Work

Microplastics in Weras Ganga, Bolgoda North Lake, Sri Lanka: A Reflection of Urban Waste Mismanagement

Year: 2025

Type: article

Abstract: Microplastic (MP) pollution has emerged as a significant environmental issue, especially within urban riverine systems affected by inadequate waste management practices. This research examined the spatial distribution, morphological characteristics, and polymer composition of MPs in the Weras Ganga and Bolgoda North Lake, Sri Lanka, with particular attention to the impact of the nearby Karadiyana Open Dump (KOD). Water and sediment samples were collected from 15 sites and analyzed utilizing Fourier Transform Infrared (FTIR) Spectroscopy for MP identification. The findings indicated a predominance of fibers (>50%) in both water and sediments, with the highest concentrations located near the KOD, suggesting substantial contributions from textile and synthetic waste. Polyethylene, polypropylene, and polystyrene were identified as the most prevalent polymer types, pointing to contributions from consumer packaging and industrial waste. Correlation analysis disclosed a moderate positive association between MP concentrations and physicochemical parameters such as turbidity and temperature, underscoring their role in MP transport and deposition processes. Sediment samples consistently showed higher MP concentrations than water, highlighting their function as a reservoir for MPs. The results underscore the pressing need for integrated waste management strategies, including a reduction in single-use plastics and enhancements in recycling infrastructure, to alleviate MP contamination in freshwater ecosystems. This research provides important insights into MP pollution dynamics in tropical urban rivers and stresses the necessity for specific interventions to safeguard aquatic ecosystems and public health.

Source: Results in Engineering

DOI: 10.1016/j.rineng.2025.105243

Authors: Mahesh Jayaweera, Shakthi Bastians, Janith Dissanayake, Chamini Hemachandra, Thilomi Samarakoon

Institutions: University of Moratuwa, University of Colombo, University of Kelaniya

Language: English

Topic: Microplastics and Plastic Pollution

Subfield: Pollution

Field: Environmental Science

Domain: Physical Sciences

SDGs: Clean water and sanitation, Responsible consumption and production, Sustainable cities and communities

Open Access status: gold

Estimated APC paid: $1,940