Effect of reductive compounds on oxidation of phenol by permanganate

The effects of five inorganic reductants and two organic compounds on the oxidation of phenol by potassium permanganate were compared.The joint effect of combination an inorganic reducing agent and organic ingredient on the oxidation of phenol were also investigated.The experimental results show that sulfite,thiosulfate and manganese ion improved oxidation of phenol with the removal efficiency increased by 7~13%,while ferrous ion and nitrite exhibited inhibition first and then improvement of the reaction.The removal efficiencies of phenol increased by 8% and 24% for ferrous and nitrite,respectively.Carbamazepine(CMZ) and bisphenol A(BPA) on the promotion of potassium permanganate oxidation of phenol were 7% and 16%,respectively.Ferrous or nitrite together with BPA,showed synergistic effects on oxidation of phenol,the removal rates of phenol reached 79% and 99%,respectively.The effect of reductants on oxidation of phenol mainly depends on the production rate and concentration of manganese dioxide.