Sistema de injeção em fluxo espectrofotométrico para monitorar peróxido de hidrogênio em processo de fotodegradação por reação foto-Fenton

Química Nova

Mirela C. Oliveira²  Raquel F. Pupo Nogueira²  José A. Gomes Neto²  Wilson F. Jardim¹  Jarbas J. R. Rohwedder¹ 

[1] ,UNESP Instituto de Química Departamento de Química AnalíticaAraraquara SP

关键词: hydrogen peroxide;    flow injection analysis;    foto-Fenton;   

DOI  :  10.1590/S0100-40422001000200007

来源: SciELO

【 摘 要 】

A flow injection spectrophotometric system was projected for monitoring hydrogen peroxide during photodegradation of organic contaminants in photo-Fenton processes (Fe2+/H2O2/UV). Sample is injected manually in a carrier stream and then receives by confluence a 0.1 mol L-1 NH4VO3 solution in 0.5 mol L-1 H2SO4 medium. The product formed shows absorption at 446 nm which is recorded as a peak with height proportional to H2O2 concentration. The performance of the proposed system was evaluated by monitoring the consumption of H2O2 during the photodegradation of dichloroacetic acid solution by foto-Fenton reaction.

【 授权许可】

CC BY-NC   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License