NDLI: Oxalate-assisted oxidative degradation of 4-chlorophenol in a bimetallic, zero-valent iron

Content Provider	Springer Nature Link
Author	Fan, Jinhong Wang, Hongwu Ma, Luming
Copyright Year	2016
Abstract	The reaction of zero-valent iron and aluminum with oxygen produced reactive oxidants that can oxidize 4-chlorophenol (4-CP). However, oxidant yield without metal surface cleaning to dissolve the native oxide layer or in the absence of ligands was too low for practical applications. The addition of oxalate (ox) to dissolved oxygen-saturated solution of Fe$^{0}$–Al$^{0}$ significantly increased oxidant yield because of the dissolution, pH buffer, and complexing characteristics of ox. Ox-enhanced reactive oxidant generation was affected by ox concentration and solution pH. The critical effect of ox dosing was confirmed with the reactive species of [Fe$^{II}$(ox)$_{0}$] and [Fe$^{II}$(ox)$_{2}$ $^{2−}$]. Systematic studies on the effect of the initial and in situ solution pH revealed that 4-CP oxidation was controlled by the continuous release of dissolved Fe$^{2+}$ and Al$^{3+}$, their fate, and the activation mechanisms of O$_{2}$ reduction. The degradation pathway of 4-CP in ox-enhanced Fe$^{0}$–Al$^{0}$/O$_{2}$ may follow the 4-chlorocatechol pathway. The robustness of the ox-enhanced Al$^{0}$–Fe$^{0}$–O$_{2}$ process was determined with one-time dosing of ox. Therefore, ox is an ideal additive to enhancing the Fe$^{0}$–Al$^{0}$/O$_{2}$ system for the oxidative degradation of aqueous organic pollutants.
Starting Page	16686
Ending Page	16698
Page Count	13
File Format	PDF
ISSN	09441344
Journal	Environmental Science and Pollution Research
Volume Number	23
Issue Number	16
e-ISSN	16147499
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2016-05-16
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Fe$^{0}$–Al$^{0}$/O$_{2}$ system Oxalate Fenton-like Reactive oxygen species Environment Environmental Chemistry Ecotoxicology Environmental Health Atmospheric Protection/Air Quality Control/Air Pollution Waste Water Technology Water Pollution Control Water Management Aquatic Pollution
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Health, Toxicology and Mutagenesis Pollution Medicine

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