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Degradation of novel mineral flotation reagent 8-hydroxyquinoline by superparamagnetic immobilized laccase: Effect, mechanism and toxicity evaluation
dc.creator | Chen, Zhihui | |
dc.creator | Yao, Jun | |
dc.creator | Šolević Knudsen, Tatjana | |
dc.creator | Ma, Bo | |
dc.creator | Liu, Bang | |
dc.creator | Li, Haoa | |
dc.creator | Zhu, Xiaozhe | |
dc.creator | Zhao, Chenchen | |
dc.creator | Pang, Wancheng | |
dc.creator | Cao, Ying | |
dc.date.accessioned | 2022-09-09T09:05:18Z | |
dc.date.available | 2022-09-09T09:05:18Z | |
dc.date.issued | 2022 | |
dc.identifier.issn | 1385-8947 | |
dc.identifier.issn | 1873-3212 | |
dc.identifier.uri | https://cer.ihtm.bg.ac.rs/handle/123456789/5267 | |
dc.description.abstract | The environmental impact of the mining industry requires efficient and eco-friendly technologies to mitigate the presence of mineral flotation reagents (MFRs) in mineral processing wastewater (MPW) prior to their discharge into the environment. In this work, for the first time, a robust, easily separable and reusable biocatalyst, Fe3O4@SiO2-NH2-Lac, was used for the degradation of a novel mineral flotation reagent 8-hydroxyquinoline (8-HQ). Under optimized conditions, Fe3O4@SiO2-NH2-Lac achieved 89.2% 8-HQ degradation efficiency within 6 h. The effect of the main constituents of MPW on 8-HQ degradation, including metal ions, organic solvents, surfactant, metal chelator and flotation frother was evaluated. The Fe3O4@SiO2-NH2-Lac also displayed favorable degradation efficiency of 8-HQ in real lead–zinc mine water. The biocatalyst could be easily recovered and had a satisfactory reusability, retaining 64.5% of 8-HQ degradation efficiency in the sixth reaction cycle. Identification of intermediate products revealed that Fe3O4@SiO2-NH2-Lac mediated reaction predominantly generated various structural 8-HQ oligomers/polymers. A potential degradation pathway for 8-HQ was speculated as follows: Fe3O4@SiO2-NH2-Lac initially catalyzed the oxidation of 8-HQ to yield the corresponding reactive radical intermediates, which subsequently undergone self-coupling reaction via C − C and C − O − C covalent coupling at their ortho and/or para positions, finally forming oligomers and polymers. The inhibition assays of marine bacterium (Vibrio fischeri) demonstrated that the toxicity of 8-HQ and its intermediate products was effectively reduced after Fe3O4@SiO2-NH2-Lac treatment. The results of this study might present an alternative immobilized laccase-based clean biotechnology for the clean-up and detoxification of 8-HQ contaminated MPW. | sr |
dc.language.iso | en | sr |
dc.publisher | Elsevier | sr |
dc.relation | National Natural Science Foundation of China (NSFC) 41720104007 | sr |
dc.relation | Major National R & D Projects for Chinese Ministry of Science and Technology 2019YFC1803500 | sr |
dc.relation | Ministry of Education of the People's Republic of China B21017 | sr |
dc.relation | info:eu-repo/grantAgreement/MESTD/inst-2020/200026/RS// | sr |
dc.relation | International Joint Scientific and Tech nical Collaboration between the People’s Republic of China and the Republic of Serbia (Project Number 4-18) | sr |
dc.rights | restrictedAccess | sr |
dc.source | Chemical Engineering Journal | sr |
dc.subject | 8-Hydroxyquinoline | sr |
dc.subject | Degradation mechanism | sr |
dc.subject | Laccase immobilization | sr |
dc.subject | Mineral flotation reagents | sr |
dc.subject | Toxicity assessment | sr |
dc.title | Degradation of novel mineral flotation reagent 8-hydroxyquinoline by superparamagnetic immobilized laccase: Effect, mechanism and toxicity evaluation | sr |
dc.type | article | sr |
dc.rights.license | ARR | sr |
dc.citation.volume | 432 | |
dc.citation.spage | 134239 | |
dc.citation.rank | aM21~ | |
dc.identifier.doi | 10.1016/j.cej.2021.134239 | |
dc.identifier.scopus | 2-s2.0-85121909668 | |
dc.identifier.wos | 000773397000001 | |
dc.type.version | publishedVersion | sr |