Effective adsorption of nutrients from simulated domestic sewage by modified maifanite

Abstract

Modi ed maifanite (MMF) was prepared by synthesized method with sulfuric acid treatment and high temperature calcination, and evaluated as an effective adsorption material to remove the nutrient salt in waste watery. Compared with the raw maifanite (RMF), the MMF exhibited the higher adsorption capacity and higher removal e ciency. The results showed that the adsorption rates of total phosphorus (TP), total nitrogen (TN), ammonia nitrogen (NH 3 -N), nitrate nitrogen (NO x -N) and Chemical Oxygen Demand (COD) by MMF (RMF) were86.7% (76.7%), 44.9% (34.5%), 29.1% (20.8%) and 79.8% (13.0%) respectively at 20 ℃ for 24 h. MMF kept the basic structure and composition of maifanite with stronger surface roughness and more adsorption active sites. This study suggests that MMF can be further applied to treat domestic sewage and eutrophic water.Highlights MMF (acidi cation-calcination modi cation) was prepared and characterized.MMF exhibited a higher adsorption capacity than RMF.The mechanism of MMF on pollutants removal was mainly chemical adsorption.MMF could be further applied to treat domestic sewage and eutrophic water.