Adsorption of diclofenac sodium on bilayer amino-functionalized cellulose nanocrystals/chitosan composite

被引：129

作者：

Hu, Dalin ^{[1
]}

Huang, Haoyu ^{[1
]}

Jiang, Ran ^{[1
]}

Wang, Nan ^{[2
]}

Xu, Hongping ^{[2
]}

Wang, Yang-Guang ^{[2
]}

Ouyang, Xiao-kun ^{[1
,2
]}

机构：

[1] Southern Med Univ, Sch Publ Hlth, Dept Environm Hlth, Guangdong Prov Key Lab Trop Dis Res, 1838 Guangzhou Rd North, Guangzhou 510515, Guangdong, Peoples R China

[2] Zhejiang Ocean Univ, Sch Food & Pharm, Zhoushan 316022, Peoples R China

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2019年 / 369卷

基金：

中国国家自然科学基金;

关键词：

Diclofenac sodium; Chitosan; Cellulose nanocrystals; Amino-Functional; PERSONAL CARE PRODUCTS; WASTE-WATER; SELECTIVE EXTRACTION; REMOVAL; PHARMACEUTICALS; SURFACE; FLUOROQUINOLONES; FABRICATION; ADSORBENT; GRAPHENE;

D O I：

10.1016/j.jhazmat.2019.02.057

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Residual diclofenac sodium (DS) in the environment is harmful to human health. A promising method for DS removal is the use of adsorbents functionalized with amino groups that can form an ionic bond with the carboxyl group of DS at a suitable pH. In this work, a novel composite adsorbent composed of cellulose nanocrystals (CNC) and chitosan (CS) has been synthesized and functionalized by ethylenediamine (ED) in both layers. Characterization methods, including scanning electron microscopy, transmission electron microscopy, energy dispersive X-ray spectroscopy, Fourier-transform infrared spectrometry, and X-ray photoelectron spectroscopy, were used to confirm the morphology and synthetic mechanism of the double- amino-functionalized adsorbent. Based on the optimization of adsorption conditions and modeling of the adsorption mechanism, the DS adsorption process on CNC-ED@CS-ED involves chemical adsorption, and the maximum adsorption capacity obtained from the Langmuir model is 444.44 mg/g. CNC-ED@CS-ED exhibits good adsorption capacity and high sustainability; thus, it is a promising composite material for the removal of DS from wastewater.

引用

页码：483 / 493

页数：11

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