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Information Seminar Paper

Title

PHOTOCATALYTIC DEGRADATION OF AQUEOUS STYRENE: STATISTICAL OPTIMIZATION

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Abstract

 IN PRESENT STUDY, THE CENTER COMPOSITE DESIGN IN RESPONSE SURFACE METHODOLOGY (RSM) WAS FIRSTLY APPLIED TO OPTIMIZE THE PHOTOCATALYTIC DEGRADATION OF AQUEOUS STYRENE WITH HIGH CONCENTRATION UNDER UV/TIO2 SYSTEM. TWENTY EXPERIMENTS WERE DONE BY ADJUSTING THREE PARAMETERS (STYRENE AND TIO2 CONCENTRATIONS, PH) AT FIVE LEVELS. BASED ON THE EXPERIMENTAL DESIGN, AN EMPIRICAL EXPRESSION WAS FIRSTLY ESTABLISHED AND SUBSEQUENTLY APPLIED TO PREDICT THE PHOTOCATALYTIC DEGRADATION EFFICIENCY OF AQUEOUS STYRENE. THE RESULTS SHOWED THAT THE EXPERIMENTAL PHOTOCATALYTIC DEGRADATION EFFICIENCIES MATCHED WITH THE THEORETICALLY PREDICTED VALUES VERY WELL WITH A HIGH CORRELATION. OPTIMAL EXPERIMENTAL CONDITIONS FOUND FOR AQUEOUS STYRENE (115 MG L-1) DEGRADATION WERE INITIAL PH 7 AND TIO2 LOADING 2 G L-1. THE PHOTOCATALYTIC DEGRADATION EFFICIENCY OF AQUEOUS STYRENE UNDER THIS CONDITION REACHED TO 79.2%.

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