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Non-isothermal kinetic modelling of potassium indigo-trisulfonate dye discolouration by Horseradish peroxidase
Biocatalysis and Biotransformation ( IF 1.8 ) Pub Date : 2020-04-22 , DOI: 10.1080/10242422.2020.1754806
Flávia Nunes Costa 1 , Diego Alex Mayer 1 , Alexsandra Valério 1 , Janaina de Souza Lima 1 , Débora de Oliveira 1 , Antônio Augusto Ulson de Souza 1
Affiliation  

Abstract Textile industries account for two-thirds of the total dyestuff market been responsible for the production of a large volume of effluent with unfixed dye. Aromatic dyes as potassium indigo-trisulfonate dye (PIT) are characterized as a chemically stable and complex molecule with high heat and light stability and with high toxicity even at low concentration. In order to evaluate an environmentally friendly method to remove potassium indigo-trisulfonate dye from aqueous solution, a commercial peroxidase (horseradish peroxidase, HPR) was used in the experimental and the data were modelled by the Arrhenius equation. According to the results, the best reaction conditions were obtained using 80 mg.L−1 of dye concentration, 45 °C, pH 5.0, 349.35 U.mL−1, and 4.5 mM hydrogen peroxide concentration leading to a 96% of dye discolouration.

中文翻译:

辣根过氧化物酶对靛蓝三磺酸钾染料变色的非等温动力学模型

摘要 纺织工业占整个染料市场的三分之二,负责生产大量未固色染料的废水。芳香族染料如靛蓝三磺酸钾染料 (PIT) 的特点是化学性质稳定且复杂的分子,具有高热稳定性和光稳定性,即使在低浓度下也具有高毒性。为了评估从水溶液中去除靛蓝三磺酸钾染料的环保方法,在实验中使用商业过氧化物酶(辣根过氧化物酶,HPR),并通过阿伦尼乌斯方程对数据进行建模。根据结果​​,使用 80 mg.L-1 染料浓度、45 °C、pH 5.0、349.35 U.mL-1 和 4.5 mM 过氧化氢浓度获得了最佳反应条件,导致 96% 的染料变色.
更新日期:2020-04-22
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