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Environmental fate & pathways

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The inorganic susbtance is soluble at less than 1 mg/l in water and in the soluble form, will be dissociated. The behaviour in soil will therefore be depending on the counter ions present in the soil and the association of Cr3+ ions to the soild surface. This cannot be predicted from laboratory screening studies.

Chromium(III) in soil is mostly present as insoluble carbonate and oxide of chromium(III); therefore, it will not be mobile in soil. The solubility of chromium(III) in soil and its mobility may increase due to the formation of soluble complexes with organic matter in soil, with a lower soil pH potentially facilitating complexation (Avudainayagam et al. 2003).

Chromium has a low mobility for translocation from roots to the aboveground parts of plants (Calder 1988; Cary 1982; EPA 1984a, 1985a; King 1988; Stackhouse and Benson 1989).

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