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Effect of land use on microplastic pollution in a major boundary waterway: The Arvand River

The Science of The Total Environment 2022 84 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 50 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.
Naghmeh Soltani, Mohammad Javad Nematollahi, Mohammad Javad Nematollahi, Rosa Busquets Mohammad Javad Nematollahi, Mohammad Javad Nematollahi, Naghmeh Soltani, Naghmeh Soltani, Naghmeh Soltani, Mohammad Javad Nematollahi, Behnam Keshavarzi, Behnam Keshavarzi, Behnam Keshavarzi, Behnam Keshavarzi, Behnam Keshavarzi, Behnam Keshavarzi, Behnam Keshavarzi, Behnam Keshavarzi, Behnam Keshavarzi, Farid Moore, Rosa Busquets Mohammad Javad Nematollahi, Farid Moore, Farid Moore, Rosa Busquets Farid Moore, Rosa Busquets Farid Moore, Farid Moore, Rosa Busquets Rosa Busquets Farid Moore, Farid Moore, Farid Moore, Rosa Busquets Behnam Keshavarzi, Behnam Keshavarzi, Naghmeh Soltani, Behnam Keshavarzi, Behnam Keshavarzi, Behnam Keshavarzi, Behnam Keshavarzi, Behnam Keshavarzi, Behnam Keshavarzi, Behnam Keshavarzi, Behnam Keshavarzi, Behnam Keshavarzi, Behnam Keshavarzi, Behnam Keshavarzi, Behnam Keshavarzi, Farid Moore, Farid Moore, Farid Moore, Farid Moore, Farid Moore, Farid Moore, Farid Moore, Farid Moore, Farid Moore, Rosa Busquets Rosa Busquets Rosa Busquets Rosa Busquets Sylvie Gobert, Sylvie Gobert, Naghmeh Soltani, Behnam Keshavarzi, Behnam Keshavarzi, Behnam Keshavarzi, Behnam Keshavarzi, Behnam Keshavarzi, Behnam Keshavarzi, Farid Moore, Farid Moore, Behnam Keshavarzi, Naghmeh Soltani, Farid Moore, Rosa Busquets Rosa Busquets Rosa Busquets Farid Moore, Rosa Busquets Farid Moore, Farid Moore, Rosa Busquets Farid Moore, Rosa Busquets Rosa Busquets Rosa Busquets Rosa Busquets Rosa Busquets Mohammad Javad Nematollahi, Mohammad Javad Nematollahi, Mohammad Javad Nematollahi, Mohammad Javad Nematollahi, Rosa Busquets Rosa Busquets Rosa Busquets Naghmeh Soltani, Rosa Busquets Rosa Busquets Rosa Busquets Rosa Busquets Farid Moore, Rosa Busquets Farid Moore, Farid Moore, Rosa Busquets Rosa Busquets Rosa Busquets Rosa Busquets Rosa Busquets Sylvie Gobert, Naghmeh Soltani, Rosa Busquets Reza Javid, Mohammad Javad Nematollahi, Rosa Busquets Reza Javid, Rosa Busquets Sylvie Gobert, Sylvie Gobert, Reza Javid, Sylvie Gobert, Reza Javid, Rosa Busquets Rosa Busquets Sylvie Gobert, Rosa Busquets

Summary

Researchers conducted the first assessment of microplastic pollution in Iran's Arvand River, finding contamination levels varied with adjacent land use, with higher concentrations near urban and industrial areas in both water and sediment samples.

Study Type Environmental

The occurrence of microplastics (MPs) was investigated in the Arvand River (Iran). The Arvand River (200 Km) is a major water body that flows through land with diverse use and it meets the Persian Gulf. This study constitutes the first assessment of MP pollution (prevalence and physico-chemical characteristics) in the Arvand river, both in the sediment and in the water. MP monitoring has been carried out in 24 stations located along the river. The MP pollution found ranged between 1 and 291 items·L and 70 to 15,620 items·kg (dw), in water and sediment, respectively. The majority of MPs were fibres, black/grey and yellow/orange in colour, and mainly 250-500 μm and >1000 μm in size. Polyethylene terephthalate (PET), polypropylene (PP), nylon (NYL), high-density polyethylene (HDPE), and polystyrene (PS) were found in sediment samples. All these polymers, except HDPE, were also identified in the water samples. PET and PP were dominant in the water samples; whereas PET and PS were the most abundant in the sediments. The vicinity of urban wastewater effluents could be behind MP pollution in both water and sediments. Significant differences (p < 0.05) of MP concentrations were affected by different land uses when comparing MP levels in undisturbed natural area with urban areas. A strong correlation between MP fibres and fragments found with PCA biplots revealed their similar distribution in water. In the sediment samples, fibre and fragment MP particles were significantly correlated with colloidal particles (e.g., clay and organic matter) suggesting a relevant role of colloidal particles in the aquatic ecosystem of the Arvand River in transporting MPs. This study contributes to the better understanding of the presence of MP in major rivers, which are systems that have been scarcely investigated for this type of pollution, and it can inform interventions to reduce MP inputs to the river and sea.

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