Peroxymonosulfate Activation by Rice-Husk-Derived Biochar (RBC) for the Degradation of Sulfamethoxazole: The Key Role of Hydroxyl Groups.

ABSTRACT: In this work, rice-husk-derived biochar (RBC) was synthesized by using simple one-step pyrolysis strategies and served as catalysts to activate peroxymonosulfate (PMS) for degrading sulfamethoxazole (SMX). When the annealing temperature (T) = 800 °C, RBC₈₀₀ exhibits the typical hardwood structure with several micropores and mesoporous. Furthermore, RBC₈₀₀ obtains more defect sites than RBC₆₀₀, RBC₇₀₀, and RBC₉₀₀. In the RBC₈₀₀/PMS system, the removal rate of the SMX reached 92.0% under optimal conditions. The kinetic reaction rate constant (k_obs) of the RBC₈₀₀/PMS system was 0.009 min^-1, which was about 1.50, 1.28, and 4.50 times that of the RBC₆₀₀/PMS (k_obs

SUBMITTER: Liu T 

PROVIDER: S-EPMC11545899 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature