Effect of calcium peroxide pretreatment on the remediation of sulfonamide antibiotics (SMs) by Chlorella sp.

This study investigated the effect of CaO2 pretreatment on sulfonamide antibiotics (SMs) remediation by Chlorella sp. Results showed that a dose ranging from 0.05 to 0.1 g/g biomass was best and led higher SMs removal efficacy 5–10% than control. The contributions made cometabolism in were very similar. Bioassimilation could remove 24% sulfadiazine (SDZ) sulfamethazine (SMZ), accounted for 38% sulfamethoxazole (SMX) remediation. Pretreatment wielded positive microalgae. extracellular polymeric substances (EPS) level microalgae three times when subjected non-pretreatment. For long-term, removed 10–20% more non-pretreatment Protein fractions EPS continuous operation produced up 90 mg/L cometabolism. bioassimilation, SMX intensity samples 160-fold less non-treatment one. It indicated has enhanced biochemical function intracellular environment Peroxidase enzyme involved positively degradation several metabolites including ring cleavage, hydroxylation pterin-related conjugation.