@article {LAI2021119559, title = {Activation of peroxydisulfate by V-Fe concentrate ore for enhanced degradation of carbamazepine: Surface =V(III) and =V(IV) as electron donors promoted the regeneration of =Fe(II)}, journal = {Applied Catalysis B: Environmental}, volume = {282}, year = {2021}, pages = {119559}, abstract = {V-Fe concentrate ore was applied to activate peroxydisulfate (PDS) for carbamazepine (CBZ) degradation. The excellent performance of V-Fe concentrate ore was mainly ascribed to the quick electron transfer from surface =V(III) and =V (IV) to =Fe(III) for =Fe(II) regeneration, which was confirmed by XPS and XAS analyses. This accelerated =Fe(II) regeneration could thus lead to quick formation of HO, SO4-, O2- and effective degradation of CBZ. The degradation rate of CBZ could be also expressed by a kinetic model, i.e., -d[CBZ]/dt = (0.83 mM-0.55 min-1(g/L)-0.65) [CBZ]0.29[PDS]1.26[V-Fe]0.65. Combined with the measured intermediates and the results of DFT calculation, CBZ degradation pathway was proposed systematically. Moreover, this catalyst displayed excellent recyclability and general applicability for a broad substrate scope. This study suggests low valent vanadium makes crucial contributions to the high activity of V-Fe-based catalysts, and improves the understanding of electron transfer mechanism between V and Fe in PDS activation process.}, keywords = {Carbamazepine, Degradation pathways, Electron, kinetics, Transfer}, issn = {0926-3373}, doi = {http://doi.org/10.1016/j.apcatb.2020.119559}, url = {http://www.sciencedirect.com/science/article/pii/S0926337320309747}, author = {Leiduo Lai and Ji, Haodong and Heng Zhang and Liu, Rui and Chenying Zhou and Liu, Wen and Zhimin Ao and Naiwen Li and Liu, Chao and Gang Yao and Bo Lai} }