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Insights into the role of nanoscale zero‐valent iron in Fenton oxidation and its application in naphthalene degradation from water and slurry systems

Insights into the role of nanoscale zero‐valent iron in Fenton oxidation and its application in... INTRODUCTIONAdvanced oxidation processes (AOPs) have gained considerable attention recently as alternative methods to degrade the refractory organic pollutants due to the generation of reactive oxygen species (ROS) (Ateş & Argun, 2021; Cavalcanti et al., 2021; Tao et al., 2021). Among AOPs, Fenton oxidation using hydrogen peroxide (H2O2) as the oxidant is considered one of the best options for remediation of these pollutants. Fenton oxidation can degrade extensive organic micropollutants by producing hydroxyl radical (HO•), as shown in Equations 1–3, and improve the biodegradability of organisms (McQuillan et al., 2020; Wang et al., 2014; Wang & Wang, 2020). However, iron sludge, which was formed at the end of Fenton process and was considered as second pollution, and the consumption of significant amounts of reagents, in some cases, limited the application of Fenton oxidation (Wang et al., 2014).1FeII+H2O2→FeIII+OH–+HO•$$ \mathrm{Fe}\ \left(\mathrm{II}\right)+{\mathrm{H}}_2{\mathrm{O}}_2\to \mathrm{Fe}\ \left(\mathrm{II}\mathrm{I}\right)+{\mathrm{O}\mathrm{H}}^{\hbox{--} }+\mathrm{HO}\bullet $$2H2O2+HO•→H2O+HO2•$$ {\mathrm{H}}_2{\mathrm{O}}_2+\mathrm{HO}\bullet \to {\mathrm{H}}_2\mathrm{O}+{\mathrm{H}\mathrm{O}}_2\bullet $$3HO2•+H2O2→HO•+H2O+O2$$ {\mathrm{H}\mathrm{O}}_2\bullet +{\mathrm{H}}_2{\mathrm{O}}_2\to \mathrm{HO}\bullet +{\mathrm{H}}_2\mathrm{O}+{\mathrm{O}}_2 $$To overcome the defects of Fenton process, Fenton‐like processes have been proposed, which have attracted more increasing attention (Hashemzadeh et al., 2021; Soon & Hameed, 2011). Recently iron rich natural materials such as Fe‐based metal–organic frameworks and Fe@Fe2O3 core‐shell nano‐materials have been investigated widely and excellent performance was achieved (Bae et al., 2013; Khataee et al., 2015; Liu et http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Water Environment Research Wiley

Insights into the role of nanoscale zero‐valent iron in Fenton oxidation and its application in naphthalene degradation from water and slurry systems

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References (58)

Publisher
Wiley
Copyright
© 2022 Water Environment Federation.
ISSN
1061-4303
eISSN
1554-7531
DOI
10.1002/wer.10710
Publisher site
See Article on Publisher Site

Abstract

INTRODUCTIONAdvanced oxidation processes (AOPs) have gained considerable attention recently as alternative methods to degrade the refractory organic pollutants due to the generation of reactive oxygen species (ROS) (Ateş & Argun, 2021; Cavalcanti et al., 2021; Tao et al., 2021). Among AOPs, Fenton oxidation using hydrogen peroxide (H2O2) as the oxidant is considered one of the best options for remediation of these pollutants. Fenton oxidation can degrade extensive organic micropollutants by producing hydroxyl radical (HO•), as shown in Equations 1–3, and improve the biodegradability of organisms (McQuillan et al., 2020; Wang et al., 2014; Wang & Wang, 2020). However, iron sludge, which was formed at the end of Fenton process and was considered as second pollution, and the consumption of significant amounts of reagents, in some cases, limited the application of Fenton oxidation (Wang et al., 2014).1FeII+H2O2→FeIII+OH–+HO•$$ \mathrm{Fe}\ \left(\mathrm{II}\right)+{\mathrm{H}}_2{\mathrm{O}}_2\to \mathrm{Fe}\ \left(\mathrm{II}\mathrm{I}\right)+{\mathrm{O}\mathrm{H}}^{\hbox{--} }+\mathrm{HO}\bullet $$2H2O2+HO•→H2O+HO2•$$ {\mathrm{H}}_2{\mathrm{O}}_2+\mathrm{HO}\bullet \to {\mathrm{H}}_2\mathrm{O}+{\mathrm{H}\mathrm{O}}_2\bullet $$3HO2•+H2O2→HO•+H2O+O2$$ {\mathrm{H}\mathrm{O}}_2\bullet +{\mathrm{H}}_2{\mathrm{O}}_2\to \mathrm{HO}\bullet +{\mathrm{H}}_2\mathrm{O}+{\mathrm{O}}_2 $$To overcome the defects of Fenton process, Fenton‐like processes have been proposed, which have attracted more increasing attention (Hashemzadeh et al., 2021; Soon & Hameed, 2011). Recently iron rich natural materials such as Fe‐based metal–organic frameworks and Fe@Fe2O3 core‐shell nano‐materials have been investigated widely and excellent performance was achieved (Bae et al., 2013; Khataee et al., 2015; Liu et

Journal

Water Environment Research – Wiley

Published: Apr 1, 2022

Keywords: degradation pathway; Fenton process; nanoscale zero‐valent iron; naphthalene; remediation

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