Adsorption mechanism of aqueous Cr(vi) by Vietnamese corncob biochar: a spectroscopic study.

ABSTRACT: Cr(vi) is highly toxic and carcinogenic, posing significant threats to health and ecosystems. This study utilizes solid waste from corncobs to synthesize biochar (CCBC) for the removal of Cr(vi) from water. The most effective Cr(vi) removal was achieved at pH 2.0, with a maximum adsorption capacity (Q _m, Langmuir, mg g^-1) of 38.1, higher than that of activated carbon (25.69), composite (35.84), and magnetic biochar (25.94) derived from corncobs. Brunauer-Emmett-Teller (BET) results indicated that Cr(vi) was adsorbed on the internal surface instead of external surface. Scanning electron microscope (SEM-mapping) images combined with the pH_PZC value (7.6) demonstrated that Cr(vi) interacts with the material surface via electrostatic mechanisms. E

SUBMITTER: Nguyen DK 

PROVIDER: S-EPMC11632952 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature