The Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi'an University of Technology, Xi'an Shanxi 710048, People's Republic of China.
The Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi'an University of Technology, Xi'an Shanxi 710048, People's Republic of China.
Carbohydr Polym. 2021 Feb 15;254:117473. doi: 10.1016/j.carbpol.2020.117473. Epub 2020 Dec 2.
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.
为了有效且有选择性地去除大量排放的有毒阴离子染料并促进其回收，我们通过一种简单的方法精心设计了一种可持续的纤维素纳米纤维/壳聚糖（CNF/CS）复合膜。基于 CNF 的强大支撑作用以及 CNF 和 CS 之间的优异相容性，复合膜具有低溶胀和耐酸特性，可以防止吸附剂的分解破坏吸附过程。此外，CNF/CS 膜的正电性增加了阴离子和阳离子染料吸附容量之间的差异。CNF/CS 膜对阴离子甲基橙（MO）的最大吸附容量达到 655.23mg/g，具有良好的可循环性。吸附行为归因于物理化学和单层吸附过程。这项工作为开发环保且高效的吸附剂开辟了新途径，可用于从废水中选择性去除和回收阴离子染料。
