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

Nguyen Lan Huong; Bui Xuan Khanh; Tran Thi Viet Nga; Nguyen Tien Dung

doi:10.31814/stce.huce2023-17(2)-13

Nguyen Lan Huong Faculty of Environmental Engineering, Hanoi University of Civil Engineering, 55 Giai Phong road, Hai Ba Trung district, Hanoi, Vietnam
Bui Xuan Khanh Faculty of Chemistry, University of Science, Vietnam National University Hanoi, 19 Le Thanh Tong street, Hoan Kiem district, Hanoi, Vietnam
Tran Thi Viet Nga Faculty of Environmental Engineering, Hanoi University of Civil Engineering, 55 Giai Phong road, Hai Ba Trung district, Hanoi, Vietnam
Nguyen Tien Dung Faculty of Construction Materials, Hanoi University of Civil Engineering, 55 Giai Phong road, Hai Ba Trung district, Hanoi, Vietnam

DOI: https://doi.org/10.31814/stce.huce2023-17(2)-13

Keywords: permeable reactive barriers, landfill leachate, construction demolition waste, heavy metals, adsorption

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 the
targeted 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.

Downloads

Download data is not yet available.