Facile synthesis of chitosan-based acid-resistant composite films for efficient selective adsorption properties towards anionic dyes. (15th February 2021)

• Record Type: Journal Article
• Authors: Huo, Mei-Xia; Jin, Yan-Ling; Sun, Zhen-Feng; Ren, Fang; Pei, Lu; Ren, Peng-Gang
• Is Part Of: Carbohydrate polymers. Volume 254(2021)
• Publication Date: 2021-02-15
• Subjects: Cellulose nanofiber -- Chitosan -- Acid resistance -- Anionic dye -- Selective adsorption; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2020.117473
• Languages: English
• ISSNs: 0144-8617

Abstract

Highlights: Proposing a new perspective of CS use in dyes selective and effective removal. Constructing water- and acid-stablility composite film with simple physical modification. Elucidating the mechanism of adsorption performance by CNF/CS films. Abstract: To effectively and selectively remove toxic anionic dyes which are heavily discharged and to promote them recovery, a sustainable cellulose nanofiber/chitosan (CNF/CS) composite film was elaborately designed through a facile procedure. Based on the strong supporting effect of CNF and excellent compatibility between CNF and CS, the composite film presents low swelling and acid-proof properties, which can prevent the adsorption process from the disintegration of adsorbent. Moreover, the positive electrical property of CNF/CS film increases the discrepancy in adsorption capacities for anionic and cationic dyes. The maximum adsorption capacity of anionic methyl orange (MO) on CNF/CS film reaches 655.23 mg/g with a desirable recyclability. The adsorption behavior attributed to a physico-chemical and monolayer adsorption process. This work opens a new route for the development of eco-friendly and highly efficient adsorbents on selective removal and recycling of anionic dyes from wastewater.