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Degradation of rhodamine dye using a modified flow photocatalytic reactor in the presence of external oxidants
Author(s) -
Bagal Manisha,
Mane Vijay,
Ambulkar Harshal,
Gawande Bhumika,
Naniwadekar Makarand Y.,
Bawankar Kanchan N.,
Dange Parmanand N.,
Mohod Ashish V.,
Gogate Parag R.
Publication year - 2025
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.25576
Subject(s) - degradation (telecommunications) , rhodamine b , photocatalysis , hydrogen peroxide , reagent , chemistry , nuclear chemistry , rhodamine , pollutant , catalysis , photochemistry , chemical engineering , organic chemistry , fluorescence , telecommunications , physics , computer science , engineering , quantum mechanics
Abstract The current work addresses the challenge of effectively degrading Rhodamine B dye, a common environmental pollutant using a modified zig‐zag flow type photocatalytic reactor with the main objective of process intensification. A detailed study into the effect of initial dye concentration and operating solution pH on the degradation of Rhodamine B elucidated that the Rh B dye degradation was higher at a lower solution pH (pH 2) and at an optimum initial (20 ppm) dye concentration. Among different photocatalysts studied including TiO 2 , ZnO, and CaO, maximum degradation was seen for the TiO 2 with 83.3% at optimum loading of TiO 2 (1 g/L). Lower degradations of 76.2% at 1.5 g/L of ZnO and 65.9% at 1.5 g/L of CaO were seen for other photocatalysts. Additionally, the introduction of oxidants such as hydrogen peroxide and Fenton reagent further intensified dye degradation, with the combined UV/Fenton process achieving maximum degradation of 94.8% and the highest COD removal of 68.4%. Overall, it is recommended to utilize zig‐zag flow design photocatalytic reactor with combined Fenton's reagent for optimal dye degradation.