Title

Adsorption Of Heavy Metals In Glacial Till Soil

Keywords

Adsorption; Clays; Electrokinetics; Heavymetals; Remediation; Soil; Zeta potential

Abstract

The charged sites on soil particles are important for the retention/ adsorption of metals. Metallic counterions can neutralize the intrinsic charges on the surfaces of soil particles by forming complexes. In this study, efforts have been made to determine the effect of surface potential, pH, and ionic strength on the adsorption of four metal ions, hexavalent chromium Cr(VI), trivalent chromium Cr(III), nickel Ni(II) and cadmium Cd(II), in glacial till soil. Batch tests were performed to determine the effect of pH (2-12) and ionic strength (0.001-0.1 M KCl) on zeta potential of the glacial till soil. The point of zero charge (pHPZC) of glacial till was found to be 7.0±2.5. Surface charge experiments revealed the high buffering capacity of the glacial till. Batch adsorption experiments were conducted at natural pH (8.2) using various concentrations of selected metals. The adsorption data was described by the Freundlich adsorption model. Overall glacial till shows lower adsorption affinity to Cr(VI) as compared to cationic metals, Cr(III), Ni(II) and Cd(II). © Springer 2006.

Publication Date

12-1-2006

Publication Title

Geotechnical and Geological Engineering

Volume

24

Issue

6

Number of Pages

1679-1693

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1007/s10706-005-5560-6

Socpus ID

33751008645 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/33751008645

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