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Treatment of saponin wastewater by UV/TiO_2/Fenton photocatalytic oxidation

Guan Hong-xun

Abstract

Diosgenin wastewater belong to difficult biodegradable wastewater,it was treated by UV/TiO2/Fenton process in this paper.The influences of pH,H2O2,temperature and reaction time on the removal efficiency of COD were studied.Results showed that under the conditions of normal temperature,pH 5.0,H2O2 dose is 20 mL/L,reaction time 45 min,TiO2 thin film as photocatalyst,and removal rate of COD was up to 94%,reached the national emission standard.

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Key concepts: Wastewater, Photocatalysis, Diosgenin, Chemistry, Nuclear chemistry, Pulp and paper industry, Catalysis, Organic chemistry