Kinetics of catalytic ozonation of oxalic acid in water with activated carbon

被引:131
作者
Beltrán, FJ [1 ]
Rivas, FJ
Fernández, LA
Alvarez, PM
Montero-de-Espinosa, R
机构
[1] Univ Extremadura, Dept Ingn Quim & Energet, E-06071 Badajoz, Spain
[2] Ctr Nacl Invest Cient, Ctr Invest Ozono, Havana, Cuba
关键词
D O I
10.1021/ie020311d
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
The ozonation kinetics of oxalic acid in water in the presence of an activated carbon has been investigated at acid pH. The presence of the activated carbon significantly enhances the degradation rate of oxalic acid if compared to single ozonation and single adsorption. According to total organic carbon measurements, nearly complete mineralization of oxalic acid can be achieved depending on the experimental conditions. The presence of tert-butyl alcohol, which scarcely adsorbs on the carbon surface at the conditions investigated, led to a significant reduction of the oxalic acid removal rate. Consequently, experimental results suggest that the reaction proceeds in the water phase between oxalic acid and oxidant species, likely hydroxyl radicals, coming from the ozone decomposition on the carbon surface. The proposed mechanism yielded a first-order kinetics with respect to ozone, close to the 0.8 order experimentally observed. Also, the energy of activation was found to be approximately 15 kcal mol(-1).
引用
收藏
页码:6510 / 6517
页数:8
相关论文
共 23 条
  • [1] DETERMINATION OF OZONE IN WATER BY THE INDIGO METHOD
    BADER, H
    HOIGNE, J
    [J]. WATER RESEARCH, 1981, 15 (04) : 449 - 456
  • [2] Determination of kinetic parameters of ozone during oxidations of alachlor in water
    Beltrán, FJ
    González, M
    Rivas, FJ
    Acedo, B
    [J]. WATER ENVIRONMENT RESEARCH, 2000, 72 (06) : 689 - 697
  • [3] BELTRAN FJ, 2001, P 15 OZ WORLD C LOND, V1, P28
  • [4] OXIDATION OF ORGANIC-COMPOUNDS THROUGH THE COMBINATION OZONE-HYDROGEN PEROXIDE
    BRUNET, R
    BOURBIGOT, MM
    DORE, M
    [J]. OZONE-SCIENCE & ENGINEERING, 1984, 6 (03) : 163 - 183
  • [5] Infrared study of ozone adsorption on CeO2
    Bulanin, KM
    Lavalley, JC
    Lamotte, J
    Mariey, L
    Tsyganenko, NM
    Tsyganenko, AA
    [J]. JOURNAL OF PHYSICAL CHEMISTRY B, 1998, 102 (35): : 6809 - 6816
  • [6] CRITICAL-REVIEW OF RATE CONSTANTS FOR REACTIONS OF HYDRATED ELECTRONS, HYDROGEN-ATOMS AND HYDROXYL RADICALS (.OH/.O-) IN AQUEOUS-SOLUTION
    BUXTON, GV
    GREENSTOCK, CL
    HELMAN, WP
    ROSS, AB
    [J]. JOURNAL OF PHYSICAL AND CHEMICAL REFERENCE DATA, 1988, 17 (02) : 513 - 886
  • [7] The use of ozone and associated oxidation processes in drinking water treatment
    Camel, V
    Bermond, A
    [J]. WATER RESEARCH, 1998, 32 (11) : 3208 - 3222
  • [8] An investigation of catalytic ozonation for the oxidation of halocarbons in drinking water preparation
    Cooper, C
    Burch, R
    [J]. WATER RESEARCH, 1999, 33 (18) : 3695 - 3700
  • [9] Gas phase ozone decomposition catalysts
    Dhandapani, B
    Oyama, ST
    [J]. APPLIED CATALYSIS B-ENVIRONMENTAL, 1997, 11 (02) : 129 - 166
  • [10] Fogler H.S., 1999, ELEMENTS CHEM REACTI