Synergistic catalysis of immobilized enzyme and peroxymonosulfate activation: CuFe2O4/kaolin-CTS-Laccase for enhanced performance of reactive blue 19 degradation

IF 4.9 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2024-11-19 DOI:10.1016/j.colsurfa.2024.135784

Lingyun Jing , Xinyong Li , Jixiang Chen , Rui Quan , Tong Wang , Xia Zhao , Wenhan Yang , Shasha Liu , Yeqiang Hu , Zhili Sun , Pengbo Hao , Hui Yang , Yinqin Zheng , Hao Zhu

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引用次数: 0

Abstract

This work constructed an immobilized laccase - peroxymonosulfate (PMS) activation synergistic catalytic system for enhancing the efficient removal of reactive blue 19 (RB19). Superparamagnetic CuFe₂O₄/kaolin (CF/K) composites were prepared by one-step solvothermal and calcination methods and then modified with chitosan as immobilized carriers for laccase. The enzyme activity of CuFe₂O₄/kaolin-CTS-Laccase (CF/K-CTS-Lac) could reach 316.3 U/g under optimal immobilization conditions of 3 h and 2.6 mg/mL. CF/K-CTS-Lac exhibited improved pH stability and thermal stability in comparison to free laccase. The CF/K-CTS-Lac/PMS synergistic catalytic system achieved 98.4 % decolourization of RB19 within 90 min, which was 1.7 and 1.9 times higher than that of the CF/K-CTS-Lac system and CF/K-CTS/PMS system, respectively. Enhanced RB19 degradation efficiency attributed to synergistic catalysis by immobilized laccase and PMS activation. Free radical quenching experiments showed that hydroxyl radicals (•OH), sulfate radicals (SO₄^•-), superoxide radicals (•O₂^-) and singlet oxygen (¹O₂) were involved in the synergistic catalytic system, with •O₂^- and ¹O₂ playing a major role. Our investigations are expected to provide new insights into the construction of synergistic catalytic systems for pollutants.

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固定化酶与过硫酸盐活化的协同催化：提高活性蓝 19 降解性能的 CuFe2O4/kaolin-CTS-Laccase

本研究构建了一种固定化漆酶-过氧单硫酸盐（PMS）活化协同催化体系，以提高活性蓝 19（RB19）的去除效率。研究采用溶热法和煅烧法一步法制备了超顺磁性 CuFe2O4/kaolin (CF/K) 复合材料，然后用壳聚糖修饰，作为固定化漆酶的载体。在3 h和2.6 mg/mL的最佳固定条件下，CuFe2O4/高岭土-CTS-漆酶（CF/K-CTS-Lac）的酶活性可达316.3 U/g 。与游离漆酶相比，CF/K-CTS-Lac 具有更好的 pH 稳定性和热稳定性。CF/K-CTS-Lac/PMS协同催化体系在90分钟内对RB19的降解率达到98.4%，分别是CF/K-CTS-Lac体系和CF/K-CTS/PMS体系的1.7倍和1.9倍。RB19 降解效率的提高归因于固定化漆酶和 PMS 活化的协同催化作用。自由基淬灭实验表明，羟自由基（-OH）、硫酸根自由基（SO4--）、超氧自由基（-O2-）和单线态氧（1O2）参与了协同催化体系，其中-O2-和1O2发挥了主要作用。我们的研究有望为构建污染物协同催化系统提供新的见解。

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来源期刊

Colloids and Surfaces A: Physicochemical and Engineering Aspects 化学-物理化学

CiteScore

8.70

自引率

9.60%

发文量

2421

审稿时长

56 days

期刊介绍： Colloids and Surfaces A: Physicochemical and Engineering Aspects is an international journal devoted to the science underlying applications of colloids and interfacial phenomena. The journal aims at publishing high quality research papers featuring new materials or new insights into the role of colloid and interface science in (for example) food, energy, minerals processing, pharmaceuticals or the environment.