Chitosan-functionalized supermagnetic halloysite nanotubes for covalent laccase immobilization

被引：69
|
作者：
Kadam, Avinash A. [1 ]
Jang, Jiseon [2 ]
Jee, Seung Cheol [3 ]
Sung, Jung-Suk [3 ]
Lee, Dae Sung [2 ]
机构：
[1] Dongguk Univ, Res Inst Biotechnol & Med Converged Sci, Biomedi Campus, Goyang Si 10326, Gyeonggi Do, South Korea
[2] Kyungpook Natl Univ, Dept Environm Engn, 80 Daehak Ro, Daegu 41566, South Korea
[3] Dongguk Univ Ilsan, Dept Life Sci, Biomedi Campus,32 Dongguk Ro, Goyang Si 10326, Gyeonggi Do, South Korea
来源：
CARBOHYDRATE POLYMERS | 2018年 / 194卷
基金：
新加坡国家研究基金会;
关键词：
Halloysite nanotubes; Chitosan; Laccase; Laccase-loaded nanotubular reactors; Nanobiocatalysis; Sustainable environmental cleanup; ENZYME IMMOBILIZATION; SURFACE MODIFICATION; CONTROLLED-RELEASE; CLAY NANOTUBES; NANOPARTICLES; REMOVAL; MICROSPHERES; DEGRADATION; OFLOXACIN; EFFICACY;
D O I：
10.1016/j.carbpol.2018.04.046
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Halloysite nanotubes (HNTs) were modified with supermagnetic Fe3O4 (M-HNTs) and functionalized with chitosan (CTA) (termed as M-HNTs-CTA). Furthermore, M-HNTs-CTA were cross-linked using glutaraldehyde and applied for covalent laccase immobilization (M-HNTs-CTA-Lac). Facile-synthesized modified HNTs were structurally characterized by scanning electron microscopy, high resolution transmission electron microscopy, X-ray photoelectron spectroscopy, and thermogravimetric analyses. M-HNTs-CTA-Lac exhibited 92.74 mg/g of laccase immobilization capacity and 92% of activity recovery. Biochemical properties of M-HNTs-CTA-Lac exhibited higher pH and temperature stabilities, with exceptional reusability capabilities until the 11th cycle. Moreover, M-HNTs-CTA-Lac exhibited 87% of 2,2'-azinobis (3-ethylbenzthiazoline-6-sulphonic acid) (ABTS)mediated Direct Red 80 (DR80) decolorization. By the 11th cycle, M-HNTs-CTA-Lac exhibited 33% DR80 decolorization. Therefore, M-HNTs-CTA can function as CTA-modified supermagnetic nonreactors for immobilization of biomacromolecules. The investigated M-HNTs-CTA-Lac are thus biocompatible and environment-friendly biocatalysts for degradation of textile waste, such as DR80, and can be rapidly retrieved from aqueous solution by a magnet after decontamination of environmental pollutants.
引用
收藏
页码：208 / 216
页数：9
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