الفهرس 
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Abstract
Many industries such as textiles use dyes in order to colour their products. The presence of these dyes in water even at very low concentration is highly visible and undesirable. Also Phenol is one of the major pollutants in the wastewater because of its presence in the effluent of major processing and refining plants. A photo catalysts which are g-C3N4, CuO and a mixture of (80% C3N4 20% CuO by weight) is prepared. The prepared photocatalysts then characterized and study the possibility of using them in the removal of direct orange dye (D034) and phenol by adsorption and photocatalysis techniques. The effect of operating conditions namely; contact time, initial concentration, pH and the catalyst dosage on the % removal of these organic pollutants from aqueous solutions were studied. The experiments were carried out using batch system and the results revealed that the % removal by adsorption and photocatalysis of both D034 and phenol increases by increasing the contact time till saturation takes place. The % removal by adsorption and photocatalysis decreases by increasing the initial concentration of D034 and phenol. Also the % removal of D034 by adsorption and photocatalysis decreases by increasing the pH. But for phenol removal by adsorption and photocatalysis; the % removal is the optimum at pH=S. The % removal by adsorption and photocatalysis increases by increasing the adsorbent/photocatalyst dose. The results showed that photocatalytic degradation of D034 and phenol follows the pseudofirst order kinetics expression by using g-C3N4 and the mixture of (80% C3N4, 20% CuO) and it obeys Langmuir-Hinshelwood kinetics expression. While the adsorption of both D034 and phenol on g-C3N4 and (80% C3N4, 20% CuO) obeys both Freundlish and Langmuir adsorption isotherms but it tends more to obey Langmuir isotherm. The adsorption kinetics of D034 on g- C3N4 and (80% C3N4, 20% CuO) obeys the pseudo-first order kinetics expression. But the adsorption of phenol on g-C3N4 and (80% C3N4, 20% CuO) obeys both pseudo-first and pseudo second order kinetics.