Study on the kinetic characteristics of removing antibiotics from rural domestic sewage tailwater by modifying titanium dioxide with straw hydrothermal carbonation liquid
To explore the kinetic characteristics of removing antibiotics by modifying titanium dioxide with straw hydrothermal carbonation liquid(SHCS&TiO2),rural domestic sewage tailwater was taken as target treatment water body,sulfadiazine and erythromycin were taken as typical target pollutants,and time gradient experiments and dynamic simulation were used for analysis.The results showed that:1)there was a significant difference in the kinetic characteristics of removing antibiotics by SHCS&TiO2.For sulfadiazine,the removal reaction emerged in the first 10 minutes with a removal rate of 2.11-2.37 mg/(L·min),and the final removal efficiency was 72.6％-89.5％.For erythromycin,the removal reaction emerged in 0-20 minutes with a removal rate of 1.65-2.34 mg/(L·min)and 120-240 minutes with a removal rate of 0.32-0.42 mg/(L·min),and the final removal efficiency was 100.0％.2)Behnajady-Modirshahla-Ghanbary reaction kinetic model was the best for simulation.3)The removal mechanism was a combination of adsorption and catalysis,and catalysis played the major role.
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