Sedimentary microplastics in the river-to-ocean continuum in Southeast Asia: spatial distribution, particle characteristics, and ecological risk

2026-08-10

Thi Thao Nguyen

Vincent Fauvelle

Sylvain Ouillon

Van Hoi Bui *

Laure Malleret *

DOI：10.1016/j.marpolbul.2026.120207

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• A first dataset of sedimentary MPs in the three main Vietnamese riverine systems was established. • Microplastic abundances reached up to 32,151 items.kg−1 and 254 mg.kg−1 in the Saigon River. • Urban and industrial areas are MP hotspots, while estuaries are key traps. • Small size MPs (< 200 μm) were predominant; PE, PP, PET, and PVC were the major polymers. • Ecological risks were scored at moderate to dangerous levels, according to PHI and PERI.

Keywords:

Tropical rivers

Sediment

Ecological risks

Red River

Saigon River

Mekong River

Sedimentary microplastics in the river-to-ocean continuum in Southeast Asia: spatial distribution, particle characteristics, and ecological risk

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