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Occurrence of microplastics and phthalate esters in urban runoff: A focus on the Persian Gulf coastline

The Science of The Total Environment 2021 163 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count.
Shamim Hajiouni, Azam Mohammadi, Bahman Ramavandi, Hossein Arfaeinia, Gabriel Enrique De-la-Torre, Agnes Tekle‐Röttering, Sina Dobaradaran

Summary

Researchers reported the first measurements of microplastics and phthalate esters in urban runoff along the Persian Gulf coastline in Bushehr, Iran, identifying urban stormwater as an important but understudied pathway for transferring these pollutants to the marine environment.

Urban runoff seems an obvious pathway for the transfer of microplastics (MPs) and phthalate acid esters (PAEs) from land-based sources to the marine environment; an issue that still lacks attention. This study presents the first results on MP and PAE levels in the urban runoff into the northern part of the Persian Gulf during the dry season. Average concentrations of MPs and PAEs in the urban runoff of eight selected sampling sites (N = 72) along the Bushehr coast were 1.86 items/L and 53.57 μg/L, respectively. MPs with a size range of 500-1000 μm had the highest abundance, and the mean levels of PAEs in MPs were 99.77 μg/g. The results of this study show that urban runoff is a main source of MP and PAE contaminants that are discharged into the Persian Gulf. Therefore, to decrease these pollutants from entering the aquatic environment, decision-makers in the area should consider this problem and stop the direct discharging of urban runoff into water bodies.

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