Please use this identifier to cite or link to this item:
|Title:||Photocatalytic oxidation of paracetamol: Dominant reactants, intermediates, and reaction mechanisms|
|Authors:||Yang, L. |
|Citation:||Yang, L., Yu, L.E., Ray, M.B. (2009-01-15). Photocatalytic oxidation of paracetamol: Dominant reactants, intermediates, and reaction mechanisms. Environmental Science and Technology 43 (2) : 460-465. ScholarBank@NUS Repository. https://doi.org/10.1021/es8020099|
|Abstract:||The role of primary active species (ecb -, h vb +, .OH, HO2 ., O 2 .-, and H2O2) during photocatalytic degradation of paracetamol (acetaminophen) using TiO2 catalyst was systematically investigated. Hydroxyl radicals (.OH) are responsible for the major degradation of paracetamol with a second-order rate constant (1.7 × 109 M-1 s-1) for an .OH-paracetamol reaction. A total of 13 intermediates was identified and classified into four categories: (i) aromatic compounds, (ii) carboxylic acids, (iii) nitrogen-containing straight chain compounds, and (iv) inorganic species (ammonium and nitrate ions). Concentration profiles of identified intermediates indicate that paracetamol initially undergoes hydroxylation through .OH addition onto the aromatic ring at ortho (predominantly), meta, and para positions with respect to the -OH position of paracetamol. This initial .OH hydroxylation is followed by further oxidation generating carboxylic acids. Subsequent mineralization of smaller intermediates eventually increases ammonium and nitrate concentration in the system. © 2009 American Chemical Society.|
|Source Title:||Environmental Science and Technology|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Jul 14, 2018
WEB OF SCIENCETM
checked on Jul 4, 2018
checked on Jun 29, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.