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摘要:
Tetrabromobisphenol A (TBBPA) that widely exists in soil and poses a potential threat to ecological environment urgently needs economically efficient remediation techniques. This study utilized both homogeneous Fe2+ solution and heterogeneous iron -based nanomaterials (chemically synthesized nano zero -valence iron (nZVI) and green -synthesized iron nanoparticles (G -Fe NPs)) to activate persulfate (PS) and assess their efficacy in degrading TBBPA in soil. The results demonstrate the superior performance of heterogeneous catalytic systems (WG-Fe NPs/PS (82.07%) and WnZVI/PS (78.32%)) over homogeneous catalytic system (WFe /PS (71.69%)), In addition, G -Fe NPs 2+ and nZVI effectively controlled the slow release of Fe2+. The optimization analysis using response surface methodology (RSM) reveal the remarkable significance of the experimental model based on the box-behnken design. RSM show that G -Fe NPs/PS exhibited optimal process parameters and predicted the maximum soil TBBPA degradation efficiency reaching 98.77%. The results of density functional theory calculations suggest that C-Br are the primary targets for electrophilic substitution reactions. Based on the f0 value and oG, the degradation pathway of TBBPA is inferred to involve a sequential debromination process, followed by the cleavage of intermediate carbon -carbon bonds and subsequent oxidation reactions. Hence, G -Fe NPs/PS not only facilitate waste resource utilization but also hold significant application potential.
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JOURNAL OF ENVIRONMENTAL MANAGEMENT
ISSN: 0301-4797
年份: 2024
卷: 354
8 . 7 0 0
JCR@2022
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