The Plastiverse Extends to Hydrogeologic Systems: Microplastics Are an Important Emerging Groundwater Contaminant Class

Divine, Craig; Killingstad, Marc; Mortensen, Linda; Beciragic, Alma; Dettmer, Adam; Alspach, Brent

doi:10.1111/gwmr.12633

Groundwater Monitoring Rem

2024

DOI: 10.1111/gwmr.12633

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The Plastiverse Extends to Hydrogeologic Systems: Microplastics Are an Important Emerging Groundwater Contaminant Class

Craig Divine,

Marc Killingstad,

Linda Mortensen

et al.

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2024

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Action of Low-Density Polyethylene Microspheres in the Transport of Metformin Hydrochloride in Aqueous Medium Through Adsorption and Desorption

Guimarães,

Cuba,

Teran

2024

Water

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The present study addresses the issue of transporting pharmaceuticals via microplastics in aquatic environments. For this purpose, the adsorption and desorption of metformin hydrochloride (MET), a hydrophilic compound, on polyethylene microspheres (PMEs) were studied via batch adsorption and desorption capacity and kinetics tests. The adsorption test results indicated minimal influence of pH values above 5, alongside a decrease in adsorption capacity with an increasing mass of PMEs. The Freundlich model best represented the adsorption capacity data; however, values of n < 1 (0.6) and low K suggest a decrease in the sorption affinity of MET with increasing initial MET concentration and a low affinity of MET for PM beads. The rate and equilibrium of adsorption were fast, and the results adequately fit the pseudo-first- and pseudo-second-order models, suggesting that physical and chemical mechanisms contributed to the adsorption of MET onto the PEMs under the conditions of this study. The desorption equilibrium result was 1.3 mg g−1 ± 0.04 mg g−1, without significant change, regardless of the initial amount of adsorbed MET. However, the desorption percentage varied between 26.14% and 7.01% as a function of the amount. of MET adsorbed onto the PMEs. These results suggest that PMEs could be potential vectors of MET transport in aquatic environments.

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Action of Low-Density Polyethylene Microspheres in the Transport of Metformin Hydrochloride in Aqueous Medium Through Adsorption and Desorption

Guimarães,

Cuba,

Teran

2024

Water

View full text Add to dashboard Cite

show abstract

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The Plastiverse Extends to Hydrogeologic Systems: Microplastics Are an Important Emerging Groundwater Contaminant Class

Cited by 1 publication

References 192 publications

Action of Low-Density Polyethylene Microspheres in the Transport of Metformin Hydrochloride in Aqueous Medium Through Adsorption and Desorption

Action of Low-Density Polyethylene Microspheres in the Transport of Metformin Hydrochloride in Aqueous Medium Through Adsorption and Desorption

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