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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Compressible cellulose nanofibril (CNF) based aerogels produced via a bio-inspired strategy for heavy metal ion and dye removal

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Author(s):
Tang, Juntao [1] ; Song, Yang [2] ; Zhao, Feiping [3] ; Spinney, Stewart [2] ; Bernardes, Juliana da Silva [4] ; Tam, Kam Chiu [2]
Total Authors: 6
Affiliation:
[1] Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Hunan - Peoples R China
[2] Univ Waterloo, Waterloo Inst Nanotechnol, Dept Chem Engn, 200 Univ Ave West, Waterloo, ON N2L 3G1 - Canada
[3] Lappeenranta Univ Technol, Fac Technol, Dept Chem, Lab Green Chem, Sammonkatu 12, FI-50130 Mikkeli - Finland
[4] Brazilian Ctr Res Energy & Mat CNPEM, Brazilian Nanotechnol Natl Lab LNNano, BR-13083970 Sao Paulo - Brazil
Total Affiliations: 4
Document type: Journal article
Source: Carbohydrate Polymers; v. 208, p. 404-412, MAR 15 2019.
Web of Science Citations: 11
Abstract

A sustainable nanomaterial, cellulose nanofibril (CNF) was used to prepare aerogel sorbents to remove various contaminants in wastewater. A mussel-inspired coating strategy was used to introduce polydopamine onto the surface of CNFs, which were cross-linked with polyethylenimine (PEI) to form the aerogels. The synthetic procedure was optimized to achieve a minimal consumption of raw materials to produce a robust porous structure. The aerogels possessed a low density (25.0 mg/cm(3)), high porosity (98.5%) and shape recovery in air and water. Adsorption studies were conducted on two representative contaminants, Cu (II) and methyl orange (MO). The kinetic data obeyed the pseudo 2nd order kinetic model and the mechanism of adsorption could be described by the intra-particle diffusion model. The Langmuir model fitting yielded a maximum adsorption capacity of 103.5 mg/g and 265.9 mg/g for Cu (II) and MO, respectively. The effects of pH on the adsorption performance were evaluated, confirming that the aerogels can maintain a high adsorption capacity over a wide pH range. (AU)

FAPESP's process: 17/50133-8 - Gel behavior of cellulose nanofiber smart materials
Grantee:Juliana da Silva Bernardes
Support Opportunities: Regular Research Grants