Immobilization of Heavy Metals on Pillared Montmorillonite With a Grafted Chelate Ligand
Document Type
Article
Publication Date
10-15-2013
Description
The objective of this work was the development of an efficient adsorbent for irreversible immobilization of heavy metals in contaminated soils. The adsorbent was prepared by pillaring of montmorillonite with silica followed by grafting of a chelate ligand on its surface. Obtained adsorbent was mesoporous with high content of adsorption sites. Its structure was studied by BET adsorption of N2, dynamic light scattering, and scanning electron microscopy. The adsorption capacity of the organoclay was measured by its mixing with contaminated kaolin and soil samples and by analysis of heavy metal contents in leachate. Deionized water and 50% acetic acid were used for leaching of metals from the samples. As it was demonstrated by the experiments, the adsorbent was efficient in immobilization of heavy metals not only in neutral aqueous media but also in the presence of weak acid. As a result, the adsorbent can be used for reduction of heavy metal leaching from contaminated sites.
Citation Information
Brown, Loren; Seaton, Kenneth; Mohseni, Ray; and Vasiliev, Aleksey. 2013. Immobilization of Heavy Metals on Pillared Montmorillonite With a Grafted Chelate Ligand. Journal of Hazardous Materials. Vol.261 181-187. https://doi.org/10.1016/j.jhazmat.2013.07.024 PMID: 23921181 ISSN: 0304-3894