Superoxide radicals mediated by high-spin Fe catalysis for organic wastewater treatment.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 39102537.
- Also identified by DOI 10.1073/pnas.2407012121 and PMC identifier 11331139.
- Licence recorded as CC BY-NC-ND.
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Abstract
Water resources are indispensable basic resources and important environmental carriers; the presence of organic contaminants in wastewater poses considerable risks to the health of both humans and ecosystems. Although the Fenton-like reactions using H<sub>2</sub>O<sub>2</sub> as the oxidant to destroy organic pollutants are attractive, there are still challenges in improving reaction activity under neutral or even alkaline conditions. Herein, we designed a H<sub>2</sub>O<sub>2</sub> activation pathway with O<sub>2</sub><sup>•-</sup> as the main active species and elucidated that the spin interaction between Fe sites and coordinated O atoms effectively promotes the generation of the key intermediate Fe-*OOH. Furthermore, we successfully captured and analyzed the Fe-*OOH intermediate by in situ Raman spectroscopy. When applying FBOB to a continuous-flow reactor, CIP removal efficiency remained at around 90% within 600 min of continuous operation, achieving excellent efficiency, stability, and pH tolerance in removing pollutants.