The removal of acrylic acid from wastewater in scrap iron-H2O2 oxidation system

摘要

The removal of acrylic acid from acrylic wastewater by Fenton oxidation treatment was researched. The Fenton oxidation was obtained by adding scrap iron and H2O2 into the wastewater. The operating conditions such as temperature,liquid-solid ratio (the volume of wastewater: the mass of iron), hydrogen peroxide dosage, reaction time were systematically studied and optimized in batch reaction.The results show that Fenton oxidation reaction between scrap iron and hydrogen peroxide can produce hydroxyl radicals, which can effectively degrade the acrylic acid in the industrial wastewaters. The suitable conditions were found as follows:liquid-solid ratio is 40:1, temperature is 20 ??~25 ??, hydrogen peroxide dosage (H2O2) is 800mg·L -1 and reaction time is 35 min. Using them, the degradation ratio of acrylic acid from the wastewater is above 95%.In this method, the scrap iron was used as reactant to replace (FeSO4·7H2O) in Fenton oxidation. So, cost is lower and it is more befitting for industrial application.