Degradação de corantes ácidos por processos oxidativos avançados usando um reator com disco rotatório de baixa velocidade

Química Nova

Vilson Bedim Vianna²  Alexandre Rodrigues Tôrres²  Eduardo Bessa Azevedo¹ 

[1] ,Universidade do Estado do Rio de Janeiro Faculdade de Tecnologia Departamento de Química e AmbientalResende RJ ,Brasil

关键词: dyes;    POA;    TiO2;    H2O2;   

DOI  :  10.1590/S0100-40422008000600015

来源: SciELO

【 摘 要 】

Three technologies were tested (TiO2/UV, H2O2/UV, and TiO2/H2O2/UV) for the degradation and color removal of a 25 mg L-1 mixture of three acid dyes: Blue 9, Red 18, and Yellow 23. A low speed rotating disc reactor (20 rpm) and a H2O2 concentration of 2.5 mmol L-1 were used. The dyes did not significantly undergo photolysis, although they were all degraded by the studied advanced oxidation processes. With the TiO2/H2O2/UV process, a strong synergism was observed (color removal reached 100%). Pseudo first order kinetic constants were estimated for all processes, as well as the respective apparent photonic efficiencies.

【 授权许可】

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