MilliporeSigma

Lead isotopic compositions of ash sourced from Australian bushfires.

Environmental pollution (Barking, Essex : 1987) (2014-04-26)
Louise J Kristensen, Mark Patrick Taylor, Kingsley O Odigie, Sharon A Hibdon, A Russell Flegal
ABSTRACT

This study identifies natural and industrial lead remobilized in ash deposits from three bushfires in relatively pristine areas of Australia in 2011 using lead isotopic compositions ((208)Pb/(207)Pb; (206)Pb/(207)Pb). Lead concentrations in the ash ranged from 1 to 36 mg/kg, bracketing the range of lead (4-23 mg/kg) in surface soils (0-2 cm), subsurface (40-50 cm) soils and rocks. The lead isotopic compositions of ash and surface soil samples were compared to subsurface soils and local bedrock samples. The data show that many of the ash and surface soil lead isotopic compositions were a mixture of natural lead and legacy industrial lead depositions (such as leaded petrol combustion). However, some of the ash samples at each of the sites had lead isotopic compositions that did not fit a simple two end-member mixing model, indicating other, unidentified sources.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Lead, shot, <2 mm, 99.9% trace metals basis
Sigma-Aldrich
Lead, powder, −100 mesh, 99.95% trace metals basis
Sigma-Aldrich
Lead, shot, 1-3 mm, 99.995% trace metals basis
Lead, foil, not light tested, 25x25mm, thickness 0.0125mm, 99.99+%
Lead, foil, light tested, 50x50mm, thickness 0.05mm, as rolled, 97% (Sn 1.5%, Sb 1.5%)
Lead, foil, light tested, 50x50mm, thickness 0.01mm, 99.99+%
Lead, foil, 2m coil, thickness 0.125mm, as rolled, 99.95%
Lead, foil, 25mm disks, thickness 0.25mm, as rolled, 99.95%
Lead, foil, 2m coil, thickness 0.5mm, as rolled, 99.95%
Lead, foil, 2m coil, thickness 0.12mm, coil width 25.4mm, as rolled, 99.95%
Lead, foil, 25mm disks, thickness 0.1mm, as rolled, 99.95%
Lead, foil, 2m coil, thickness 0.15mm, as rolled, 99.95%
Lead, foil, 4mm disks, thickness 0.0125mm, 99.99+%
Lead, foil, 25mm disks, thickness 0.55mm, as rolled, 100%
Lead, foil, 2m coil, thickness 1.0mm, as rolled, 99.95%
Lead, foil, 2m coil, thickness 0.25mm, as rolled, 99.95%
Lead, foil, 4mm disks, thickness 0.01mm, 99.99+%
Lead, foil, 25mm disks, thickness 0.5mm, as rolled, 99.95%
Lead, foil, 25mm disks, thickness 0.25mm, as rolled, 99.99+%
Lead, foil, 4mm disks, thickness 0.25mm, as rolled, 99.99+%
Lead, foil, 15mm disks, thickness 0.25mm, as rolled, 99.95%
Lead, foil, 10mm disks, thickness 0.5mm, as rolled, 99.95%
Lead, foil, 25mm disks, thickness 0.025mm, 99.99+%
Lead, foil, 15mm disks, thickness 0.006mm, 99.99+%
Lead, foil, 10mm disks, thickness 0.015mm, 99.99+%
Lead, foil, 50x50mm, thickness 6.0mm, as rolled, 99.99+%
Lead, foil, 10mm disks, thickness 0.02mm, 99.99+%
Lead, foil, 50mm disks, thickness 0.5mm, as rolled, 99.95%
Lead, foil, 1m coil, thickness 0.15mm, as rolled, 99.95%
Lead, foil, 6mm disks, thickness 0.008mm, 99.99+%