TY  - JOUR
AU  - Chen, Zhihui
AU  - Yao, Jun
AU  - Šolević Knudsen, Tatjana
AU  - Ma, Bo
AU  - Liu, Bang
AU  - Li, Haoa
AU  - Zhu, Xiaozhe
AU  - Zhao, Chenchen
AU  - Pang, Wancheng
AU  - Cao, Ying
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5267
AB  - 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.
PB  - Elsevier
T2  - Chemical Engineering Journal
T1  - Degradation of novel mineral flotation reagent 8-hydroxyquinoline by superparamagnetic immobilized laccase: Effect, mechanism and toxicity evaluation
VL  - 432
SP  - 134239
DO  - 10.1016/j.cej.2021.134239
ER  - 

@article{
author = "Chen, Zhihui and Yao, Jun and Šolević Knudsen, Tatjana and Ma, Bo and Liu, Bang and Li, Haoa and Zhu, Xiaozhe and Zhao, Chenchen and Pang, Wancheng and Cao, Ying",
year = "2022",
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.",
publisher = "Elsevier",
journal = "Chemical Engineering Journal",
title = "Degradation of novel mineral flotation reagent 8-hydroxyquinoline by superparamagnetic immobilized laccase: Effect, mechanism and toxicity evaluation",
volume = "432",
pages = "134239",
doi = "10.1016/j.cej.2021.134239"
}

Chen, Z., Yao, J., Šolević Knudsen, T., Ma, B., Liu, B., Li, H., Zhu, X., Zhao, C., Pang, W.,& Cao, Y.. (2022). Degradation of novel mineral flotation reagent 8-hydroxyquinoline by superparamagnetic immobilized laccase: Effect, mechanism and toxicity evaluation. in Chemical Engineering Journal
Elsevier., 432, 134239.
https://doi.org/10.1016/j.cej.2021.134239

Chen Z, Yao J, Šolević Knudsen T, Ma B, Liu B, Li H, Zhu X, Zhao C, Pang W, Cao Y. Degradation of novel mineral flotation reagent 8-hydroxyquinoline by superparamagnetic immobilized laccase: Effect, mechanism and toxicity evaluation. in Chemical Engineering Journal. 2022;432:134239.
doi:10.1016/j.cej.2021.134239 .

Chen, Zhihui, Yao, Jun, Šolević Knudsen, Tatjana, Ma, Bo, Liu, Bang, Li, Haoa, Zhu, Xiaozhe, Zhao, Chenchen, Pang, Wancheng, Cao, Ying, "Degradation of novel mineral flotation reagent 8-hydroxyquinoline by superparamagnetic immobilized laccase: Effect, mechanism and toxicity evaluation" in Chemical Engineering Journal, 432 (2022):134239,
https://doi.org/10.1016/j.cej.2021.134239 . .