TY - JOUR
T1 - Removal of organic contaminants in paper pulp treatment effluents by TiO2 photocatalyzed oxidation
AU - Pérez, Montserrat
AU - Torrades, Francesc
AU - García-Hortal, José A.
AU - Domènech, Xavier
AU - Peral, José
PY - 1997/9/30
Y1 - 1997/9/30
N2 - TiO2 slurries under UV light irradiation were used for the oxidation and removal of the organic load of effluent from the bleaching of paper pulp. TOC was the main analytical parameter used to characterize the reaction progress, although COD, AOX and color also received periodic attention. Conditions such as the catalyst load, light intensity, pH, temperature, and concentration of O2 and organic matter were changed through several series of experiments in order to determine their effect. A zero order kinetics accounts for the observed variation of TOC with time during most of the reaction, the rate constant being 0.25-0.40 ppm min-1 at 25 °C. This behavior is explained in terms of a Langmuir-Hinshelwood rate equation in a highly substrate concentrated system.
AB - TiO2 slurries under UV light irradiation were used for the oxidation and removal of the organic load of effluent from the bleaching of paper pulp. TOC was the main analytical parameter used to characterize the reaction progress, although COD, AOX and color also received periodic attention. Conditions such as the catalyst load, light intensity, pH, temperature, and concentration of O2 and organic matter were changed through several series of experiments in order to determine their effect. A zero order kinetics accounts for the observed variation of TOC with time during most of the reaction, the rate constant being 0.25-0.40 ppm min-1 at 25 °C. This behavior is explained in terms of a Langmuir-Hinshelwood rate equation in a highly substrate concentrated system.
KW - Organic contaminants
KW - Paper pulp
U2 - 10.1016/S1010-6030(97)00146-9
DO - 10.1016/S1010-6030(97)00146-9
M3 - Article
VL - 109
SP - 281
EP - 286
JO - Journal of Photochemistry and Photobiology A: Chemistry
JF - Journal of Photochemistry and Photobiology A: Chemistry
SN - 1010-6030
IS - 3
ER -