Trimethyl Chitosan/Siloxane-Hybrid Coated Fe3O4 Nanoparticles for the Uptake of Sulfamethoxazole from Water

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abstract

The presence of several organic contaminants in the environment and aquatic compartments has been a matter of great concern in the recent years. To tackle this problem, new sustainable and cost-effective technologies are needed. Herein we describe magnetic biosorbents prepared from trimethyl chitosan (TMC), which is a quaternary chitosan scarcely studied for environmental applications. Core@shell particles comprising a core of magnetite (Fe3O4) coated with TMC/siloxane hybrid shells (Fe3O4@SiO2/SiTMC) were successfully prepared using a simple one-step coating procedure. Adsorption tests were conducted to investigate the potential of the coated particles for the magnetically assisted removal of the antibiotic sulfamethoxazole (SMX) from aqueous solutions. It was found that TMC-based particles provide higher SMX adsorption capacity than the counterparts prepared using pristine chitosan. Therefore, the type of chemical modification introduced in the chitosan type precursors used in the surface coatings has a dominant effect on the sorption efficiency of the respective final magnetic nanosorbents.

keywords

WASTE-WATER; N,N,N-TRIMETHYL CHITOSAN; EMERGING POLLUTANTS; REMOVAL; ADSORPTION; PHARMACEUTICALS; MEMBRANES; TOXICITY; CHLORIDE; SPECTROSCOPY

subject category

Biochemistry & Molecular Biology; Chemistry

authors

Soares, SF; Fernandes, T; Trindade, T; Daniel-da-Silva, AL

our authors

foto Ana Luísa Daniel da Silva

Ana Luísa Daniel da Silva

Principal Researcher
foto João Tiago Moniz Fernandes

João Tiago Moniz Fernandes

PhD Student
foto Sofia Soares

Sofia Soares

Junior Researcher
foto Tito Trindade

Tito Trindade

Full professor

Groups

G1 - Porous Materials and Nanosystems

Projects

CICECO - Aveiro Institute of Materials (UID/CTM/50011/2019)

acknowledgements

This work was developed within the scope of the project CICECO-Aveiro Institute of Materials, Ref. UID/CTM/50011/2019, financed by National funds through the FCT/MCTES.

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Publication Details

type
Journal Article
year
2019
journal
MOLECULES
volume
24
article number
958
publisher
MDPI
issn
1420-3049
issue
10
digital object identifier
10.3390/molecules24101958
web of science article identifier
WOS:000470996600116

Journal Metrics (JCR 2019)

Journal Impact Factor
3.267
Journal Impact Factor (5 yrs)
3.589
category normalized journal percentile
56.714

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