
pmid: 40049276
Despite the increasing use of emerging phthalate and non-phthalate plasticisers as replacements for restricted phthalates, few studies have investigated their rates of entry and persistence in soils. We investigated release of the emerging plasticiser diethyl hexyl terephthalate (DEHTP) from polyvinyl chloride microplastics (PVC; 4 mm diameter; 21% DEHTP w/w) in soils in a 3-month laboratory study. DEHTP was released rapidly, with 6.6-12.1 ng DEHTP released per mg PVC within 100 days. Plasticiser half-lives in soils were significantly positively correlated with logKOW. Degradation was typically slower in acidic heathland (pH 3.8; organic matter 3.7%), than in alkaline grassland (pH 7.3; OM 16%) or sandy loam agricultural (pH 5.3; OM 5%) soils. Rapid release and potential persistence of some emerging plasticisers in soils indicates that presence of these contaminants may increase in the future.
leaching, Soil, Kinetics, Plasticizers, Diethylhexyl Phthalate, plasticiser, Phthalic Acids, Soil Pollutants, migration, microplastic, release, degradation, Half-Life
leaching, Soil, Kinetics, Plasticizers, Diethylhexyl Phthalate, plasticiser, Phthalic Acids, Soil Pollutants, migration, microplastic, release, degradation, Half-Life
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