Application of the Column of Fe3O4 Free Nanoparticles to Removal of Heavy Metals in Real and Synthetic Leachate

Abstract

Background and Aim: landfill leachate is a type of wastewater that contains significant amounts of soluble organic compounds. The aim of this study is determining the efficiency of the column of nanoparticles in removing heavy metals from leachate. In this study; the required leachate was prepared synthetically. Furthermore, the natural leachate's samples were also collected from Isfahan compost factory on which this study was done. The samples used for analysis from the input of the column of free nanoparticles, first the leachate is stirred by 2 g/L of free nanoparticles for 10 min at 130 rpm, followed by collection and analysis all the samples after 2 min of sedimentation. To determine the efficiency of free nanoparticles and iron (III) magnetic column in removing organic compounds, nitrogen, and phosphorus, first the concentration of these parameters was investigated before and after adding the magnetic nanoparticles, where the efficiency of the removal of COD concentration, ammonia nitrogen, and natural leachate's phosphorus was 98.91, 99, and 99.2%, respectively. Iron (III) nanoparticles in free form can efficiently remove COD, ammonia nitrogen and phosphorus from the leachate obtained from solid waste materials. Across all these stages, it was found that the levels of COD, phosphorus, and ammonium of the leachate before and after the column have significant relationships.