Novel combined amendments for sustainable remediation of the pb-contaminated soil

Abstract

Pressures exerted on the soil ecosystem due to its exposure to lead have a significant and aggravating effect on the quality of life. This study was conducted to investigate the aided phytostabilization of Pb-contaminated soils by novel combined amendments. The pot experiment was run under greenhouse conditions, using the following mixtures of immobilizing amendments: halloysite and limestone as well as halloysite and compost. The Pb contents in plants, both total and CaCl2-extractable Pb concentration in soil, were determined using the spectrophotometric method. The use of halloysite and compost was shown to be the most effective and decreased the average Pb content in the above-ground parts of F. rubra and in the soil and was found to significantly increase soil pH and Pb content in roots of the test plant. New methods should be developed to minimize the environmental risk posed by the presence of heavy metal pollutants. The results show significant effects of immobilizing amendments on the chemical characteristics of soil contaminated with Pb and the uptake of Pb by plants.