We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Solid waste management practices in riparian communities are a key driver of microplastic concentrations in the Mekong River, Cambodia
AI summary Read the abstract
Researchers studied microplastic levels in the Mekong River in Cambodia, testing water samples across seasons. Areas with better household waste collection had notably lower microplastic concentrations in river water, and particle size and type varied between dry and wet seasons, suggesting waste collection access is linked to pollution levels.
Rivers are major conduits of plastic pollution, however the role of community level waste collection on riverine microplastic concentrations remains poorly understood. We investigated seasonal patterns and drivers of microplastic pollution along the Lower Mekong River, Cambodia, with a focus on riparian waste collection services. Surface water samples were collected during dry and wet seasons using a pump and filter method (100 µm minimum aperture), and more than 15,000 particles were chemically identified using Fourier Transform Infrared spectroscopy (FTIR). Statistical models evaluated the relationships between microplastic concentrations and upstream waste collection availability, population, household income, and season. Microplastic concentrations varied across sites and showed significant seasonal differences in particle size, morphology, and polymer composition. Dry season samples were dominated by small (<100 μm), diverse polymers, whereas wet season samples contained larger (<300 μm) particles associated with single-use plastics, consistent with monsoon-driven mobilization of household waste. Across seasons, microplastic concentrations showed a strong negative correlation with upstream waste collection availability. Model results indicate that modest increases in waste collection access in low-service riparian communities could reduce downstream water surface microplastic concentrations by approximately 50%. These findings identify waste collection infrastructure as a critical, actionable control for reducing riverine microplastic pollution.
More Papers Like This
Microplastics pollution in selected rivers from Southeast Asia
AI summary Read the abstract
Researchers surveyed microplastic pollution in rivers across Southeast Asia, a region with high plastic waste discharge but limited monitoring data, documenting the distribution and characteristics of microplastics in these understudied waterways.
The transport and vertical distribution of microplastics in the Mekong River, SE Asia
AI summary Read the abstract
Researchers measured microplastic levels throughout the water column of the Mekong River in Cambodia and Vietnam, finding concentrations increased significantly from rural to urban areas. Most microplastics were fibers, predominantly polyester, and 86% were transported within the water column rather than at the surface. The study reveals that surface-only sampling methods substantially underestimate actual microplastic levels in major rivers.
Microplastic contamination on urban river under different precipitation rate and land use gradient
AI summary Read the abstract
Researchers sampled water, sediment, and fish across nine sites in a Javanese urban stream through wet and dry seasons, finding that microplastic abundance in water was higher during dry conditions when developed land use concentrated runoff, while seasonal flushing during the wet season obscured these land-use patterns and fish accumulation depended more on species behavior than pollution levels.
Large variation in Mekong river plastic transport between wet and dry season
AI summary Read the abstract
A harmonized measurement approach was applied to the Mekong River system, revealing that floating plastic item and mass transport increased by factors of up to 170 and 294 respectively between dry and wet seasons, highlighting the strong seasonal variability in river plastic flux.
Impact of a municipal solid waste processing facility on microplastic pollution in Indonesia’s waterways
AI summary Read the abstract
Researchers quantified and characterized riverine microplastic pollution in the Jangli River in Semarang City, Indonesia, and assessed the contribution of a nearby Municipal Solid Waste Temporary Processing Site (TPS) to MP contamination through water sampling and field observation. The study documents how proximity to solid waste facilities elevates microplastic concentrations in urban waterways.
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.