الفهرس 
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Abstract
configuration, studying the number and diameter of glass tubes to raise UV
penetration and the efficiency of the reactor. The results show 96% of MB
removal was obtained using 3 tubes with an external diameter of 26 mm.
This was followed by the application of optimal operating condition
obtained in the treatment of cationic, ionic and neutral dyes to represen
residues under a wider range.
The results showed that the proposed treatment capacity of these dyes varie
as follows: neutral pigment (90%)> cationic (60%)> anionic (45%). Applie
to realistic samples of two different dyes under ideal conditions, the averag
treatment ratio with chemical oxygen demand (COD) removal was 66%.
As for the improving of titanium dioxide, different combinations o
Nano-sized catalysts were prepared by loading of titanium dioxide on reduc
graphene oxide (RGO) or activated carbon (AC) by hydrothermal method t
improve its photocatalysis. These compounds were characterized b
scanning electron microscopy (SEM), x-ray diffraction (XRD). Th
comparison was performed using TiO2, TiO2/RGO (5% weight ratio) an
TiO2/AC (5% weight ratio) under optimum operating conditions obtaine
previously. It was found that all of these combinations positively affected th
removal of the MB, but at varying rates as follows: TiO2/AC (95%)
TiO2/RGO (72%) > TiO2 (65%). This is due to an increase in the surfac
area of the TiO2/AC (146 m2/gm), compared to TiO2/RGO (102 m2/gm) an
TiO2 (52 m2/gm).