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Origin of synergistic effect between Fe/Mn minerals and biochar for peroxymonosulfate activation by Chunyu Du; Shengjiong Yang; Dahu Ding; Tianming Cai; Rongzhi Chen is a scholarly article available to read on EtoBox.

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Biochar possesses attractive structural (highly porous) and chemical (abundant functional groups) properties, exhibiting promising future in diverse applications such as soil amendment and environmental remediation. However, the interaction between biochar and soil active minerals, especially the synergistic effect on peroxymonosulfate (PMS) activation is largely unknown. In this study, we focused on the origin of the observed synergistic effect between biochar and two typical soil active minerals, i.e., goethite (α-FeOOH) and birnessite (δ-MnO2) on the activation of PMS by preparing four mineral-biochar composites, i.e., GBC350, BBC350, GBC700, and BBC700. Interestingly, BBC350, BBC700, and GBC700 exhibited distinct synergistic effects for BPA removal, whilst no obvious synergistic effect was observed for GBC350. The theoretical calculations based on density functional theory (DFT) further confirmed the improved PMS adsorption affinity, ascribing to the delocalization of O electrons (in PMS) to the π bond in C-layer. Furthermore, non-radical regime was elucidated to dominate the BPA oxidation. Mineral species could establish an electron channel between oxidant and catalyst, thus a

Author

Chunyu Du; Shengjiong Yang; Dahu Ding; Tianming Cai; Rongzhi Chen

Publisher

Elsevier BV

Published

2023

Language

EN