Kinetics of Adsorbable Organic Halides (AOX) Reduction in Laccase-Aided Chlorine Dioxide Bleaching of Bagasse Pulp

• Main Authors: Xueping Song, Yong Pei, Jingjing Su, Chengrong Qin, Shuangfei Wang, Shuangxi Nie
• Format: Article
• Language: English
• Published: North Carolina State University 2016-07-01
• Series: BioResources
• Subjects: Kinetic model; Laccase; AOX; ECF; Bagasse soda pulp
• Online Access: http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_11_3_7462_Song_Kinetics_Adsorbable_Organic_Halides

This paper presents a kinetic model of the laccase-aided chlorine dioxide bleaching of bagasse pulp. The kinetic model was based on the rate of reduction of adsorbed organic halogen (AOX). The effects of the laccase enzyme dosage, the mediator 1-hydroxybenzotriazole (HBT) dosage, and the reaction temperature on the AOX content of the bleaching effluent are discussed. Good fits were obtained for the experimental data obtained from the different laccase enzyme dosages, HBT dosages, and reaction temperatures, indicating the feasibility of the kinetic model as a means of predicting the optimal operation conditions for the laccase-aided chlorine dioxide bleaching of bagasse pulp in the future.