Mohamed Ibrahim Dosouky Helal

Cairo University, Egypt

Title: Immobilization of Cd and Pb in polluted soils using nano particles

Biography

Biography: Mohamed Ibrahim Dosouky Helal

Abstract

Nanotechnology offers a number of highly efficient and less costly techniques that could work to immobilize contaminants. Nano-particles; nano scale zero valent iron “nZVI”, nZVI-bentonite, nanoalginite, and nano carbon; are used as a potential sorbents to immobilize Cd and Pb in polluted soils. These nano-particles are prepared in lab either using top-down or bottom-up methods, then characterized using transmission electron microscope (TEM). The prepared nano-particles proved to have very small size (less than 70 nm), high surface area (194.2-259.7 m2/g) and cation exchange capacity (42.5-47.7Cmolc/kg). Also, the prepared nano-particles proved high adsorption capacity for Pb and Cd, and high retention for the adsorbate metal. The maximum adsorption capacity of nano-particles ranged from 37450-93450 and 17850-25970 mg kg-1 for Pb and Cd, respectively. Moreover, except for nano carbon, only small quantities represent 10.8-33.4% and 13.7-35.6% of the previously adsorbed Cd and Pb, respectively, were released.