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.