Crushed construction and demolition waste as reactive media in permeable reactive barriers to immobilize Pb(II) and Cd(II) from landfill leachate

Abstract

This study evaluates the effectiveness of using crushed construction and demolition waste as reactive media for applying in Permeable Reactive Barriers to treat contaminated groundwater by landfill leachate. Modern analytical methods such as SEM and EDX were used to analyze the physicochemical properties of crushed demolition waste, demonstrating that the material has a porous structure on the surface that is suitable for thetargeted heavy metal adsorption. For ion Pb2+ , the maximum adsorption amount of 114.05 mg/g was for 1-3 mm fraction and 105.05 mg/g for 3-5 mm fraction. Similarly, ion Cd (II) achieves the maximum adsorption capacity of 8.43mg/g with 1-3mm and 6.26mg/g with 3-5mm fraction. Simultaneously, this paper investigates the impact of additional parameters such as time and pH on the adsorption efficiency of the materials.