Decolourisation of an anthraquinose dye with copper complexes

Abstract

Nowadays the research of friendly catalysts to be used in dyes decolourisation is an important target in the applied textile industry. In the presented work some copper complexes were prepared by immobilization of Cu (II) on a chitosan matrix. The oxidation of model textile dye ANTD (anthraquinone dye) catalyzed with hydrogen peroxide by these Cu complexes has been investigated. The reactivity of catalysts was dependent on the amount of the copper on the complex and the hydrogen peroxide in the reaction solution. The kinetics of ANTD oxidation was studied. Decolourisation efficiencies of four different complexes prepared were compared. The re-usability will be also study. In the best reaction conditions the anthraquinone dye decolourisation was over 95%. The re-usability of immobilized complexes has also studied. Our results lead us to assume that heterogeneous redox catalysis process will be an easy, cheap and useful way to remove textile dyes from wastewater effluents.