Journal
CARBOHYDRATE POLYMERS
Volume 254, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2020.117473
Keywords
Cellulose nanofiber; Chitosan; Acid resistance; Anionic dye; Selective adsorption
Categories
Funding
- National Natural Science Foundation of P.R. China [51773167, 21706208]
- open project of State Key Laboratory of Polymer Materials Engineering [2020-4-21]
- Xianyang Science and Technology Research Project [2018k02-29]
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By synthesizing a sustainable cellulose nanofiber/chitosan composite film, the effective removal and recovery of toxic anionic dyes have been achieved, with properties such as low swelling and acid resistance, leading to efficient adsorption of anionic dyes.
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.
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