Experimental study on degradation of acidic big red by sodium hypochlorite catalyzed by loaded iron-based metal oxides
Acidic red is a kind of dye with good properties,and it is also a type of industrial wastewater that is difficult to treat,but due to its high solubility in water,it is often difficult to treat directly by simple methods.Sodium hypochlorite is a multifunctional strong oxi-dant,which is safe and non-toxic,but its stability is not high,the utilization of oxidation activity is not enough,and the removal ability of acidic red dye is limited.Therefore,sodium hypochlorite was used to catalyze the degradation of acidic red by loaded iron-based metal oxides,so as to provide molecular reaction kinetic energy with high efficiency and improve its oxidation,and the degradation effects of pH,catalyst input amount,reaction time,sodium hypochlorite dosage,and load catalyst quantity on acidic red were investigated,and the optimum treatment conditions were obtained.The results showed that:①as the loading amount increases,the CoFe2O4 peak on the diato-maceous earth spectrum becomes more and more obvious by using the precipitation-loading method,and the effective loading was com-pleted;②when pH=4,reaction time is 25 min,catalyst dosage is 0.7 g,loaded catalyst amount is 30％;the degradation effect of acidic red is most significant when the sodium hypochlorite solution is 5 mL;③compared with the oxidative degradation of acidic red by sodi-um hypochlorite and Fenton's reagent,it was found that the removal rate of sodium hypochlorite on acidic red was higher than that of Fenton's reagent;④in actual degradation experiment of production wastewater,the effect of sodium hypochlorite catalyzed by loaded i-ron-based metal oxides in the degradation of acidic red and COD is very significant,the removal rates of acidic red and COD in wastewater by this method are 90％and 83％,respectively.
sodium hypochloritecatalytic degradationacidic big rediron-based metal oxides
NETL
NSTL
万方数据
