Remediation of Soil Contamination with Heavy Metals by Using Zeolite and Humic Acid Additives

Abstract

Soil remediation at contaminated sites very often needs customized approach, because of the different content of pollutants. Various technologies from simple soil excavation and transporting to hazardous waste landfills to different kinds of remediation by vitrification and the use of additives can be used for the treatment of soil. A series of remediation experiments using zeolites and humic acids were applied to soil contaminated with copper. Remediation can be performed with easily available additive materials of natural origin found near the place of application, in order to diminish the leaching of contaminants. Soils contaminated and spiked with copper were mixed with additives, and ion selective electrode potentiometry was used in order to establish the stability constants of humic-metal complexes. Thus the study provides an opportunity to gain information on the fate of copper variously mixed with potential remediation agents -zeolites and humic acids -as additives to contaminated soils.

Different Type Clay Amendments for Lead Immobilization in Contaminated Soils

“…Leaching from contaminated soil with Devonian Lode raw clay amendment in Latvia has been already studied for copper [17]. The aim of the study is to compare different types of raw and modified clays as soil amendments by lead immobilization properties.…”

Devonian Clay Modification for the Improvement of Heavy Metal Sorption Properties

“…The mass of clay also decreases by 25-30% through this type of treatment. Devonian clays used in these series of batch tests as soil amendment were studied in [27], where stability constants of ligands were studied considering the contamination of copper in soils. This study was dedicated to clay modification by nitric acid as well as Ca and Na salts in order to prepare surface modified forms and their potential towards nickel [Pb(II)] sorption considering the ion exchange mechanism.…”