Seite - 86 - in Advanced Chemical Kinetics
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ofH2O2wasexposed toUVirradiation,while another set of experimentswas freeofH2O2 to
calculate kUV. The concentration ofH2O2waskept higher for ensuringproductionof efficient
•OHwithUV-photocatalysis.
Figure 2 showsdegradation curves for BZF and p-CBA, bothBZFand p-CBAwere found to
follow pseudo-first order degradation kinetics. The second order rate constant of •OHwith
p-CBAis5.0 109M 1s 1 [20].Bysubstitutingpseudo-firstorderdegradationconstants(kUV=H2O2
and kUV) values in Eq. (15), the bimolecular rate constant of •OHwith BZFwas calculated and
foundout tobe5.66 109M 1s 1.
3.Conclusions
Theoverall conclusionof this chapter is that, in radiation chemistry tohaveagoodknowledge
about the mechanism of a reactionmechanism it is necessary that one must have sufficient
understanding about the free radical kinetics. In addition, competition kineticsmodel can be
successfulappliedforthedeterminationofunknownrateconstantsofreactivespecieswithsolute
molecule.Thecompetitionkineticscannotonlybeappliedfor●OHrateconstantswiththesolute
butalsoformeasurementofeaq and●Hwiththetargetspecies.Thecompetitionkineticsmethod
isvalidatedby takingciprofloxacin,norfloxacinandbezafibrateas example compounds.How-
ever, itshouldbemakesurethatcompetingreactionsdonotdisobeythekineticsrules.
Authordetails
MurtazaSayed1*,LuqmanAliShah1, JavedAliKhan1,NoorS.Shah1,2,RozinaKhattak3and
HasanM.Khan1
*Addressall correspondence to:murtazasayed_407@yahoo.com
1 RadiationandEnvironmentalChemistryLaboratory,NationalCentreofExcellence in
PhysicalChemistry,UniversityofPeshawar,Pakistan
2 DepartmentofEnvironmentalSciences,COMSATSInstituteof InformationTechnology,
Vehari,Pakistan
3 DepartmentofChemistry,ShaheedBenazirBhuttoWomenUniversity,Peshawar,Pakistan
References
[1] Spinks JWT,Woods RJ. An Introduction to RadiationChemistry. John-Wiley and Sons,
Inc.,NewYork;1990.
[2] FrickeH,HartEJ.Chemicaldosimetry. In:RadiationDosimetry2.AcademicPress,New
York;1966.pp.167-239
Advanced Chemical
Kinetics86
zurück zum
Buch Advanced Chemical Kinetics"
Advanced Chemical Kinetics
- Titel
- Advanced Chemical Kinetics
- Autor
- Muhammad Akhyar Farrukh
- Herausgeber
- InTech
- Ort
- Rijeka
- Datum
- 2018
- Sprache
- englisch
- Lizenz
- CC BY 4.0
- ISBN
- 978-953-51-3816-7
- Abmessungen
- 18.0 x 26.0 cm
- Seiten
- 226
- Schlagwörter
- Engineering and Technology, Chemistry, Physical Chemistry, Chemical Kinetics
- Kategorien
- Naturwissenschaften Chemie