Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/90779
Title: Uncommon Sorption Mechanism of Aromatic Compounds onto Poly(Vinyl Alcohol)/Chitosan/Maleic Anhydride-β-Cyclodextrin Hydrogels
Authors: Filho, Cesar M C
Bueno, Pedro V A
Matsushita, Alan F Y
Vilsinski, Bruno H
Rubira, Adley F. 
Muniz, Edvani C. 
Murtinho, Dina Maria Bairrada 
Valente, Artur José Monteiro 
Keywords: Chitosan; Maleic anhydride; Monoaromatic hydrocarbons; Poly(vinyl alcohol); Polycyclic aromatic hydrocarbons; β-cyclodextrin
Issue Date: 10-Apr-2020
Publisher: MDPI
Project: UID/QUI/00313/2020 
ERA-NETWaterJPI/0006/2016 
REEQ/481/QUI/2006, 
RECI/QEQ-QFI/0168/2012 
CENTRO-07-CT62-FEDER-002012 
Serial title, monograph or event: Polymers
Volume: 12
Issue: 4
Abstract: Aromatic hydrocarbons are extensive environmental pollutants occurring in both water and air media, and their removal is a priority effort for a healthy environment. The use of adsorbents is among the several strategies used for the remediation of these compounds. In this paper, we aim the synthesis of an amphiphilic hydrogel with the potential for the simultaneous sorption of a set of monocyclic and polycyclic aromatic hydrocarbons associated with toxicity effects in humans. Thus, we start by the synthesis of a copolymer-based in chitosan and β-cyclodextrin previously functionalized with the maleic anhydride. The presence of β-cyclodextrin will confer the ability to interact with hydrophobic compounds. The resulting material is posteriorly incorporated in a cryogel of poly(vinyl alcohol) matrix. We aim to improve the amphiphilic ability of the hydrogel matrix. The obtained hydrogel was characterized by swelling water kinetics, thermogravimetric analysis, rheological measurements, and scanning electron microscopy. The sorption of aromatic hydrocarbons onto the gel is characterized by pseudo-first-order kinetics and Henry isotherm, suggesting a physisorption mechanism. The results show that the presence of maleic anhydride-β-cyclodextrin and chitosan into hydrogels leads to an increase in the removal efficiency of the aromatic compounds. Additionally, the capacity of this hydrogel for removing these pollutants from a fossil fuel sample has also been tested.
URI: http://hdl.handle.net/10316/90779
ISSN: 2073-4360
DOI: 10.3390/polym12040877
Rights: openAccess
Appears in Collections:I&D CQC - Artigos em Revistas Internacionais

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