Organosolv lignin/Fe3O4 nanoparticles applied as a β-glucosidase immobilization support and adsorbent for textile dye removal

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作者：
de Araújo Padilha, Carlos Eduardo [1 ]
da Costa Nogueira, Cleitiane [1 ]
de Santana Souza, Domingos Fabiano [2 ]
de Oliveira, Jackson Araújo [2 ]
dos Santos, Everaldo Silvino [1 ]
机构：
[1] Laboratory of Biochemical Engineering, Chemical Engineering Department, Federal University of Rio Grande do Norte (UFRN), Natal,RN, Brazil
[2] Laboratory of Alternative Energy and Transport Phenomena, Chemical Engineering Department, Federal University of Rio Grande do Norte (UFRN), Natal,RN, Brazil
来源：
Industrial Crops and Products | 2020年 / 146卷
关键词：
In this paper; the liquor obtained from organosolv pretreatment of green coconut fiber (GCF) was used for the synthesis of lignin/Fe3O4 nanoparticles. The coating of Fe3O4 nanoparticles was evaluated by X-ray and dynamic light scattering analysis. β-glucosidase immobilized on lignin/Fe3O4 nanoparticles by covalent bonding exhibited better stability than free enzyme. Compared to the free enzyme; β-glucosidase immobilized on lignin/Fe3O4 nanoparticles achieved good digestibility performance of crystalline cellulose (∼ 21.9 g/L reducing sugars) and delignified GCF (∼ 6.4 g/L reducing sugars). In adsorption experiments; lignin/Fe3O4 nanoparticles exhibited low equilibration time and high adsorption capacity of Methylene blue (203.66 mg/g); Cibacron blue (112.36 mg/g) and Remazol red (96.46 mg/g) dyes. After four cycles; the adsorption of the Methylene blue dye on lignin/Fe3O4 nanoparticles reduced 43.68 % using 0.1 M HCl as eluent. © 2020 Elsevier B.V;
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