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  • Geochemical associations and availability of cadmium (Cd) in a paddy field system, northwestern Thailand.

Geochemical associations and availability of cadmium (Cd) in a paddy field system, northwestern Thailand.

Environmental pollution (Barking, Essex : 1987) (2014-02-08)
Peerapat Kosolsaksakul, John G Farmer, Ian W Oliver, Margaret C Graham
ABSTRACT

The Mae Tao watershed, northwest Thailand, has become contaminated with cadmium (Cd) as a result of zinc ore extraction (Padaeng deposit) in the nearby Thanon-Thongchai mountains. Consumption of contaminated rice has led to documented human health impacts. The aim of this study was to elucidate transfer pathways from creek and canal waters to the paddy field soils near Baan Mae Tao Mai village and to determine the relationship between Cd speciation in the soil and uptake by rice plants. Transfer mainly occurred in association with particulate matter during flooding and channel dredging and, in contrast with many other studies, most of the soil Cd was associated with exchangeable and carbonate-bound fractions. Moreover, there was a linear relationship between soil total Cd and rice grain Cd (R(2) = 0.715), but a stronger relationship between both the Tessier-exchangeable soil Cd and the BCR-exchangeable soil Cd and rice grain Cd (R(2) = 0.898 and 0.862, respectively).

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Cadmium, shot, 3 mm, 99.999% trace metals basis
Pricing and availability is not currently available.
Sigma-Aldrich
Cadmium, granular, ≥99%, 5-20 mesh
Pricing and availability is not currently available.
Sigma-Aldrich
Cadmium, granular, 30-80 mesh, ≥99%
Pricing and availability is not currently available.
Sigma-Aldrich
Cadmium, powder, −100 mesh, 99.5% trace metals basis
Pricing and availability is not currently available.
Cadmium, foil, not light tested, 25x25mm, thickness 0.01mm, 99.7+%
Pricing and availability is not currently available.
Cadmium, foil, not light tested, 50x50mm, thickness 0.005mm, 99.7+%
Pricing and availability is not currently available.
Cadmium, foil, 8mm disks, thickness 0.05mm, as rolled, 99.99+%
Pricing and availability is not currently available.
Cadmium, foil, 50mm disks, thickness 0.5mm, as rolled, 99.95%
Pricing and availability is not currently available.
Cadmium, tube, 100mm, outside diameter 2.29mm, inside diameter 1.27mm, wall thickness 0.51mm, 99.95+%
Pricing and availability is not currently available.
Cadmium, foil, not light tested, 25x25mm, thickness 0.025mm, 99.7+%
Pricing and availability is not currently available.
Cadmium, foil, light tested, 100x100mm, thickness 0.025mm, 99.7+%
Pricing and availability is not currently available.
Cadmium, foil, 6mm disks, thickness 0.25mm, as rolled, 99.95%
Pricing and availability is not currently available.
Cadmium, wire reel, 0.1m, diameter 0.5mm, hard, 99.99+%
Pricing and availability is not currently available.
Cadmium, rod, 150mm, diameter 10.0mm, as drawn, 99.99+%
Pricing and availability is not currently available.
Cadmium, foil, light tested, 50x50mm, thickness 0.05mm, as rolled, 99.99+%
Pricing and availability is not currently available.
Cadmium, foil, 8mm disks, thickness 0.125mm, as rolled, 99.95%
Pricing and availability is not currently available.
Cadmium, foil, 50mm disks, thickness 1.0mm, as rolled, 100%
Pricing and availability is not currently available.
Cadmium, rod, 500mm, diameter 5.0mm, as drawn, 99.99+%
Pricing and availability is not currently available.
Cadmium, foil, light tested, 100x100mm, thickness 0.05mm, as rolled, 99.99+%
Pricing and availability is not currently available.
Cadmium, foil, 6mm disks, thickness 0.25mm, as rolled, 99.99+%
Pricing and availability is not currently available.
Cadmium, foil, not light tested, 100x100mm, thickness 0.005mm, 99.7+%
Pricing and availability is not currently available.
Cadmium, foil, 8mm disks, thickness 0.125mm, as rolled, 99.99+%
Pricing and availability is not currently available.
Cadmium, foil, 6mm disks, thickness 0.005mm, 99.7+%
Pricing and availability is not currently available.
Cadmium, foil, 6mm disks, thickness 0.125mm, as rolled, 99.95%
Pricing and availability is not currently available.
Cadmium, tube, 500mm, outside diameter 2.29mm, inside diameter 1.27mm, wall thickness 0.51mm, 99.95+%
Pricing and availability is not currently available.
Cadmium, foil, not light tested, 50x50mm, thickness 0.002mm, 99.7+%
Pricing and availability is not currently available.
Cadmium, foil, light tested, 25x25mm, thickness 0.005mm, 99.7+%
Pricing and availability is not currently available.
Cadmium, foil, 6mm disks, thickness 0.5mm, as rolled, 99.95%
Pricing and availability is not currently available.
Cadmium, rod, 200mm, diameter 5.0mm, as drawn, 99.99+%
Pricing and availability is not currently available.
Cadmium, foil, not light tested, 100x100mm, thickness 0.015mm, 99.7+%
Pricing and availability is not currently available.