Assessing the sorption of pharmaceuticals to microplastics through in-situ experiments in New York City waterways

Adsorption of organic pollutants onto microplastics has been reported in prior studies, indicating the potential of these particles to serve as vectors of pollutants. Most prior investigations, however, have been conducted in laboratories under conditions with relatively little environmental relevan...

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Veröffentlicht in:The Science of the total environment 2020-08, Vol.729, p.138766-138766, Article 138766
Hauptverfasser: Magadini, Debra L., Goes, Joaquim I., Ortiz, Sarah, Lipscomb, John, Pitiranggon, Masha, Yan, Beizhan
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container_title The Science of the total environment
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creator Magadini, Debra L.
Goes, Joaquim I.
Ortiz, Sarah
Lipscomb, John
Pitiranggon, Masha
Yan, Beizhan
description Adsorption of organic pollutants onto microplastics has been reported in prior studies, indicating the potential of these particles to serve as vectors of pollutants. Most prior investigations, however, have been conducted in laboratories under conditions with relatively little environmental relevance. Here we report the results of in-situ experiments to investigate the adsorption of pharmaceuticals (atenolol, sulfamethoxazole, and ibuprofen) on to eight types of test materials (pellets from five types of widely-used polymers, small pieces of straws, fragments of bags, and glass beads for control). Three sample sets survived 28 days of deployment in New York City waterways. Concentrations of each analyte in water samples taken at these sites were also measured. Adsorption coefficients were calculated based on mass and surface area for each type. Mass-based coefficients showed much higher values for straw and bag samples than other types, consistent with their greater surface area to mass ratios. The surface area-based coefficients were similar among the plastic materials tested as well as the glass beads, indicating that surface area is a major determinant of the pharmaceutical adsorption, regardless of material type. Rapid biofouling, which was observed on all samples, appeared to be the predominant factor controlling the sorption capacity of the plastics. Our observations suggest that extensive biofouling and the formation of biofilms in nutrient-enriched waters can significantly impact the adsorption of pharmaceuticals onto plastics. [Display omitted] •In-situ microplastic sorption experiments conducted in NYC waterways•Higher level of pharmaceutics on locations close to WWTP discharge sites•Similar sorption coefficients of pharmaceutics among different plastics and glass•Rapid biofouling appeared to be the predominant factor controlling the sorption•High coefficients for plastic straws and bags due to large surface area
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subjects Adsorption
Biofilm
Microplastics
Microplastics - chemistry
New York City
Pharmaceuticals
Urban coastal waterways
Vectors
Water Pollutants, Chemical
title Assessing the sorption of pharmaceuticals to microplastics through in-situ experiments in New York City waterways
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