Open AccessCitric acid functionalized cellulose monolith for continuous‐flow removal of cationic dye in water
Author(s) -
Xie Zhengtian,
Li Linxuan,
Hsu YuI,
Asoh TakaAki,
Uyama Hiroshi
Publication year - 2022
Publication title -
nano select
Language(s) - English
Resource type - Journals
ISSN - 2688-4011
DOI - 10.1002/nano.202100185
Subject(s) - cationic polymerization , citric acid , monolith , cellulose , adsorption , methylene blue , chemical engineering , desorption , materials science , chemistry , surface modification , catalysis , organic chemistry , photocatalysis , engineering
Developing efficient yet cost‐effective material from bioresources for dye removal is promising in both economic and environmental protection aspects. Here, a monolithic cellulose material functionalized with citric acid is reported as an absorbent for continuous‐flow removal of cationic dye. The functionalization process is realized by a direct esterification reaction between citric acid and cellulose without any other additions. The obtained monolithic absorbent possesses a 3D connected porous structure, which enables the application of the product in a continuous‐flow fashion. Results indicate that the produced monolith has a good adsorption ability to methylene blue. Moreover, the product can be reused after a fast desorption process by flowing with a salt solution. This work provides a simple strategy for fabricating green absorbents based on biofriendly cellulose and citric acid, which exhibits a potential of industrial application for water treatment.