Experimental and DFT insights into the adsorption mechanism of methylene blue by alkali-modified corn straw biochar.

ABSTRACT: As an efficient and cost-effective adsorbent, biochar has been widely used in the adsorption and removal of dyes. In this study, a simple NaOH-modified biochar with the pyrolysis temperature of 300 °C (NaCBC₃₀₀) was synthesized, characterized, and investigated for the adsorption performances and mechanisms of methylene blue (MB). NaCBC₃₀₀ exhibited excellent MB adsorption performance with maximum removal efficiency and adsorption capacity of 99.98% and 290.71 mg g^-1, which were three and four times higher than biochar without modification, respectively. This might be attributed to the increased content of -OH and the formation of irregular flakes after NaOH modification. The Freundlich isotherm suggested multilayer adsorption between NaCBC₃₀₀ and

SUBMITTER: Yu H 

PROVIDER: S-EPMC10773387 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature