Radiolytic degradation of 2,4-dichlorophenoxyacetic acid in dilute aqueous solution: pH dependence

Homlok, R.; Takács, E.; Wojnárovits, L.
May 2010
Journal of Radioanalytical & Nuclear Chemistry;May2010, Vol. 284 Issue 2, p415
Academic Journal
The reactions of hydroxyl radical and hydrated electron intermediates of water radiolysis were studied in the radiolytic degradation of 2,4-dichlorophenoxyacetic acid (2,4-D) at pH values of 4, 6 and 8. The hydrated electron reactions are also suggested to contribute to the aromatic ring decomposition in addition to the highly effective hydroxyl radical reactions. The experimental results suggest also some contribution from the O/HO pair to the degradation. The degradation efficiency was found to be the highest at pH 8 and the lowest at pH 6.


Related Articles

  • Reduction and aggregation of silver ions in tert-butanol. Sarkar, A.; Kapoor, S.; Mukherjee, T. // Research on Chemical Intermediates;2005, Vol. 31 Issue 9, p845 

    Silver ions undergo reduction reactions induced by radiolytically produced products of tert-butanol, a commonly used solvent and scavenger for hydroxyl radicals. Radiolytic reduction of silver ions and the subsequent formation of their clusters are compared with the corresponding processes in...

  • Understanding OH Yields in Electron Beam Irradiation of Humid N. Schmitt, Karen; Dibble, Theodore // Plasma Chemistry & Plasma Processing;Feb2011, Vol. 31 Issue 1, p41 

    Recent experimental work by Hakoda et al. attempted to determine the G-value of OH radical in electron-beam irradiation of humid N using the conversion of CO to CO to titrate OH. Kinetic modeling is used to simulate the experiment of Hakoda et al. in an attempt to determine the validity of their...

  • The vibrational predissociation spectra of the H5O2+·RGn(RG=Ar,Ne) clusters: Correlation of the solvent perturbations in the free OH and shared proton transitions of the Zundel ion. Hammer, Nathan I.; Diken, Eric G.; Roscioli, Joseph R.; Johnson, Mark A.; Myshakin, Evgeniy M.; Jordan, Kenneth D.; McCoy, Anne B.; Xinchuan Huang; Bowman, Joel M.; Carter, Stuart // Journal of Chemical Physics;6/22/2005, Vol. 122 Issue 24, p244301 

    Predissociation spectra of the H5O2+·RGn(RG=Ar,Ne) cluster ions are reported in energy regions corresponding to both the OH stretching (3350–3850 cm-1) and shared proton (850–1950 cm-1) vibrations. The two free OH stretching bands displayed by the Ne complex are quite close to...

  • Sugars synthesized in a snap. Wang, Peng George // Nature Chemical Biology; 

    The article discusses the one-pot glycosylation method, a technology for the synthesis of orthogonally protected monosaccharide units. The technology was developed to easily access complex oligosaccharides. It distinguishes the reactivity of all non-anomeric hydroxyls on glucose by producing...

  • Communication: Real time observation of unimolecular decay of Criegee intermediates to OH radical products. Yi Fang; Fang Liu; Barber, Victoria P.; Klippenstein, Stephen J.; McCoy, Anne B.; Lester, Marsha I. // Journal of Chemical Physics;2016, Vol. 144 Issue 6, p1 

    In the atmosphere, a dominant loss process for carbonyl oxide intermediates produced from alkene ozonolysis is also an important source of hydroxyl radicals. The rate of appearance of OH radicals is revealed through direct time-domain measurements following vibrational activation of prototypical...

  • Evolutions of microbial degradation pathways for parent xenobiotic and for its metabolites follow different schemes. Chong, Nyuk-Min; Chang, Chun-Shuo; Tsai, Shiu-Ching // Environmental Science & Pollution Research;Sep2012, Vol. 19 Issue 8, p3276 

    Background and purposes: The pathways used by microorganisms for the metabolism of every xenobiotic substrate are specific. The catabolism of a xenobiotic goes through a series of intermediate steps and lower intermediates (metabolites) appear in sequence. The structure of the metabolites can be...

  • The removal of chlorinated organic herbicide in water by gamma-irradiation. Şolpan, Dilek; Torun, Murat // Journal of Radioanalytical & Nuclear Chemistry;Jul2012, Vol. 293 Issue 1, p21 

    In this study, the radiation-induced degradation of 2,4-dichlorophenoxyacetic acid (2,4-D) herbicide in aqueous solution was studied under various conditions as a function of irradiation dose in the absence and presence of hydrogen peroxide. The obtained data confirmed that largest yield of...

  • Détection des radicaux OH et O[sup –] [sub 2] issus de la radiolyse de l'eau par chimiluminescence résolue en temps. Wasselin-Trupin, V; Baldacchino, G; Hickel, B // Canadian Journal of Physiology & Pharmacology;Feb2001, Vol. 79 Issue 2, p171 

    A new method for the detection of low concentrations of hydroxyl and superoxide radicals, formed by water radiolysis, is described in this article. The method used is the time resolved chemiluminescence. It has been performed with an electron beam delivered by a Febetron 707 accelerator. This...

  • Effect of ascorbic acid and its derivatives on the radiation-chemical transformations of hydroxyl-containing organic compounds. Brinkevich, S. D.; Shadyro, O. I. // High Energy Chemistry;Jul2008, Vol. 42 Issue 4, p255 

    The effect of ascorbic acid, 5,6- O-isopropylidyl-2,3- O-dimethylascorbic acid, and 2- O-glucopyranosylascorbic acid on the formation of main radiolysis products of ethanol and aqueous ethanol, ethylene glycol, α-methylglucopyranoside, and maltose solutions was studied by means of continuous...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics