%0 Journal Article %T Removal of Cu (II), Ni (II), Cd (II) AND Cr (VI) ions from aqueous Solutions by biosorption processes %A ASLAN, S. %A BOZKURT, Z. %A N. TEKELİ, A. %J Sigma Journal of Engineering and Natural Sciences %D 2007 %V 25 %P 209-222 %R