Comparative characterization of sorption efficiency of activated carbon samples modified with Fe2O3

Abstract

It was found that the modification of commercial activated carbon grades F400 and AS-CS with ferric oxide obtained from alumina production waste "red mud" allows increasing the sorption capacity of activated carbon grade F400 to 60.241 mg/g (2 times). At the same time, the maximum sorption capacity of activated carbon AS-CS increases almost 7 times. The content of Fe2O3 fixed in the structure of activated carbon reaches 9.14%. It has been established that the modification forms an additional number of phenolic groups on the surface of the material, which contributes to an increase in the anion exchange capacity of the sorption material by 2.55 times. The sorption material is effective for removing phosphorus compounds from water at the level of 88.1% and can be recommended for use in the treatment of industrial water.