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EC number: 294-409-3
CAS number: 91722-09-7
Substance formed during processing of liquid steel or during production of iron castings. Consists primarily of fused silicates and trace elements as oxides as well as trace of alloying elements.
The Cr applied to agricultural soils in the form of slags used as fertilizers, was not bioaccumulated in agricultural crops.
To assess the applicability of slags as agricultural fertilizers, the
scientific work of 9 German Agricultural Research Stations was reviewed.
These stations applied BOS as a fertilizer for at least 11 and up to 88
years. On a hectare (ha) basis, 24 - 118 kg Cr/ha were applied in the
form of BOS. The theoretical, calculated increase of the soil Cr(total)
concentrations from 15 - 66 mg/kg soil in controls was 9 to 20 mg Cr/kg
soil. The measured increase was less, typically 2/3 of this value. Even
though soil became slightly enriched in Cr, no bioaccumulation occurred
in plants. In comparison to fields without fertilization by slags, there
was no difference in the Cr contents in plants from either of these
sites, suggesting that Cr is not bioaccumulated by agricultural crop
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