Study finds microplastic pollution gradient in Egypt's Lake Burullus

A Scientific Reports study assessed microplastic pollution in Egypt's protected Lake Burullus, finding significantly higher concentrations near drainage points than open water. The findings highlight the need for integrated land-and-water waste management in vulnerable Global South coastal ecosystems.

Published in Scientific Reports, the study assessed the distribution and composition of microplastics in Lake Burullus, a protected coastal lagoon on Egypt's Mediterranean coast, using GIS modeling. It revealed a concerning gradient, with significantly higher microplastic concentrations near drainage points than in open water. The research identified eight thermoplastic polymers originating mainly from diffuse land-based sources. Factors including proximity to roads, waterways, land use, and urban areas, alongside salinity and total suspended solids, influenced microplastic distribution, with waterways playing an important role in transporting microplastics into the lake.

Coastal communities across the Global South are most affected, given high reliance on coastal resources and often limited waste-management infrastructure. The study identified urban areas as pollution hotspots, indicating that land-use changes drive microplastic inputs. Land-based activities such as agriculture and urbanization, transmitted via waterways and drainage points, directly threaten aquatic ecosystems. Salinity and total suspended solids were also identified as important factors affecting the fate of microplastics, underscoring how multiple environmental and land-use variables jointly shape pollution outcomes in similar coastal lagoons.

The study underscores the need for integrated waste management addressing both land-based and water-based pollution sources. Governments and planners should prioritize sustainable urban planning and waste-management practices to reduce microplastic inputs from urban hotspots, while engaging local communities in waste reduction and responsible disposal for long-term success. The research calls for global cooperation to address climate change and pollution, prioritizing vulnerable Global South communities through increased investment in adaptation, mitigation, and sustainable development tailored to coastal ecosystem protection.

Key figure — Polymers identified: eight thermoplastic polymers detected in Lake Burullus