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<p>This study provides the first polymer-specific baseline assessment of microplastic (MP) contamination (0.15–5.0&#xa0;mm) in four contrasting freshwater systems in Uzbekistan: the urban Karasuv Canal, glacier-fed Chirchik River, agriculturally influenced Sangzor River, and closed-basin Lake Tuzkon. Using a Microshup sampling device, stereomicroscopy, and Raman spectroscopy, we quantified MP concentrations, characterized particle morphology and color, and identified polymer types. Among the 480 confirmed MPs, microfibers (45%) and fragments (35%) predominated, with transparent (50%) and blue (30%) particles being the most common. MP concentrations ranged from 1.4 particles m⁻<sup>3</sup> in the Chirchik River to 2.4 particles m⁻<sup>3</sup> in Lake Tuzkon, while the highest relative load per water unit occurred in the Sangzor River, likely linked to agricultural runoff. Polymer analysis revealed polyethylene terephthalate (PET) and polypropylene (PP) as the dominant polymers, with greater polymer diversity in Lake Tuzkon. The results reveal that hydrological conditions, land-use patterns, and waste management practices jointly influence the distribution of microplastics across Uzbekistan’s freshwater ecosystems. This study establishes an essential regional baseline for Central Asia and highlights the pressing need for continuous monitoring, improved waste management strategies, and expanded research that includes sediment assesment, finer plastic fractions, and ecotoxicological risk evaluation.</p>

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Evaluating Microplastic Pollution in Key Water Basins of Tashkent and Jizzakh, Uzbekistan: A Preliminary Study

  • 期刊论文

  • 发表日期：

    2026年1月19日

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  • Alijon Khusanov,
  • Sherzodbek Tashbaev,
  • Yulia Frank,
  • Jasur Nizomov,
  • Danil Vorobiev,
  • Azizullo Kuranov,
  • Egor Vorobiev,
  • Akramjon Yuldashev,
  • Svetlana Vorobieva,
  • Mukhammadyusuf Juraev,
  • Ilyas Isakov,
  • Dilyorbek Karimjonov,
  • Soumya Ghosh,
  • Chinenye Adaobi Igwegbe,
  • Yusufjon Gafforov

摘要

This study provides the first polymer-specific baseline assessment of microplastic (MP) contamination (0.15–5.0 mm) in four contrasting freshwater systems in Uzbekistan: the urban Karasuv Canal, glacier-fed Chirchik River, agriculturally influenced Sangzor River, and closed-basin Lake Tuzkon. Using a Microshup sampling device, stereomicroscopy, and Raman spectroscopy, we quantified MP concentrations, characterized particle morphology and color, and identified polymer types. Among the 480 confirmed MPs, microfibers (45%) and fragments (35%) predominated, with transparent (50%) and blue (30%) particles being the most common. MP concentrations ranged from 1.4 particles m⁻3 in the Chirchik River to 2.4 particles m⁻3 in Lake Tuzkon, while the highest relative load per water unit occurred in the Sangzor River, likely linked to agricultural runoff. Polymer analysis revealed polyethylene terephthalate (PET) and polypropylene (PP) as the dominant polymers, with greater polymer diversity in Lake Tuzkon. The results reveal that hydrological conditions, land-use patterns, and waste management practices jointly influence the distribution of microplastics across Uzbekistan’s freshwater ecosystems. This study establishes an essential regional baseline for Central Asia and highlights the pressing need for continuous monitoring, improved waste management strategies, and expanded research that includes sediment assesment, finer plastic fractions, and ecotoxicological risk evaluation.