ABSTRACT
In so ils, ch ro m iu m m ay ex is t in o n e o f tw o o x id a tio n sta tes: С г(П Ӏ) and C r(V I). U n lik e m o st C r(V I) species, C r(III) is n o n -to x ic an d is c o n s id e red an e s sen tia l tra c e e lem en t fo r g lu c o se m e tab o lism in h u m an s an d a n im a ls [4 ,2 ]. A n o th e r p ro b lem asso c ia te d w ith C r(V I) is its h ig h m o b ility in th e so il-w a te r en v iro n m en t. C on v erse ly , th e С г(ІП ) species is le ss m o b ile th a n its C r(V I) co u n terp art.
