Microplastic pollution linger in rivers for years before entering oceans

Source: Science Daily

Because rivers are in near-constant motion, researchers previously assumed lightweight microplastics quickly flowed through rivers, rarely interacting with riverbed sediments. With new simulations, researchers now have discovered hyporheic exchange — a process in which surface water mixes with water in the riverbed — can trap lightweight microplastics that otherwise might be expected to float.

https://www.sciencedaily.com/releases/2022/01/220112145029.htm