Endurance test of TiO2-based photocatalytic oxidation
article
The long term behaviour of suspended photocatalysts (Degussa P25) is studied in two endurance tests. Model waste water with an acid dye (Special Brilliant Blue FFR) or 4-chlorophenol as main contaminant have been used. Titanium dioxide is recovered from the effluent by pressure filtration and reused in the leed.
A change in suspension behaviour of the titanium dioxide was observed over the period of the endurance tests (approx. 400 h). The photocatalytic activity de-creased in the same period by approx. 55% in the case of chlorophenol and ap-prox. 25% in the case of the dye. Intermediates from the chlorophenol degradation have been identified. The result of the tests are fitted to a physical model of the process. They are also usefull for improved reactor design.
A change in suspension behaviour of the titanium dioxide was observed over the period of the endurance tests (approx. 400 h). The photocatalytic activity de-creased in the same period by approx. 55% in the case of chlorophenol and ap-prox. 25% in the case of the dye. Intermediates from the chlorophenol degradation have been identified. The result of the tests are fitted to a physical model of the process. They are also usefull for improved reactor design.
TNO Identifier
256097
Source
Journal of Advanced Oxidation Technologies, 3(2), pp. 138-144.
Publisher
TNO
Pages
138-144
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