL ACTIVITY; AQUEOUS-SOLUTION; METHYLENE-BLUE; WASTE-WATER; REMOVAL; KINETICS; ISOTHERM; DERIVATIVES; ADSORBENT;
D O I
10.35812/CelluloseChemTechnol.2023.57.40
中图分类号
TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];
学科分类号
0805 ; 080502 ; 0822 ;
摘要
A chitosan hydrogel crosslinked with the least amount of trimellitic anhydride isothiocyanate (H-1) and filled with 0.6 wt% of single-walled carbon nanotubes (SWCNTs) (H-1/SWCNTs) was synthesized. Its structure was proven via Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) observations. The adsorption capacity of H-1/SWCNTs for Basic red 12 (BR 12) dye, at pH 7 and 25 degrees C, was 14.80 mg g(-1) with a percent removal efficiency of 37.66%, which was greater by 1.8 times than that of the parent hydrogel H-1 (8.21 mg g(-1) and 20.90%, respectively). Its sorption capacity slightly enhanced with decreasing adsorption solution pH. The optimum adsorption capacity of 15.62 mg g(-1) and the % removal efficiency of 39.76% were observed at pH 10 and 25 degrees C. The adsorption of BR 12 dye onto H-1/SWCNTs at different temperatures and different dye solution pH values fitted to the pseudo-second order and the intraparticle diffusion kinetic models. The adsorption isotherm for BR 12 dye by H-1/SWCNTs fitted to the Langmuir isotherm model, indicating the monolayer nature of adsorption. BR 12 dye adsorption onto H-1/SWCNTs is an exothermic process. Thus, the inclusion of SWCNTs into the matrices of functionalized chitosan hydrogel H1 improved its features. It is a suitable way to obtain a favorable composite with high-performance adsorbing characteristic for cationic dyes removal.
引用
收藏
页码:445 / 458
页数:14
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