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The contribution of estuaries to the abundance of microplastics in Jakarta Bay, Indonesia
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Researchers found that rivers draining into Jakarta Bay are a major source of microplastics, with polyethylene fragments in the 300-500 micrometer size range dominating, and that spatial variation in abundance across nine estuaries reflects differences in local land use and waste management.
Rivers are one of the main pollution routes to the ocean. This study examines the source of microplastics (MPs) in Jakarta Bay based on their characteristics and estimates MPs emissions from 9 estuaries around Jakarta Bay in 3 administrative areas (Tangerang, North Jakarta, and Bekasi). The sample used was the water's surface taken using a round net. The highest abundance was found in the Dadap River, and the lowest was in the Angke River. The characteristics of the MPs are dominated by fragments, the size of 300-500 μm, and composed of polyethylene. It shows that the MPs originate from the fragmentation of residents' plastic waste that has been in the waters for a quite long time. The nine estuaries also showed a high contribution to MPs in Jakarta Bay: from North Jakarta > Tangerang > Bekasi. The emission is highly correlated with water discharge and MPs' particles in each estuary.
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Microplastic abundance and distribution in surface water and sediment collected from the coastal area
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Researchers found microplastics in both surface water and sediments across 12 coastal sampling sites in Jakarta Bay, Indonesia, documenting their abundance, distribution patterns, and morphological characteristics in a heavily urbanized tropical coastal environment.
Characterization of Microplastics in Jakarta’s Urban Downstream and Estuary Water Bodies
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Researchers characterized microplastic contamination in urban water bodies of Jakarta -- specifically Sunter River, Buaran River, and Marunda Estuary -- which serve as conduits for plastic waste to the ocean. Microplastics were abundant in all sampled water bodies, with fiber and fragment morphotypes dominant, reflecting the high density of urban plastic sources in the surrounding catchments.
Abundance of Microplastics and Hazard to the Environment in Estuary Water in Pemalang, Central Java, Indonesia
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Researchers measured microplastic abundance and types at five sampling locations in the estuary waters of the Pemalang River in Central Java, Indonesia, finding persistent microplastic hazards driven by local human activities and plastic waste inputs.
Characteristics of microplastic waste at the estuaries of DKI Jakarta rivers
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This Indonesian-language study characterized microplastics found at the mouths of rivers flowing through Jakarta. River mouths are major hotspots for plastic accumulation, as they collect debris washed from urban areas and funnel it toward coastal and marine environments.
A novel report on the occurrence of microplastics in Pekalongan River Estuary, Java Island, Indonesia
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Researchers measured microplastic contamination in water and sediments of the Pekalongan River estuary in Indonesia, finding concentrations of 45.2-99.1 particles/L in water and 0.77-1.01 particles/g in sediment. Polystyrene, polyester, and polyamide were the dominant polymers, with fragments and films smaller than 1 mm accounting for the majority.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.