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UID:pretalx-soil-health-now-2026-YGXPRD@pretalx.earthmonitor.org
DTSTART;TZID=Europe/Athens:20261209T144500
DTEND;TZID=Europe/Athens:20261209T150000
DESCRIPTION:Irini Papageorgiou*\, Srimathie P. Indraratne\, Darshani Kumara
 gamage\, and Douglas M. Goltz \nThe University of Winnipeg\, Winnipeg\, MB
 \, Canada R3B 2E9\n\nMining and smelting activities have resulted in wides
 pread environmental contamination through the release of heavy metals and 
 other pollutants into soils\, water bodies\, and the atmosphere of boreal 
 forest soils with potentially toxic metals\, including cadmium (Cd) and zi
 nc (Zn). In Flin Flon\, Manitoba\, limestone has been commonly applied as 
 a remediation amendment to reduce soil acidity and improve site conditions
 \; however\, its effectiveness for direct metal immobilization remains poo
 rly understood. Biochar has emerged as a promising alternative due to its 
 high surface area\, alkalinity\, and metal sorption capacity. This study e
 valuates the effectiveness of limestone\, biochar\, and a 1:1 biochar–li
 mestone mixture for Cd and Zn immobilization under temperature conditions 
 representative of boreal environments. Batch adsorption studies were condu
 cted at 22°C and 4°C to evaluate Cd and Zn sorption kinetics\, adsorptio
 n capacities\, and the influence of temperature on amendment performance. 
 Preliminary results from Cd kinetic studies indicate that adsorption was g
 reater at 22°C than at 4°C for all amendments. Biochar exhibited the hig
 hest adsorption capacity and reached equilibrium rapidly\, while the bioch
 ar–limestone mixture showed intermediate performance. Limestone displaye
 d minimal Cd adsorption. These findings indicate that direct Cd retention 
 is primarily associated with biochar rather than limestone. Ongoing work i
 ncludes adsorption isotherm modeling for Cd and Zn\, surface characterizat
 ion of amendment–metal complexes\, and incubation studies evaluating ame
 ndment performance in contaminated boreal (pH = 5) soils under contrasting
  temperature regimes. It is anticipated that the combined amendment will p
 rovide complementary benefits by coupling the metal adsorption properties 
 of biochar with the pH-adjustment capacity of limestone. The results will 
 improve understanding of amendment mechanisms and support the development 
 of more effective remediation strategies for metal-contaminated boreal for
 est soils.
DTSTAMP:20260825T175940Z
LOCATION:Amphitheater II
SUMMARY:Influence of Biochar\, Limestone\, and Their Combination on Cadmium
  and Zinc Immobilization in Metal-Contaminated Boreal Soils. - Irini Papag
 eorgiou
URL:https://pretalx.earthmonitor.org/soil-health-now-2026/talk/YGXPRD/
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