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EC number: 281-897-8
CAS number: 84057-80-7
Based on the key study of Ferrand et al.
(2006) (Klimisch 2), it can be concluded that there is no concern for
bioaccumulation of zirconium in terrestrial organisms, as all BSAF
values (obtained for roots and aerial parts of plants) were well below 1.
the study of Ferrand et al. (2006), transfer of zirconium from soil to
tomato and pea plants was studied during a 7-day exposure period in two
soils (an acidic and a calcareous soil) amended with either a soluble
(zirconium dichloride oxide or zirconium acetate) or an insoluble
zirconium compound (Zr(OH)4, covered by the ZrO2 registration dossier).
Zirconium accumulated mainly in the roots, with zirconium adsorption to
the root surface being of minor relevance. Translocation to aerial parts
was limited. BSAF values for roots were the highest for zirconium
acetate and the lowest for Zr(OH)4. They were all <= 0.1. BSAF values
for aerial parts were all <= 0.005 and were also generally the highest
for zirconium acetate and the lowest for Zr(OH)4. These values are
however all below 1, indicating that zirconium has a very limited
potential for bioaccumulation in terrestrial organisms.
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