Photocatalytic oxidation of the herbicide (4-chloro-2-methylphenoxy)acetic acid (MCPA) over TiO2

被引：80
|
作者：
Topalov, A [1 ]
Abramovic, B [1 ]
Molnár-Gábor, D [1 ]
Csanádi, J [1 ]
Arcson, O [1 ]
机构：
[1] Univ Novi Sad, Fac Sci, Inst Chem, YU-21000 Novi Sad, Yugoslavia
来源：
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2001年 / 140卷 / 03期
关键词：
photocatalytic oxidation; herbicide MCPA; titanium(IV) oxide;
D O I：
10.1016/S1010-6030(01)00415-4
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The photocatalytic decomposition of the herbicide (4-chloro-2-methylphenoxy)acetic acid (MCPA), C9H9ClO3 in aqueous suspensions containing TiO2 was investigated by following the formation of intermediates via recording proton NMR spectra. One of theoretically possible intermediates, 4-chloro-2-methylphenolmethanoate, was synthesized by a modified esterification procedure. Based on the data obtained a possible reaction mechanism was proposed. The rate of MCPA aromatic ring decomposition was followed by pH changes during illumination. As a result, apparent reaction rate constant was found to be 7.0 x 10(-6) mol dm(-3) min(-1). The complete mineralization was attained after about 15 h of illumination. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：249 / 253
页数：5
相关论文
共 50 条
  • [1] Phototransformation of 4-chloro-2-methylphenoxy acetic acid (MCPA)
    Zertal, A.
    Sehili, T.
    Boule, P.
    Zeitschrift fur Physikalische Chemie, 1999, 213 (01): : 87 - 92
  • [2] Phototransformation of 4-chloro-2-methylphenoxy acetic acid (MCPA)
    Zertal, A
    Sehili, T
    Boule, P
    ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS, 1999, 213 : 87 - 92
  • [3] Photosensitized transformation of the herbicide 4-chloro-2-methylphenoxy acetic acid (MCPA) in water
    Stangroom, SJ
    Macleod, CL
    Lester, JN
    WATER RESEARCH, 1998, 32 (03) : 623 - 632
  • [4] Surfactant toxicity in a case of (4-chloro-2-methylphenoxy) acetic acid herbicide intoxication
    Hwang, I.
    Lee, J. W.
    Kim, J. S.
    Gil, H. W.
    Song, H. Y.
    Hong, S. Y.
    HUMAN & EXPERIMENTAL TOXICOLOGY, 2015, 34 (08) : 848 - 855
  • [5] COMPOSITION AND PHOTOCHEMICAL-REACTIONS OF A DIMETHYLAMINE SALT FORMULATION OF (4-CHLORO-2-METHYLPHENOXY)ACETIC ACID (MCPA)
    CROSBY, DG
    BOWERS, JB
    JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, 1985, 33 (04) : 569 - 573
  • [6] Effects of dissolved gas species on ultrasonic degradation of (4-chloro-2-methylphenoxy) acetic acid (MCPA) in aqueous solution
    Kojima, Y
    Fujita, T
    Ona, EP
    Matsuda, H
    Koda, S
    Tanahashi, N
    Asakura, Y
    ULTRASONICS SONOCHEMISTRY, 2005, 12 (05) : 359 - 365
  • [7] Nitrogen-doped TiO2 suspensions in photocatalytic degradation of mecoprop and (4-chloro-2-methylphenoxy)acetic acid herbicides using various light sources
    Abramovic, Bijana F.
    Sojic, Daniela V.
    Anderluh, Vesna B.
    Abazovic, Nadica D.
    Comor, Mirjana I.
    DESALINATION, 2009, 244 (1-3) : 293 - 302
  • [8] Enhanced decomposition of (4-chloro-2-methylphenoxy) acetic acid by combined ultrasonic and oxidative treatment
    Mitsuhiro Kubota
    Masahiro Hayashi
    Hitoki Matsuda
    Hirokazu Serizawa
    Journal of Material Cycles and Waste Management, 2012, 14 : 132 - 138
  • [9] (+/-)-2-(4-CHLORO-2-METHYLPHENOXY)PROPIONIC ACID (MECOPROP)
    SMITH, G
    KENNARD, CHL
    WHITE, AH
    HODGSON, PG
    ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE CRYSTAL ENGINEERING AND MATERIALS, 1980, 36 (APR) : 992 - 994
  • [10] Enhanced decomposition of (4-chloro-2-methylphenoxy) acetic acid by combined ultrasonic and oxidative treatment
    Kubota, Mitsuhiro
    Hayashi, Masahiro
    Matsuda, Hitoki
    Serizawa, Hirokazu
    JOURNAL OF MATERIAL CYCLES AND WASTE MANAGEMENT, 2012, 14 (02) : 132 - 138
12345