Efficient removal of ethidium bromide from aqueous solutions using chromatin-loaded chitosan polyvinyl alcohol composites

In this work, a novel chromatin-loaded chitosan polyvinyl alcohol composite was developed as a simple, efficient and environmentally friendly adsorbent for the efficient removal of ethidium bromide (EtBr). SEM images showed that the composites were characterized by dense porous and uniformly distrib...

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Bibliographic Details
Published in:Environmental science and pollution research international 2024, Vol.31 (2), p.3276-3295
Main Authors: Jiang, Zhikang, Li, Junsheng, Huang, Guoxia, Yan, Liujuan, Ma, Ji
Format: Article
Language:English
Subjects:
Adsorption
Aquatic Pollution
Aqueous solutions
Atmospheric Protection/Air Quality Control/Air Pollution
Chitosan
Chromatin
Composite materials
Earth and Environmental Science
Ecotoxicology
Environment
Environmental Chemistry
Environmental Health
Ethidium bromide
Fluorescence
Fluorescence microscopy
Hydrogen bonding
Immobilization
Kinetics
Polyvinyl alcohol
Research Article
Waste Water Technology
Water Management
Water Pollution Control
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Summary:In this work, a novel chromatin-loaded chitosan polyvinyl alcohol composite was developed as a simple, efficient and environmentally friendly adsorbent for the efficient removal of ethidium bromide (EtBr). SEM images showed that the composites were characterized by dense porous and uniformly distributed morphology. The BET analysis showed the presence of mesopores and macropores in the composites. FTIR and XRD results showed that the chromatin was uniformly dispersed in the chitosan-polyvinyl alcohol carrier through hydrogen bonding. The fluorescence microscopy images showed the change of fluorescence effect before and after the adsorption of the material, which indicated that the chromatin was uniformly distributed in the composites and had a good adsorption effect. The optimal experimental conditions were T = 30℃, t = 120 min, pH = 7.4, m = 0.2 g when the composite with only 5% chromatin content had the ability to adsorb EtBr efficiently (minimum concentration 2 mg·L −1 : adsorption rate 99%; maximum concentration 20 mg·L −1 : adsorption rate 90%).The adsorption kinetics and thermodynamics showed that the EtBr adsorption kinetics of the composite conformed to the pseudo-second-order kinetic model (0.995 
ISSN:1614-7499
0944-1344
1614-7499
DOI:10.1007/s11356-023-31364-0