Photocatlytic oxidation of congo red dye by using Co2O3-Cr2O3 as a photocatalyst

الملخص EN

Homogeneous crystalline chromium and cobalt oxides (Cr2O3- Co2O3) was prepared by coprecipitation method by mixing metals nitrate in the basic medium and the precipitate was calcinated at 700 oC for 6 hrs.

The crystalline structure of the synthesized products were analyzed by X-ray diffraction (XRD).

The obtained XRD patterns of specimens revealed formation of a well-crystallized structure of double oxides after calcination at 700 oC.

The photocatalytic activity of double prepared oxides was investigated via following removal of congo red dye from the aqueous solution upon irradiation of reaction suspension under irradiation with UV light.

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Diatomic Index and Biological water Quality.

Furthermore, the study included the diversity indices such as Simpson index, Richness Index, Shannon-Weaver Index, Evenness Index and McIntoch Diversity Index.

According to these indices the quality of the river is ranged from less polluted to moderate pollutes., as well as, they indicate the trophic status of the river.