Degradation of Orange G in water by nano-Cu0/H2O2 process with nano-Cu0 synthesized in a rotating packed bed with blade packings

Abstract

In this investigation, Orange G in water was degraded by the nano-Cu0/H2O2 process with nano-sized copper particles (RPB-nano-Cu0) that were synthesized by chemical reduction in a rotating packed bed (RPB) with blade packings. The effects of H2O2 dosage and RPB-nano-Cu0 dose on the degradation of Orange G by the RPB-nano-Cu0/H2O2 process were investigated. An optimal H2O2 dosage in the degradation of Orange G by the RPB-nano-Cu0/H2O2 process was 5 mmol/L for a RPB-nano-Cu0 dose of 0.25 g/L. An optimal RPB-nano-Cu0 dose in the degradation of Orange G by the RPB-nano-Cu0/H2O2 process was 0.25 g/L for an H2O2 dosage of 5 mmol/L. The RPB-nano-Cu0/H2O2 process with 25 °C, pH 3, an H2O2 dosage of 5 mmol/L, and a RPB-nano-Cu0 dose of 0.25 g/L exhibited an efficiency of degradation of Orange G (10 mg/L) of 93% at 30 min. The efficiency of degradation of Orange G (10 mg/L) using commercial nano-Cu0 from Sigma-Aldrich (0.25 g/L) in the presence of H2O2 (5 mmol/L) at pH 3 was 73% after 30 min. The RPB-nano-Cu0/H2O2 process exhibited the great potential in the efficient degradation of Orange G in water.