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•HþC6H12!H2þ•C6H11 k4¼3:0�107M�1s�1 (5)
•HþC6H10!•C6H11 k5¼3:0�109M�1s�1 (6)
Under such conditions, the hydrogen atomswill be reacting equally with cyclohexane and
cyclohexenewhen k4 [cyclohexane] = k5[cyclohexene] or in otherwordswe can say that only
when1%of thecyclohexanehasbeenconverted tocyclohexene.
Furthermore, competition kinetics is also employedwhenmeasuring rate constants bypulse
radiolysisusingareferencecompound.
2.1.Computationofbimolecular rate constantof•OHwithciprofloxacin
Ciprofloxacin (CIP)belongstoaclassof fluoroquinolone familyandisusedgloballyasahuman
andveterinarymedication [10]. Ithasbeenverymuchconcentrated that theeventof thesewide
range antibiotics in the water bodies may position genuine dangers to the environment and
humanwellbeingbyproducingexpansionofbacterialmedicationinactivation.Thenaturalevent
of thesefluoroquinolonesanti-infectionagents innumerousnations,similar toSwitzerland,Aus-
traliaandChinahavebeenaffirmedinrecent literature[10–13]. Ithas likewisebeenwatchedthat
most quinolone antibiotics are not completely utilized in the humanbodyand accordinglyare
dischargedandacquaintedwiththeamphibianconditionthroughwastewatersewagesbecauseof
poorexecutionofordinarywatertreatmentplants[12,14–16]bringingaboutadversativeimpacts
to sea-goingmicroorganisms and fish [17, 18]. Thus, it becomesnecessary to advice alternative
physiochemical techniquesforeffectiveremovalofthesecontaminantsanddiminishtheirecolog-
ical effects [12, 19]. For this reason, the deterioration of ciprofloxacin (CIP) inwater utilizing
ionizingradiationswasevaluatedtoexaminetherateconstantof●OHwithCIP.Thedegradation
curvesofCIPbygammairradiationatvariousabsorbeddoseshasbeenshownbyFigure1.
Forcomputationofbimolecularrateconstantof●OHwithCIPbycompetitionkinetics,phenol
was selectedas reference compound thathas secondorder rate constant of 6.6�109M�1 s�1
with •OH [20]. The sample solution of total 150 mL having CIP and reference compound
phenol together in equivalent quantitywas immersedwith oxygen gas to change over eaq �
and●Htosuperoxideradicalanionsquickly [21],whichare less responsivecomparedto●OH.
CIPþ•OH !kCIP
Products (7)
Phenolþ•OH !kphenol
Products (8)
While, thenotations, kCIP and kphenol denotes thebimolecular rate constants of ●OHwithCIP
andphenol, respectively.Keeping thecondition that thedose rate (DR)waskept constant, the
rateofdecayofCIP isdirectly related to the rateconstantand theconcentrationof●OH[21]:
So,
�dCIP½
�
dD ¼� 1
DR dCIP½
�
dt (9)
Competition Kinetics: An Experimental Approach
http://dx.doi.org/10.5772/intechopen.70483 81
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