7.  Chitosan Impregnated with Phosphonium Groups Used To Strontium Adsorption

Authors: L. Lupa, P. Negrea, A. Popa and M. Butnariu


Abstract:

In this work it was studied the removal of strontium ions from aqueous solution through adsorption onto a biopolymer, chitosan, impregnated with butyltriphenylphosphonium bromide. The impregnation of the butyltriphenylphosphonium bromide onto the chitosan was realised through ultrasonication. The energy dispersive EDX applied to the obtained adsorbents proved the fact that the biopolymer support was impregnated with the studied butyltriphenylphosphonium bromide. The impregnated chitosan developed a maximum adsorption capacity in the removal process of Sr2+ ions from aqueous solution of 2.65 mg Sr2+/g of adsorbent. The equilibrium between the adsorbent and adsorbate was achieved in 60 minutes.


Keywords: chitosan, adsorption, biopolymer

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