Kinetics of Peroxidase Catalyzed Decoloration of Orange II. with Hydrogen Peroxide

Abstract

The decoloration rate of Orange II is measured at 20°C and pH 9.0 in the presence of hydrogen peroxide and such peroxidases (POD) as horseradish POD (HRP), POD from soybean (SPO), and arthromyces ramosus POD (ARP). The decoloration rate of Orange II is expressed as pseudo-first order reaction kinetics for all PODS used. The rate constants increase in the following order. SPO < HRP < ARP. Rate constant values for HRP and ARP are much greater than that for percarbonate. The differences in rate constants between PODS can be explained in terms of the different reactivities of POD-interme diates for Orange II.

Application of low-cost adsorbents for dye removal – A review

“…About 50% of the world's production of hydrogen peroxide in 1994 was used for paper and pulp bleaching (Hage and Lienke, 2006). Hydrogen peroxide is also used for making peroxidase enzymes, which are used for decolourisation of dyes (Morita et al, 1996). However, the process is pH dependent and produces sludge.…”

Hydrogen peroxide generation with immobilized glucose oxidase for textile bleaching

“…Trials to activate the enzymatically produced peroxide were performed in three ways: pH 11 at 95°C (classical approach); peroxidase (E.C. 1.11.1.7) from Horseradish (Sigma), 0.1 mg l − 1 , pH 5, 55°C (Morita and Ito, 1996;Damhus et al, 1991), and sodium persulfate 10 g l − 1 , pH 11, room temperature (Letcher et al, 1994). The bleaching experiments were carried out for 1 h in an Ahiba Spectradye Dyeing apparatus (Datacolor International).…”

Laccases to Improve the Whiteness in a Conventional Bleaching of Cotton

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