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Mechanism of the enhanced degradation of pentachlorophenol by ultrasound in the presence of elemental iron [An article from: Journal of Hazardous Materials]

Mechanism of the enhanced degradation of pentachlorophenol by ultrasound in the presence of elemental iron [An article from: Journal of Hazardous Materials]

F. Li
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This digital document is a journal article from Journal of Hazardous Materials, published by Elsevier in 2006. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.


Ultrasound combined with elemental iron is effective in oxidizing organic contaminants in water. The sonolysis degradation of pentachlorophenol was significantly enhanced by a factor of 4.2 with the addition of elemental iron, mainly via reaction with hydroxyl radicals , and the synergistic mechanism of the enhancement in the combined system was investigated. Experiments were performed with sole ultrasonic treatment; ultrasound in presence of iron; ultrasound combined with copper powder as the same particle size as iron powder; ultrasound in presence of Fe. It was observed that PCP degradation and ?OH radicals production were both enhanced in these combined methods, and the pitting on the sonicated iron surface was apparent. These results indicated that the rate enhancements in US/Fe^0 system were attributed to the iron solid effect and the catalysis of Fe produced from corroded-iron with promoting the production of ?OH radicals; the increased surface area of iron particles by acoustic cavitation with promoting the adsorption process.
Language
English
Pages
5
Format
ebook
Release
October 11, 2006

Mechanism of the enhanced degradation of pentachlorophenol by ultrasound in the presence of elemental iron [An article from: Journal of Hazardous Materials]

F. Li
0/5 ( ratings)
Read Download
This digital document is a journal article from Journal of Hazardous Materials, published by Elsevier in 2006. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.


Ultrasound combined with elemental iron is effective in oxidizing organic contaminants in water. The sonolysis degradation of pentachlorophenol was significantly enhanced by a factor of 4.2 with the addition of elemental iron, mainly via reaction with hydroxyl radicals , and the synergistic mechanism of the enhancement in the combined system was investigated. Experiments were performed with sole ultrasonic treatment; ultrasound in presence of iron; ultrasound combined with copper powder as the same particle size as iron powder; ultrasound in presence of Fe. It was observed that PCP degradation and ?OH radicals production were both enhanced in these combined methods, and the pitting on the sonicated iron surface was apparent. These results indicated that the rate enhancements in US/Fe^0 system were attributed to the iron solid effect and the catalysis of Fe produced from corroded-iron with promoting the production of ?OH radicals; the increased surface area of iron particles by acoustic cavitation with promoting the adsorption process.
Language
English
Pages
5
Format
ebook
Release
October 11, 2006

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