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2 results on '"Xu, Hongping"'

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

Author

Hu D, Huang H, Jiang R, Wang N, Xu H, Wang YG, and Ouyang XK

Subjects
Adsorption, Diclofenac isolation & purification, Ethylenediamines, Wastewater chemistry, Water Pollutants, Chemical isolation & purification, Cellulose chemistry, Chitosan chemistry, Diclofenac chemistry, Nanoparticles chemistry, Water Pollutants, Chemical chemistry
Abstract

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., (Copyright © 2019 Elsevier B.V. All rights reserved.)

Published
2019
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2. Adsorption of diclofenac sodium on bilayer amino-functionalized cellulose nanocrystals/chitosan composite

Author

Wang Nan, Wang Yangguang, Xu Hongping, Ran Jiang, Haoyu Huang, Xiao-kun Ouyang, and Dalin Hu

Subjects
Diclofenac, Environmental Engineering, Health, Toxicology and Mutagenesis, 0211 other engineering and technologies, Infrared spectroscopy, Ionic bonding, Ethylenediamine, 02 engineering and technology, Wastewater, 010501 environmental sciences, 01 natural sciences, Chitosan, symbols.namesake, chemistry.chemical_compound, Adsorption, X-ray photoelectron spectroscopy, Environmental Chemistry, Cellulose, Waste Management and Disposal, 0105 earth and related environmental sciences, 021110 strategic, defence & security studies, Bilayer, Langmuir adsorption model, Ethylenediamines, Pollution, Chemical engineering, chemistry, symbols, Nanoparticles, Water Pollutants, Chemical
Abstract

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.

Published
2019

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