Open AccessCaracterização de reator fotoquímico para aplicações em processos oxidativos avançados
Author(s) -
Ailton José Moreira,
Thales Martins Silva,
Gian Paulo Giovanni Freschi
Publication year - 2019
Publication title -
acta brasiliensis
Language(s) - English
Resource type - Journals
eISSN - 2526-4338
pISSN - 2526-432X
DOI - 10.22571/2526-4338240
Subject(s) - chemistry , mercury (programming language) , analytical chemistry (journal) , microwave , microwave power , photochemistry , environmental chemistry , physics , quantum mechanics , computer science , programming language
This study broadens the understanding of photochemical processes by calculating the quantum efficiency of the Hg-MDEL lamp and discusses the environmental application of this lamp model in advanced oxidative processes. This set of information is relevant to broaden the application of Hg-MDEL in various environmental studies. Thus, a photochemical reactor composed of a microwave-fired mercury-free mercury (Hg-MDEL) lamp (MW) was evaluated from KI/KIO3 actinometric studies. The emission spectra were characterized along the UV-A, UV-B, UV-C and visible regions by means of a spectroradiometer, displaying linear correlation with the microwave power variation applied. The photochemical conversion of KI / KIO3 to I3- was up to 0.073 mmol L-1 when the KI initial concentration was 0.1 mol L-1 and 0.65 mmol L-1 when the KI concentration was 0.7 mol L-1, applying a microwave power of 600 and 400 W respectively. These results indicate that the photon emission near the reactor is more significant for higher powers, actively contributing to the formation of I3-.