Adsorptive removal of anionic dyes from aqueous solutions using microgel based on nanocellulose and polyvinylamine

Bioresource Technology
Liqiang JinYongjian Xu

Abstract

A novel nanocomposite microgel based on nanocellulose and amphoteric polyvinylamine (PVAm) was fabricated via a two-step method. Firstly, cellulose nanocrystal was oxidized by sodium periodate to yield dialdehyde nanocellulose (DANC). DANC was then used as a crosslinker to react with PVAm to obtain a pH responsive microgel with high density of free amine groups. The microgel was characterized using FTIR, XRD, AFM and elemental analysis. AFM images revealed that the nanocomposite was microspherical particles with a diameter ranging from 200 to 300nm. The microgel was found to be effective in anionic dye removal at acidic conditions. The adsorption isotherms for congo red 4BS, acid red GR and reactive light yellow K-4G fit well with the Sips model, and the maximum adsorption capacities were 869.1mgg(-1), 1469.7mgg(-1) and 1250.9mgg(-1), respectively. The adsorption for these three anionic dyes all followed pseudo second order kinetics, indicating a chemisorption nature.

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Citations

Mar 25, 2017·Nanomaterials·Hugo VoisinAji P Mathew
Jun 14, 2017·Journal of Colloid and Interface Science·Magdalena Ptaszkowska-KoniarzRobert Pietrzak
Feb 14, 2020·Nanomaterials·Shahin Homaeigohar
Nov 24, 2017·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Hee-Jeong Choi
Aug 1, 2020·Frontiers in Chemistry·Luna LiangArthur J Ragauskas
Dec 9, 2020·Materials·Pierantonio De Luca, Jànos B Nagy
Feb 26, 2020·International Journal of Biological Macromolecules·A TshikovhiAjay K Mishra
May 25, 2021·International Journal of Biological Macromolecules·Ashvinder Kumar RanaVijay Kumar Thakur
May 19, 2021·Chemosphere·Reshmy RAshok Pandey
Jun 15, 2021·International Journal of Biological Macromolecules·Linlin CaoDonglei Wei
Jul 19, 2018·Biomacromolecules·Ragab E AbouzeidAlain Dufresne
Aug 24, 2021·Carbohydrate Polymers·Aihua QiaoRongxin Su

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