Removal of 4-Chloro-2-nitrophenol from Aqueous Solution by ZnO

The present work is focused on the catalytic removal of 4-chloro-2-nitrophenol,using catalyst. The used catalyst was zinc oxide. Removal experimental was carried out to optimize the amount of catalyst, effect of 4-chloro-2- nitrophenol concentration, contact time and effect of pH using UV-visible Spectrophotometer technique. The removal rate was strongly influenced by the pH, initial concentrations of 4-chloro-2 nitrophenol and catalyst. The maximum degradation achieved at pH=4, 0.1 g of ZnO and 2mg/L of 4-chloro-2 nitrophenol concentration. The Maximum 38% removal achieved at this conditions. A pseudo second-order kinetic model resulted in the best fit (R2 = 0.985).