Revisiting the contribution of FeIVO2+ in Fe(II)/peroxydisulfate system
Revisiting the contribution of FeIVO2+ in Fe(II)/peroxydisulfate system
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重新审视 FeIVO2 在 Fe(II)/过二硫酸盐体系中的贡献
DOI:
10.1016/j.cclet.2022.05.069
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发表时间:
2022-05
影响因子:
9.1
通讯作者:
Qi Yang
中科院分区:
文献类型:
--
作者:
Kunjie Hou;Peng Shen;Zhu Wang;Zhoujie Pi;Fei Chen;Xiaoming Li;Haoran Dong;Qi Yang
Recent studies have proposed that the high-valent iron species (such as Fe IV O 2+ ) rather than sulfate radical (SO 4 •− ) and hydroxyl radical ( • OH) are the main reactive oxidant species (ROS) in Fe(II)/peroxydisulfate (PDS) system with the methyl phenyl sulfoxide (PMSO) as the Fe IV O 2+ probe. However, many operational factors may interfere with the accuracy of this method, so the contribution of Fe IV O 2+ calculated by this method is controversial. In this study, the possible effect of Fe(II) concentration, pollutant type, reducing agent, or coexisted anions on Fe IV O 2+ production and its corresponding contribution to the removal of target pollutants in the Fe(II)/PDS system were investigated in detail, and the intrinsic mechanisms involved were also explored. This study shows that ROS generation is a complex process in the Fe(II)/PDS system, and multiple combinatorial approaches are urgently required to deeply explore the contribution of ROS to the elimination of target contaminants. ROS generation is a complex process in the Fe(II)/PDS system, single-probe technique applied to Fe IV O 2+ validation may cause unforeseen artifacts.
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