Effect of surfactants on the transport of polyethylene and polypropylene microplastics in porous media.

The transport of microplastics in porous media is attracting increasing attention. However, to date, research is limited to polystyrene microplastics. Meanwhile, surfactants can promote solid dispersion to form a stable suspension, possibly allowing microplastics to migrate when attached to a surfactant, which would increase the scope and degree of microplastic pollution, further endangering human health and the stability of the ecological environment.

The transport of graphitic carbon nitride in saturated porous media: Effect of hydrodynamic and solution chemistry.

Understanding transport behavior of graphitic carbon nitride (g-CN) in porous media plays an important role in preventing its possible causing the underground environmental problems. The transport behavior of g-CN in porous media were investigated by packed column experiments at different flow rates, ionic strengths (ISs), pHs and multivalent cations. The experimental results showed that the transport ability of g-CN decreased with the IS increasing, and most of the g-CN was retained in the sand column for the IS greater than 0.

Co-transport of Pb(II) and oxygen-content-controllable graphene oxide from electron-beam-irradiated graphite in saturated porous media.

It is essential to investigate the role of the surface oxygen content of graphene oxide (GO) in transport processes. In this study, GO was prepared using flake graphite with different radiation doses. The effects of the flow rate and ionic strength (IS) on the migration and co-transport of GO and Pb(II) ions were investigated via laboratory packed-column experiments.