The removal of deinking wastewater using neutralization, activated carbon, and hydrogen peroxide oxidation

摘要

Treatment of deinking wastewater with neutralization, activated carbon, and hydrogen peroxide oxidation is investigated. Discusses the various factors of the neutralization experiment and catalytic experiment on the influence of the experimental results. The results show that for the 20 mL deinking wastewater, first neutralize it to pH=4 with dilute sulfuric acid, then the mass fraction of 0.8 mL H_2O_2 (mass fraction of 30%) and 0.8 g active carbon powder in oxidative 19 min under conditions of pH=3 with an optimum addition of 0.8 mg H_2O_2 (30%) as well as 0.8 g active carbon powder, the COD_(cr) can be reduced from 31000 mg/L to 2300 mg/L, and the color unit can be reduced from 15000 to 0 after treatment, its COD_(cr) and color unit decrease significantly and the removal rates reach 90% and 100% respectively.