Simultaneous adsorption-degradation of organic dyes using MnFe2O4/calcium alginate nano-composites coupled with GOx and laccase

被引：27

作者：

Shojaat, Rahim ^{[1
]}

Saadatjoo, Naghi ^{[1
]}

Karimi, Afzal ^{[2
]}

Aber, Soheil ^{[3
]}

机构：

[1] Semnan Univ, Fac Chem, Dept Appl Chem, Semnan, Iran

[2] Iran Univ Med Sci, Fac Adv Technol Med, Dept Biotechnol, Tehran, Iran

[3] Univ Tabriz, Fac Chem, Dept Appl Chem, Res Lab Environm Protect Technol, Tabriz, Iran

来源：

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING | 2016年 / 4卷 / 02期

关键词：

Adsorbent; Decolorization; Enzyme; Wastewater treatment;

D O I：

10.1016/j.jece.2016.02.029

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In this study, glucose oxidase and laccase enzymes were immobilized on MnFe2O4 nanoparticles, which were synthesized by co-precipitation method. The nanocomposites of glucose oxidase/MnFe2O4/calcium alginate, laccase/MnFe2O4/calcium alginate, and MnFe2O4/calcium alginate were prepared by trapping enzyme/nanoparticles in calcium alginate. The size, morphology and crystallite phase of MnFe2O4 nanoparticles were investigated by SEM and XRD techniques, respectively. FT-IR spectroscopy was used to examine the functional groups of the nanoparticles before and after the immobilization of each enzyme. Also, prepared absorbents were applied for the decolorization of three model dye wastewaters of methylene blue, indigo and acid red 14. Decolorization of these dyes at pH 7 by laccase/MnFe2O4/calcium alginate during 1 h was observed 82.13, 25.09, and 20.42%, respectively. The maximum amount of decolorization of indigo and acid red 14 dyes at pH 5 and 3 by glucose oxidase/MnFe2O4/calcium alginate for 1 h were 44.03 and 46.5%, respectively; and decolorization of methylene blue at pH 9 after 3 h reached 93.46%. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：1722 / 1730

页数：9

共 40 条

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