Degradation of disperse dye from textile effluent by free and immobilized Cucurbita pepo peroxidase

¹ Université Mouloud Mammeri, Tizi-Ouzou, Algérie.
² Laboratoire de Biomateriaux et de Phenomènes de Transports, Université Dr. Yahia Fares, Médéa, ALGERIE
³ Laboratoire de Génie de la Réaction, Faculté de Génie Mécanique et Génie des Procédés, USTHB, Bab Ezzouar, Alger, 16111 ALGERIE
⁴ Laboratoire des Biotechnologies Environnementales et Génie des Procédés, BIOGEP, ENP, El-Harrach, ALGERIE

^a e-mail: na_boucherit@yahoo.fr

Abstract

Disperse dyes constitute the largest group of dyes used in local textile industry. This work evaluates the potential of the Cucurbita peroxidase(C-peroxidase) extracted from courgette in the decolourization of disperse dye in free and immobilized form. The optimal conditions for immobilization of C-peroxidase in Ca-alginate were identified. The immobilization was optimized at 2%(w/v) of sodium alginate and 0.2 M of calcium chloride. After optimization of treatment parameters, the results indicate that at pH 2, dye concentration: 80 mg/L(for FCP) and 180 mg/L(for ICP), H₂O₂ dose: 0,02M (for FCP) and 0,12M(for ICP), the decolourization by free and immobilized C-peroxidase were 72.02% and 69.71 % respectively. The degradation pathway and the metabolic products formed after the degradation were also predicted using UV–vis spectroscopy analysis.