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2271051 
Journal Article 
Heterogeneous photo-Fenton like degradation of rhodamine B using copper loaded bentonite and H2O2 
Chanderia, K; Kalal, S; Sharma, J; Ameta, N; Punjabi, PB 
2013 
1 
Indian Journal of Chemistry. Section A
ISSN: 0376-4710
EISSN: 0975-0975 
52 
11 
1416-1420 
WOS:000327418000007 
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)center dot 3H(2)O 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 x 10(-4)s(-1). A tentative mechanism involving (OH)-O-center dot radical as an oxidant in degradation process is proposed. Involvement of (OH)-O-center dot 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. 
Degradation; Photodegradation; Photo-fenton reaction; Photo catalyst; Dye degradation; Rhodamine B; Bentonite