- The effect of natural iron oxide and oxalic acid on the photocatalytic degradation of isoproturon: A kinetics and analytical study
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The photocatalytic degradation of isoproturon, a persistent toxic herbicide, was investigated in the presence of natural iron oxide and oxalic acid and under UV irradiation. The influence of the relevant parameters such as the pH and the iron oxide and oxalic acid concentrations has been studied. The presence of natural iron oxide and oxalic acid in the system effectively allow the degradation of isoproturon, whereas the presence of t-butyl alcohol adversely affects the phototransformation of the target pollutant, thus indicating that an OH radical initiated the degradation mechanism. The degradation mechanism of isoproturon was investigated by means of GC-MS analysis. Oxidation of both the terminal N-(CH3)2 and isopropyl groups is the initial process leading to N-monodemethylated (NHCH3), N-formyl (N(CH3)CHO), and CHCH3OH as the main intermediates. The substitution of the isopropyl group by an OH group is also observed as a side process.
- Boucheloukh,Remache,Parrino,Sehili,Mechakra
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- Kinetic and analytical study of the photo-induced degradation of monuron by nitrates and nitrites under irradiation or in the dark
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The photo-induced transformation of monuron (3-(4-chlorophenyl)-1,1 dimethylurea) was investigated in an aqueous solution containing nitrates and nitrites at 310 nm and 365 nm, respectively. In both NO3- and NO2-/sup
- Boucheloukh, Hadjira,Sehili, Tahar,Kouachi, Nadia,Djebbar, Kamel
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experimental part
p. 1339 - 1345
(2012/09/25)
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- Anti-coccidal agents 1-[4-(benzothia- or -oxazol-2-ylthio- or -2-yloxy)phenyl]-1,3,5-triazine-2,4,6-(1H,3H,5H)-trione derivatives, compositions, and method of use thereof
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1-[4-(Benzothia- or -oxazol-2-ylthio- or -2-yloxy)phenyl]-1,3,5-triazine-2,4,6(1H,3H,5H)-triones of the formula STR1 in which R is lower alkyl, R1 and R2 each independently is hydrogen, halogen, alkyl or alkoxy, R3 and Rs
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- 1-Methoxy-1-methyl-3-{p-[(1,1-dimethyl-2-propynyloxy)-methoxy]phenyl}urea
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This invention relates to novel (alkenyloxy), (alkynyloxy) and (cyanoalkoxy) alkoxyphenyl ureas and their use as herbicidal agents.
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