Remediacija zemljine z območja stare cinkarne v Celju z metodo stabilizacije s cementom

Metka UDOVIČ; Domen LEŠTAN

doi:10.14720/aas.2008.91.1.15398

Authors

Metka UDOVIČ Biotehniška fakulteta UL, Oddelek za agronomijo, Center za pedologijo in varstvo okolja, Jamnikarjeva 101, 1000 Ljubljana, Slovenija
Domen LEŠTAN Biotehniška fakulteta UL, Oddelek za agronomijo, Center za pedologijo in varstvo okolja, Jamnikarjeva 101, 1000 Ljubljana, Slovenija

DOI:

https://doi.org/10.14720/aas.2008.91.1.15398

Keywords:

Heavy metals, stabilization, cement, bioacessibility, mobility

Abstract

Five representitative samples of heavily polluted soil from a former industrial area in Celje (Slovenia) containing 7300 - 17200 mg kg-1 total Pb, 6000 - 63600 mg kg-1 total Zn and 24 - 250 mg kg-1 total Cd were remediated with the stabilization method with 15 % (w/w) portland cement. After 4 months of stabilization the mobility of Pb, Zn and Cd assessed with Toxicity Characteristic Leaching Procedure (TCLP) decreased by factors 5.8 - 17.4, 8.1 - 35.8 and 4.3 - 7.3, respectively. Potential availability of Pb, Zn and Cd for plants assessed with dietilentriaminpentaacetic acid (DTPA) extraction decreased by factors 1.6 - 9.8, 1.1 - 2.1 and 1.3 - 4.1 after stabilization, respectively. Bioacessibility of Pb assessed with a physiologically based extraction test (PBET) decreased after stabilization by factors up to 11.3 in the small intestine fraction.