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Triclosan Sorbs Highly on Microplastics
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This study investigated the sorption of triclosan, an antimicrobial endocrine-disrupting compound, onto various types of microplastics in aquatic environments. The results showed that triclosan binds readily to microplastics, demonstrating that plastic particles can act as vectors concentrating this contaminant in water bodies.
Microplastic (MP) release has been drastically increased in the aquatic environment, and they may act as vectors for organic contaminants (OCs) so MP/OC interaction is of concern. Triclosan (TCS) is an endocrine disruptor and bio-accumulative organic chemical used as an antimicrobial agent. This study investigates sorption of TCS by polyethylene (PE) type of MPs in aqueous solutions. Characterization of MPs is carried out via FTIR, BET, DSC and pHZC. Isotherm studies indicate a linear sorption trend, owing to the hydrophobic characteristics of TCS. In batch experiments, it is observed that there is an inverse relationship between sorption capacity and MP amount. The maximum equilibrium sorption capacity obtained is 6922 mu g/g. While particle size was unimportant, pH was very influential for sorption, enabling mechanistic assessments to be made. Overall, results showed a similar trend to the previously reported literature results regarding sorption capacity and pH effect, but not with particle size.
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