1,4-Dioxane degradation by oxidation and sonication in the presence of different-sized ZVI in open-air system

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We investigated the effect of particle size during oxidation and the sono-Fenton process in an open-air system (without air supply) containing microscale zero-valent iron (MZVI) and nanoscale zero-valent iron (nZVI) on the degradation of 1,4-dioxane (1,4-D) at neutral pH. Time-dependent concentrations of 1,4-D, H2O2, and ionic Fe were measured as a function of MZVI and nZVI loading during oxidation and sono-Fenton (without addition of H2O2). The optimal loading of MZVI and nZVI for 1,4-D degradation were determined to be 0.5 g/L during both oxidation and sono-Fenton, and 0.2 and 0.1 g/L during both oxidation and sono-Fenton, respectively. Overall, the optimal loading of MZVI in both the oxidation and sono-Fenton system showed better 1,4-D degradation efficiency compared with the optimal loading of nZVI for 6 h: approximately 60.00 and 76.65% removal efficiencies for MZVI oxidation and sono-Fenton, respectively, while approximately 47.13 and 60.98% removal efficiencies for nZVI oxidation and sono-Fenton, respectively. Consequently, the smaller size of ZVI did not enhance 1,4-D degradation efficiency during the oxidation and sono-Fenton at neutral pH.
Publisher
TAYLOR FRANCIS INC
Issue Date
2012-12
Language
English
Article Type
Article
Keywords

ZERO-VALENT IRON; CORE-SHELL NANOWIRES; HYDROGEN-PEROXIDE; ORGANIC-COMPOUNDS; FENTON OXIDATION; AQUEOUS-SOLUTION; ZEROVALENT IRON; ELEMENTAL IRON; HUMIC-ACID; KINETICS

Citation

DESALINATION AND WATER TREATMENT, v.50, no.1-3, pp.102 - 114

ISSN
1944-3994
DOI
10.1080/19443994.2012.708554
URI
http://hdl.handle.net/10203/103408
Appears in Collection
CBE-Journal Papers(저널논문)
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