Abstract

Textile dyes are one of the most significant organic pollutants that are responsible for numerous environmental problems. This study was performed to determine the process efficiency of the greener silver nanoparticles/hydrogen peroxide/ozone combination to degrade, common dye, and reactive blue 19. The removal efficiency for reactive blue 19 and chemical oxygen demand (COD) was investigated under varying conditions such as pH, initial catalyst concentration, initial oxidant concentration, and initial dye concentration with ozone flow rate of 1 gr/min; optimum conditions found being 5 mg L-1 reactive blue 19 dye, pH = 3, 0.025 mg L-1 of calcium peroxide, 5 mg L-1 of AgNPs and contact time of 30 min when maximum removal efficiency of 98 was attained. The catalytic activity of AgNPs was maintained for two cycles but after the third and fourth use, the removal efficiency is reduced due to the changes in the catalyst surface as well as the inactivation of the catalyst by the intermediate products produced during the process. In addition to salient features such as strong oxidation, decomposition of refractory organic compounds, and high efficiency, this method may be advisable for removal of reactive blue 19 dyes from textile industry wastewater.