Photocatalytic treatment of water-soluble pesticides by photo-Fenton and TiO2 using solar energy

被引:264
作者
Malato, S
Blanco, J
Cáceres, J
Fernández-Alba, AR
Agüera, A
Rodríguez, A
机构
[1] CIEMAT, Plataforma Solar Almeria, Tabernas 04200, Almeria, Spain
[2] Univ Almeria, Pesticide Residue Res Grp, Almeria 04071, Spain
[3] Univ Alcala de Henares, Dept Chem Engn, Alcala De Henares, Spain
关键词
Diuron; imidacloprid; formetanate; methomyl; pesticides; photocatalysis; photo-fenton; titanium dioxide;
D O I
10.1016/S0920-5861(02)00220-1
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
The technical feasibility and performance of photocatalytic degradation of four water-soluble pesticides (diuron, imidacloprid, formetanate and methomyl) have been studied at pilot scale in two well-defined systems of special interest because natural-solar UV light can be used: heterogeneous photocatalysis with titanium dioxide and homogeneous photocatalysis by photo-Fenton. The pilot plant is made up of compound parabolic collectors (CPCs) specially designed for solar photocatalytic applications. Experimental conditions allowed disappearance of pesticide and degree of mineralisation achieved in the two photocatalytic systems to be compared. In order to assure that the photocatalytic results are consistent, hydrolysis and photolysis tests have been performed with the four pesticides. The initial concentration tested with imidacloprid, formetanate and methomyl was 50 and 30 mg/l with diuron, and the catalyst concentrations were 200 mg/l and 0.05 mM with TiO2 and iron, respectively. Total disappearance of the parent compounds and 90% mineralisation have been attained with all pesticides tested, methomyl being the most difficult to be degraded with both treatments. First-order rate constants, initial rate, time necessary for mineralising 90% of the initial TOC and hydrogen peroxide consumption were calculated in all cases, enabling comparison both of treatments and of the selected pesticide reactivity. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:209 / 220
页数:12
相关论文
共 39 条
  • [1] Evaluation of photocatalytic degradation of imidacloprid in industrial water by GC-MS and LC-MS
    Aguera, A
    Almansa, E
    Malato, S
    Maldonado, MI
    Fernandez-Alba, AR
    [J]. ANALUSIS, 1998, 26 (07) : 245 - 251
  • [2] Photocatalysis in water environments using artificial and solar light
    Alfano, OM
    Bahnemann, D
    Cassano, AE
    Dillert, R
    Goslich, R
    [J]. CATALYSIS TODAY, 2000, 58 (2-3) : 199 - 230
  • [3] Advanced oxidation processes (AOP) for water purification and recovery
    Andreozzi, R
    Caprio, V
    Insola, A
    Marotta, R
    [J]. CATALYSIS TODAY, 1999, 53 (01) : 51 - 59
  • [4] The status of wastewater reuse practice in the Mediterranean basin: Need for guidelines
    Angelakis, AN
    Do Monte, MHFM
    Bontoux, L
    Asano, T
    [J]. WATER RESEARCH, 1999, 33 (10) : 2201 - 2217
  • [5] [Anonymous], EUROPEAN ENV AGENCY
  • [6] Blake D. M., 2001, BIBLIO WORK PHOTOCAT
  • [7] Compound parabolic concentrator technology development to commercial solar detoxification applications
    Blanco, J
    Malato, S
    Fernández, P
    Vidal, A
    Morales, A
    Trincado, P
    Oliveira, JC
    Minero, C
    Musci, M
    Casalle, C
    Brunotte, M
    Tratzky, S
    Dischinger, N
    Funken, KH
    Sattler, C
    Vincent, M
    Collares-Pereira, M
    Mendes, JF
    Rangel, CM
    [J]. SOLAR ENERGY, 1999, 67 (4-6) : 317 - 330
  • [8] Blanco J., 2001, SOLAR DETOXIFICATION, P1996
  • [9] BLANCO J, 1999, Patent No. 9902508
  • [10] Photocatalytic degradation of ammonia with TiO2 as photocatalyst in the laboratory and under the use of solar radiation
    Bonsen, EM
    Schroeter, S
    Jacobs, H
    Broekaert, JAC
    [J]. CHEMOSPHERE, 1997, 35 (07) : 1431 - 1445