Effect of dissolved humic acids and coated humic acids on tetracycline adsorption by K₂CO₃-activated magnetic biochar.

ABSTRACT: Humic acids (HAs) widely exist in water environment, and has an important impact on the adsorption of pollutants. Herein, HAs (both dissolved and coated) was employed to assess the effect on the removal of the organic contaminant tetracycline (TC) by K₂CO₃ modified magnetic biochar (KMBC). Results showed that low concentration of dissolved HAs promoted TC removal, likely due to a bridging effect, while higher concentration of dissolved HAs inhibited TC adsorption because of the competition of adsorption sites on KMBC. By characterization analysis, coated HAs changed the surface and pore characteristics of KMBC, which suppressed the TC removal. In a sequential adsorption experiment involving dissolved HAs and TC, the addition of HAs at the end of the experiment led to

SUBMITTER: Li M 

PROVIDER: S-EPMC9643364 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature