OPTIMIZAREA PROCESULUI DE OXIDARE CATALITICĂ A AMOXICILINEI ÎN SOLUȚII APOASE
Date
2020
Journal Title
Journal ISSN
Volume Title
Publisher
CEP USM
Abstract
În
articol
sunt
prezentat
e
rezultatele investigației
proceselor
de oxidare a
amoxicilinei cu reagentul Fenton în mediul
acid.
R
eziduuri
le medicamentoase sunt nebiodegradabile
;
astfel
,
u
na din
tre
metodele de tratare a apelor reziduale este
oxidarea catalitică
.
Obiectivul
principal al acestei cercetări rezidă
în
optimizarea parametrilor
fizico
-
chimici
ce inf
luen
-
ț
ează procesul de oxidare a
am
oxicilinei (
AMX
)
. Au fost realizate mai multe studii experimentale pentru
a determina
efectul degradării/
mineralizării și concentrațiile optime de H
2
O
2
și
de
catalizator
(
reagentul Fenton)
. Concentrațiile inițiale
ale substanțelor reactante au fost variate în intervalul: 0
.
01
–
0
.
3 mM pentru Fe (II) și 1
–
5 mM pentru H
2
O
2
.
Oxidarea
catalitică a AMX s
-
a realizat la valaorea p
H
-
ul
ui
care
a fost ajustat
ă
la valoarea 2,2
.
În
rezultatul cercetărilor
de laborator
s
-
a constatat că raportul
optim
dintre Fe
2+
: H
2
O
2
: AMX este de 1:10:2. S
-
a ajuns
la concluzia că efectul de răspuns al fiecărei variabile independente depinde de valoarea celeilalte, datorită existenței
interacțiunilor
simultane
. Astfel, oricare dintre parametrii studiați ar putea influența pozitiv sau negativ degradarea amoxi
-
cilinei.
În rezultatul
procesului de
optimizare
a
parametrilor fizico
–
chimici,
la oxidarea catalitică a AMX
s
-
a obținut că rata
maximă
de minerali
zare/ oxidare a amoxi
cilinei a fost de 96
%, iar rata de degradare a AMX
–
de
90%.
This paper describes a study of catalytic oxidation of AMX by Fenton process in aqueous solution. These chemicals are not biodegrading and under such conditions and chemical oxidation could be a very effective alternative treatment . The primary objective o f this research was to optimize the parameters that influence the oxidation process of AMX and to evaluate the degradation of AMX by Fenton reagent. Several experimental studies have been performed in order to determine the degradation/mineralization effec t and optimal concentrations of oxidant and catalyst. The initial concentra - tions of the reactants ranged from 0 . 01 to 0 . 3 mM for Fe (II) and 1 to 5 mM for H 2 O 2 . The pH value was adjusted to 2.2 using 0.1 N H 2 SO 4 . As a result of laboratory research, it was found that the optimal ratio of Fe 2+ : H 2 O 2 : AMX is 1: 10: 2. It was concluded that the response effect of each independent variable depends on the value of the other, due to the existence of cross - interactions. Thus, any of the psysico - chemical parameters studied could positively or negatively influence the degrada - tion of amoxicillin. As a result of the optimization process of the physic o - chemical parameters, it was obtained that the maximum mineralization/ oxidation rate of amoxicillin has been 96%, and the degradation rate of AMX – 90%
This paper describes a study of catalytic oxidation of AMX by Fenton process in aqueous solution. These chemicals are not biodegrading and under such conditions and chemical oxidation could be a very effective alternative treatment . The primary objective o f this research was to optimize the parameters that influence the oxidation process of AMX and to evaluate the degradation of AMX by Fenton reagent. Several experimental studies have been performed in order to determine the degradation/mineralization effec t and optimal concentrations of oxidant and catalyst. The initial concentra - tions of the reactants ranged from 0 . 01 to 0 . 3 mM for Fe (II) and 1 to 5 mM for H 2 O 2 . The pH value was adjusted to 2.2 using 0.1 N H 2 SO 4 . As a result of laboratory research, it was found that the optimal ratio of Fe 2+ : H 2 O 2 : AMX is 1: 10: 2. It was concluded that the response effect of each independent variable depends on the value of the other, due to the existence of cross - interactions. Thus, any of the psysico - chemical parameters studied could positively or negatively influence the degrada - tion of amoxicillin. As a result of the optimization process of the physic o - chemical parameters, it was obtained that the maximum mineralization/ oxidation rate of amoxicillin has been 96%, and the degradation rate of AMX – 90%
Description
Keywords
amoxicilină, oxidare catalitică, reagent Fenton, sisteme model, amoxicillin, catalytic oxidation, synthetic system
Citation
MOCANU, Larisa, GONȚA, Maria, MATVEEVICI, Vera. Optimizarea procesului de oxidare catalitică a amoxicilinei în soluții apoase. In: Studia Universitatis Moldaviae. Seria Științe reale și ale naturii: Biologie. Chimie. Revista științifică. 2020, nr. 1(131), pp. 38 - 47. ISSN 1814-3237