Naslov
Amendment of metal-contaminated soil by biochar impacts metals release from the soil matrix & chemical speciation modelling in percolates

Autori
Ondrasek, Gabrijel ; Kranjcec, Filip ; Shepherd, Jonti ; Maurović, Nada ; Grčman, Helena ; Zupan, Marko ; Josip, Bagaric ; Horvatinec, Jelena

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
9th International Conference WATER FOR ALL / Habuda-Stanić, Mirna - Osijek, 2022, 63-63

ISBN
978-953-7005-85-6

Skup
9. međunarodni znanstveno-stručni skup: Voda za sve = 9th International Scientific and Professional Conference: Water for all

Mjesto i datum
Osijek, Hrvatska, 19.05.2022. - 20.05.2022

Vrsta sudjelovanja
Poster

Vrsta recenzije
Podatak o recenziji nije dostupan

Ključne riječi
Metal contaminated soil ; Biochar ; Chemical speciation modeling ; Metal sorption ; Metal leaching

Sažetak
Metal contaminated soils (MCS) pose a serious constraint to food production and human and environmental health. A controlled pot experiment was conducted with the different biochar types (derived from municipal sewage sludge – SL, wood chips – WC, and horse manure - HM) and their rates (1% and 4% w/w) to examine: i) release of metals from the MCS matrix (collected near a former Pb-Zn mine and Pb smelter plant near Zerjav, Slovenia) and ii) their chemical speciation in the water leachate 175 days after the incubation period. The highest Cd (0.07 mg/L) and Zn (0.95 mg/L) concentrations in percolates, followed by the lowest pH (6.52) were found in Control treatment (MSC without biochar addition). In addition, the highest Cu (0.17 mg/L) and Pb (0.45 mg/L), but the lowest Cd (0.04 mg/L) and Zn (0.63 mg/L) concentrations, followed by the highest pH (6.72), were found in WC treatment with 4%. Chemical speciation calculations performed in Visual Minteq software using the NICA-Donnan model indicated that Cu and Pb were present in all percolates as organo-complexes with dissolved organic carbon fractions. However, within the chemical pool of Cd and Zn, their free cationic forms (Cd2+, Zn2+) and chloro-complexes were confirmed in addition to organo complexes. Obtained results suggest that the amelioration of MCS with a particular biochar type could affect the transfer of metals from a contaminated matrix to waters.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

POVEZANOST RADA