Concurrent oxidation and reduction of pentachlorophenol by bimetallic zerovalent Pd/Fe nanoparticles in an oxic water
Journal
Journal of Hazardous Materials
Journal Volume
301
Pages
416-423
Date Issued
2016
Author(s)
Abstract
Under the oxic condition, the most effective removal of pentachlorophenol (PCP) with Pd/Fe nanoparticles (NPs) is demonstrated as compared to the anoxic condition. Concurrent oxidation and reduction of polychlorinated compounds such as PCP by zerovalent Pd/Fe were first observed. The optimal Pd content of the bimetallic NPs is only around 0.54mgg-1 Fe. Increases in both dosage of Pd/Fe NPs and temperature enhance degradation rates and efficiency. The activation energy of 29kJ/mol indicates that the degradation is a surface-mediated mechanism. The removal mechanism also includes adsorption, which explains that the dechlorination of Cl on PCP molecules at ortho and meta positions is easier than that at para position. Overall, Pd/Fe NPs can apply directly to degrade polyhalogenated compounds in water without deaeration. © 2015 Elsevier B.V.
Subjects
Activation energy; Adsorption; Dechlorination; Mineralization; Pd/Fe nanoparticles
Other Subjects
Adsorption; Chemical activation; Dechlorination; Degradation; Herbicides; Nanoparticles; Phenols; Anoxic conditions; Effective removals; Mineralization; Oxidation and reduction; Pd/Fe nanoparticles; Polychlorinated compounds; Polyhalogenated compounds; Removal mechanism; Activation energy; dissolved oxygen; iron nanoparticle; lead; pentachlorophenol; activation energy; adsorption; anoxic conditions; dechlorination; energy efficiency; iron; nanoparticle; oxidation; palladium; PCP; pollutant removal; reduction; adsorption; Article; catalysis; concentration (parameters); dechlorination; degradation; degradation kinetics; energy; mineralization; molecular mechanics; oxidation; reduction; surface property; temperature dependence; waste component removal
Type
journal article