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Title: Heterogeneous photo-Fenton like degradation of rhodamine B using copper loaded bentonite and H2O2
Authors: Chanderia, Kiran
Kalal, Sangeeta
Sharma, Jyoti
Ameta, Noopur
Punjabi, Pinki B
Keywords: Degradation;Photodegradation;Photo-fenton reaction;Photo catalyst;Dye degradation;Rhodamine B;Bentonite
Issue Date: 7-Nov-2013
Abstract: Photo-Fenton like degradation of rhodamine B using copper loaded bentonite and hydrogen peroxide is reported. The catalyst has been prepared by loading copper ions on bentonite by wet impregnation method using Na2CO3, Cu(NO3)2.3H2O and bentonite clay. On photo-Fenton treatment, the dye mineralizes into smaller ions like CO32-, NO3-, NO2- etc. The photodegradation efficiency of the catalyst for the rhodamine B dye is found to be 67.92%. Under optimal conditions, the rate constant k is 3.72 × 10-4s-1. A tentative mechanism involving •OH radical as an oxidant in degradation process is proposed. Involvement of OH radicals as an active oxidizing agent is confirmed by the drastic reduction in rate of reaction in presence of isopropanol and butylated hydroxy toluene as radical scavengers. The reduction in reaction rate is higher with butylated hydroxy toluene as compared with isopropanol as the radical scavengers.
Page(s): 1416-1420
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.52A(11) [November 2013]

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