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Synergy of ozonation and photocatalysis to mineralize low concentration 2,4-dichlorophenoxyacetic acid in aqueous solution [An article from: Chemosphere]
Synergy of ozonation and photocatalysis to mineralize low concentration 24dichlorophenoxyacetic acid in aqueous solution [An article from: Chemosphere] | ![Synergy of ozonation and photocatalysis to mineralize low concentration 2,4-dichlorophenoxyacetic acid in aqueous solution [An article from: Chemosphere]](http://ecx.images-amazon.com/images/I/51M6G4MFGFL._SL160_.jpg)
 enlarge | Authors: R.r. Giri, H. Ozaki, T. Ishida, R. Takanami, Tanig
Publisher: Elsevier
Category: Book
Buy New: $10.95
Format: Html
Media: Digital
Publication Date: January 1, 2007
Availability: Available for download now
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Product Description
This digital document is a journal article from Chemosphere, published by Elsevier in 2007. 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.BRBRSTRONGDescription:/STRONGBR Concentration of 2,4-dichlorophenoxyacetic acid (2,4-D) may affect its degradation kinetics in advanced oxidation systems, and combinations of two or more systems can be more effective for its mineralization at low concentration levels. Degradations and mineralizations of 0.045mM 2,4-D using O"3, O"3/UV, UV/TiO"2 and O"3/UV/TiO"2 systems were compared, and influence of reaction temperature on the mineralization in O"3/UV/TiO"2 system was investigated. 2,4-D degradations by O"3, O"3/UV and UV/TiO"2 systems were similar to the results of earlier investigations with higher 2,4-D concentrations. The degradations and total organic carbon (TOC) removals in the four systems were well described by the first-order reaction kinetics. The degradation and removal were greatly enhanced in O"3/UV/TiO"2 system, and further enhancements were observed with larger O"3 supplies. The enhancements were attributed to hydroxyl radical (^?OH) generation from more than one reaction pathway. The degradation and removal in O"3/UV/TiO"2 system were very efficient with reaction temperature fixed at 20^oC. It was suspected that reaction temperature might have influenced ^?OH generation in the system, which needs further attention.
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