Heterogenous solar photocatalysis of two commercial reactive azo dyes.
Two commercial reactive azo dyes--Reactive Black 5 (RB5) and Reactive Orange 16 (RO 16) have been treated by titanium dioxide and Zinc oxide photocatalysts separately under presence of sunlight. It is observed that solar photocatalytic treatment is effective in terms of colour and COD. The photodegradation efficiency of zinc oxide is comparable with TiO2 at pH 5-6 for RO16. The extent of decolourization and degradation of RB5 is greater in presence of zinc oxide photocatalyst than TiO2 at pH 5- 6. Zinc oxide undergoes <1% photodissolution after 6 hours of solar irradiation at working pH.
Dhodapkar
Rita S
RS
National Environmental Engineering Research Institute, Nehru Marg, Nagpur--20, India. wwtdiv@nagpur.dot.net.in
Chaturvedi
Vibha
V
Neti
Nageswara R
NR
Kaul
Santosh N
SN
D001391:Azo Compounds / Q000737:chemistry*; D002384:Catalysis; D004396:Coloring Agents; D009282:Naphthalenesulfonates / Q000737:chemistry*; D010084:Oxidation-Reduction; D010777:Photochemistry; D013783:Textile Industry; D014025:Titanium / Q000737:chemistry; D018508:Water Purification / Q000379:methods*; D015034:Zinc Oxide / Q000737:chemistry
D001391:Azo Compounds; D004396:Coloring Agents; D009282:Naphthalenesulfonates; C483723:reactive orange 16; C009495:titanium dioxide; D014025:Titanium; C063421:Remazol black B; D015034:Zinc Oxide