Coupled Influence of Magnetic Biochar and Solution Chemistries on Retention and Release of Nanoplastics in Porous Media.

ABSTRACT: Magnetic biochar (MBC), as an environmentally friendly material, has been extensively used for the remediation of soil and groundwater contamination. The retention and release of nanoplastics (NPs) with carboxyl (NPs-COOH) or amino functionalization (NPs- NH₂) in saturated porous media were investigated under varying conditions of ionic strength (IS), MBC addition, humic acid (HA) concentration, and cation types. The reversible and irreversible retention of NPs was examined by altering the IS, increasing the solution pH, and inducing cation exchange. The results revealed that MBC enhanced the surface roughness of the media, thereby inhibiting NPs' transport. The HA promoted NPs-NH₂ transport more effectively than NPs-COOH due to electrostatic repulsion, steric hindran

SUBMITTER: Qin Y 

PROVIDER: S-EPMC11899741 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature