Treatment of toxic industrial effluent containing nitrogenous organic compounds by integration of catalytic wet air oxidation at atmospheric pressure and biological processes

Efficient removal of piperazine by catalytic wet air oxidation using RuNiCe/γ-Al2O3-activated carbon

“…From Fig. 1(b), it can be seen that only the vice-active component Ce enhances the removal rate of NH 3 -N from piperazine by the catalyst, which may be due to the fact that the catalytic activity of transition metals is much lower than that of Ru, and did not form a synergistic effect with Ru, and could not increase the catalytic activity, and even reduced the catalytic ability due to the agglomeration of the components, and the addition of Ce made the interactions between the active components and the carriers weakened, and enhanced the dispersal of the metal components in the carriers, 17 which enhanced the catalytic efficiency. Ni metal very significantly enhanced the removal efficiency of the catalyst for NH 3 -N from piperazine, which led to the determination of the active component composition of the catalyst.…”

“…Sushma et al effectively utilized CeO 2 to enhance Pt/Al 2 O 3 and MnOx/ Al 2 O 3 catalysts. 16,17 Under 70 °C conditions, their CWAO process achieved complete toxicity removal from wastewater containing nitrogen-containing heterocyclic compounds, with corresponding maximum COD removal rates of 61% and 44%, respectively.…”

Study on the biodegradability of a chitosan‐modified hyperbranched polymer for enhanced oil recovery

“…The biodegradability of a polymer refers to the ratio of its BOD to COD 36 . A higher ratio indicates a better biodegradability of the polymer 37 .…”