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

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  • معلومة اضافية
    • Contributors:
      FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège; STARESO
    • بيانات النشر:
      Elsevier BV, 2022.
    • الموضوع:
      2022
    • نبذة مختصرة :
      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 in the Arvand river. MP monitoring has been carried out in 24 stations located along the river. The MP pollution found ranged between 1 and 291 items·L-1 and 70 to 15,620 items·Kg-1 (dw), in water and sediment, respectively. The majority of MPs were fibers, black/Gy and yellow/orange in color, 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. Polyethylene terephthalate (PET) and polypropylene (PP) were dominant in the water samples; whereas PET and polystyrene (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 fibers and fragments found with PCA biplots revealed their similar distribution in water. In the sediment samples, fiber 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.
    • Relation:
      https://api.elsevier.com/content/article/PII:S0048969722018216?httpAccept=text/xml; urn:issn:0048-9697; urn:issn:1879-1026
    • الرقم المعرف:
      10.1016/j.scitotenv.2022.154728
    • Rights:
      open access
      http://purl.org/coar/access_right/c_abf2
      info:eu-repo/semantics/openAccess
    • الرقم المعرف:
      edsorb.289179