Abundances and Characteristics of Microplastics in Core Sediments of the
Persian Gulf Coast
By Abdurashidov Zafarjon, Scientist at the National University of Uzbekistan
About the Authors
and introduction
Abdurashidov Zafarjon, a scientist at the National University of Uzbekistan, has authored 47 scientific articles on topics including regional economy, geopolitics, population demography, socio-economic trends, climate change, water resource management, alternative energy sources, ecology, and environmental protection. Additionally, he holds one scientific invention. His expertise in environmental science and sustainability provides a foundation for innovative approaches to repurposing microplastics.
This study, conducted along the Persian Gulf coastline near Bushehr City, Iran, assesses the abundance and characteristics of MPs in core sediments. The research focuses on the vertical distribution of MPs and their physical and chemical properties. More importantly, this paper seeks to explore potential solutions for microplastic recycling by identifying organizations and industries that can repurpose these plastic pollutants in various sectors.
Methodology
Sediment samples were collected from six different sites along the coastal zone of Bushehr, Iran, during low tide. The core samples were taken at three depth intervals:
- 0-10 cm
- 10-20 cm
- 20-30 cm
Laboratory analysis included particle size classification, color identification, and Raman spectroscopy to determine the polymer composition of the microplastics.
Findings and Results
01
Microplastic Abundance and Vertical Distribution
- MPs were detected in all sediment depths and locations.
- The average MP concentration was 117.96 ± 97.75 particles per kg of dry sediment.
- No significant differences in MP abundance were observed between the sampling sites.
- The highest concentration of MPs was found in surface sediments (0-10 cm), suggesting continuous deposition and minimal deep-layer penetration.
02
Size, Shape, and Color of Microplastics
- Dominant MP size: 2-5 mm, larger than particles <2 mm.
- Most common shapes: Fibers and fragments were more prevalent than beads or films.
- Color distribution:
- Surface layers (0-10 cm) contained mostly white, transparent, and colorless MPs.
- Black MPs were abundant, likely indicating petroleum contamination
03
Chemical Composition of Microplastics
Raman spectroscopy revealed the presence of several polymer types, including:
- Polystyrene (PS)
- Polyethylene (PE)
- Polyvinyl chloride (PVC)
- Polyethylene terephthalate (PET)
- Polypropylene (PP)
These polymers are widely used in packaging, fishing gear, textiles, and industrial materials, suggesting that their presence is linked to municipal wastewater discharge, fishing activities, and oil-related pollution.