The effect of natural iron oxide and oxalic acid on the photocatalytic degradation of isoproturon: a kinetics and analytical study

被引：12

作者：

Boucheloukh, H. ^{[1
,2
,3
]}

Remache, W. ^{[1
,2
]}

Parrino, F. ^{[3
]}

Sehili, T. ^{[1
]}

Mechakra, H. ^{[1
]}

机构：

[1] Univ Constantine1, Lab Sci & Technol Environm, Constantine 25000, Algeria

[2] Univ MedSeddikBenyahia, Fac Sci, Dept Chem, Jijel 18000, Algeria

[3] Univ Palermo, Dipartimento Ingn Chim Proc & Mat, Viale Sci, I-90128 Palermo, Sicily, Italy

来源：

PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES | 2017年 / 16卷 / 05期

关键词：

HERBICIDE ISOPROTURON; PHOTOINDUCED DEGRADATION; AQUEOUS-SOLUTION; OXALATE; PHOTODEGRADATION; OXIDATION; IDENTIFICATION; PHOTOLYSIS; COMPLEXES; NITRATES;

D O I：

10.1039/c6pp00441e

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

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.

引用

页码：759 / 765

页数：7

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