Determination of kinetic parameters of ozone during oxidations of alachlor in water

被引:13
作者
Beltrán, FJ [1 ]
González, M
Rivas, FJ
Acedo, B
机构
[1] Univ Extremadura, Dept Ingn Quim & Energet, E-06071 Badajoz, Spain
[2] Univ Poitiers, Lab Chim Eau & Environm, Poitiers, France
关键词
alachlor; water ozonation; ozonation kinetics; UV-ozone oxidation; UV-hydrogen peroxide oxidation;
D O I
10.2175/106143000X138300
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
A study of the ozonation of the herbicide alachlor in distilled and surface water was performed. The influence of variables, including pH, water type, and free-radical-inhibiting substances, on the removal rate of alachlor was investigated. Alachlor was primarily removed from water through hydroxyl radical oxidation because low pH and the presence of natural substances such as carbonates significantly reduced the alachlor removal rate, Hydrogen peroxide was formed in low concentration during ozonation. Rate constants of the reactions between alachlor and ozone and between alachlor and the hydroxyl radicals were found to be 2.8 and 3.2 x 10(10) L/mol.s, respectively. Because combined UV radiation and ozonation constitute one of the possible ozonation processes to treat alachlor, the quantum yield of this herbicide was determined and found to be 0.177 mol/einstein, which is a significant value compared to others found for different herbicides.
引用
收藏
页码:689 / 697
页数:9
相关论文
共 40 条
[1]   Identification of a new sulfenic acid metabolite of metolachlor in soil [J].
Aga, DS ;
Thurman, EM ;
Yockel, ME ;
Zimmerman, LR ;
Williams, TD .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1996, 30 (02) :592-597
[2]  
[Anonymous], 1 3 DIPOLAR CYCLOADD
[3]   DETERMINATION OF OZONE IN WATER BY THE INDIGO METHOD [J].
BADER, H ;
HOIGNE, J .
WATER RESEARCH, 1981, 15 (04) :449-456
[4]   THE REACTIONS OF OZONE WITH ORGANIC COMPOUNDS [J].
BAILEY, PS .
CHEMICAL REVIEWS, 1958, 58 (05) :925-1010
[5]   ADVANCED OXIDATION OF ATRAZINE IN WATER .2. OZONATION COMBINED WITH ULTRAVIOLET-RADIATION [J].
BELTRAN, FJ ;
GARCIAARAYA, JF ;
ACEDO, B .
WATER RESEARCH, 1994, 28 (10) :2165-2174
[6]   ADVANCED OXIDATION OF ATRAZINE IN WATER .1. OZONATION [J].
BELTRAN, FJ ;
GARCIAARAYA, JF ;
ACEDO, B .
WATER RESEARCH, 1994, 28 (10) :2153-2164
[7]   OXIDATION OF ATRAZINE IN WATER BY ULTRAVIOLET-RADIATION COMBINED WITH HYDROGEN-PEROXIDE [J].
BELTRAN, FJ ;
OVEJERO, G ;
ACEDO, B .
WATER RESEARCH, 1993, 27 (06) :1013-1021
[8]   OXIDATION OF POLYNUCLEAR AROMATIC-HYDROCARBONS IN WATER .2. UV-RADIATION AND OZONATION IN THE PRESENCE OF UV-RADIATION [J].
BELTRAN, FJ ;
OVEJERO, G ;
GARCIAARAYA, JF ;
RIVAS, J .
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1995, 34 (05) :1607-1615
[9]   APPLICATION OF PHOTOCHEMICAL REACTOR MODELS TO UV IRRADIATION OF TRICHLOROETHYLENE IN WATER [J].
BELTRAN, FJ ;
GONZALEZ, M ;
RIVAS, FJ ;
JARAMILLO, J .
CHEMOSPHERE, 1995, 31 (03) :2873-2885
[10]   DIRECT, RADICAL AND COMPETITIVE REACTIONS IN THE OZONATION OF WATER MICROPOLLUTANTS [J].
BELTRAN, FJ ;
RIVAS, FJ ;
ACEDO, B .
JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-ENVIRONMENTAL SCIENCE AND ENGINEERING & TOXIC AND HAZARDOUS SUBSTANCE CONTROL, 1993, 28 (09) :1947-1976