Mekong River microplastics linked to waste collection access
Summary and headline written by AI from the source article. How we work
Fishermen in Cambodia’s Mekong River alerted scientists to increasing plastic in their catches, prompting a research expedition with Wonders of the Mekong to investigate the source.
Researchers from the Desert Research Institute and the University of Nevada Reno sampled plastics and microplastics along the Cambodian Mekong River in 2022. They discovered that communities without waste collection services had significantly higher concentrations of microplastics in the water immediately downstream.
The team modeled this relationship and determined that improving waste collection in rural areas could substantially reduce microplastic levels. This research is important because 66% of Cambodians depend on the Mekong River for fishing or work. They also found that the amount of plastic carried by the river increased dramatically during the wet season due to monsoon rains flushing trash from the riverbed and surrounding land.
Researchers identified a greater variety of plastic types during the dry season, but polypropylene, PET, and polyethylene were most common during the monsoon season. The study builds on previous research in other major Asian rivers like the Yangtze, Yellow, and Godavari. In 2018, only 19% of Cambodian municipalities had contracted waste collection, leaving most rural communities to dispose of waste improperly. Researchers plan to return to the Mekong River to measure any improvements from expanding waste collection services.
