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Open AccessFeature PaperArticle

Nanostructured Cellulose-Based Sorbent Materials for Water Decontamination from Organic Dyes

1
Department of Chemistry, Materials, and Chemical Engineering “G. Natta” and INSTM Local Unit, Politecnico di Milano, Piazza Leonardo da Vinci 32, I-20133 Milano, Italy
2
Department of Civil and Environmental Engineering, Politecnico di Milano, Piazza Leonardo da Vinci 32, I-20133 Milano, Italy
3
Centro Nazionale Ricerche (C. N. R.) Istituto di Chimica del Riconoscimento Molecolare (ICRM), 20131 Milan, Italy
*
Authors to whom correspondence should be addressed.
Nanomaterials 2020, 10(8), 1570; https://doi.org/10.3390/nano10081570
Received: 18 July 2020 / Revised: 30 July 2020 / Accepted: 5 August 2020 / Published: 10 August 2020
(This article belongs to the Special Issue Nanotechnology for Environmental and Biomedical Research)
Nanostructured materials have been recently proposed in the field of environmental remediation. The use of nanomaterials as building blocks for the design of nano-porous micro-dimensional systems is particularly promising since it can overcome the (eco-)toxicological risks associated with the use of nano-sized technologies. Following this approach, we report here the application of a nanostructured cellulose-based material as sorbent for effective removal of organic dyes from water. It consists of a micro- and nano-porous sponge-like system derived by thermal cross-linking among (2,2,6,6-Tetramethylpiperidin-1-yl)oxyl (TEMPO)-oxidized cellulose nanofibers (TOCNF), branched polyethylenimine 25 kDa (bPEI), and citric acid (CA). The sorbent efficiency was tested for four different organic dyes commonly used for fabric printing (Naphthol Blue Black, Orange II Sodium Salt, Brilliant Blue R, Cibacron Brilliant Yellow), by conducting both thermodynamic and kinetic studies. The material performance was compared with that of an activated carbon, commonly used for this application, in order to highlight the potentialities and limits of this biomass-based new material. The possibility of regeneration and reuse of the sorbent was also investigated. View Full-Text
Keywords: nanostructured materials; sorption; organic dyes; wastewater treatment; nanocellulose nanostructured materials; sorption; organic dyes; wastewater treatment; nanocellulose
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MDPI and ACS Style

Riva, L.; Pastori, N.; Panozzo, A.; Antonelli, M.; Punta, C. Nanostructured Cellulose-Based Sorbent Materials for Water Decontamination from Organic Dyes. Nanomaterials 2020, 10, 1570.

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