د.محمد الطاهر المحبس2026-10-052026-10-05https://dspace.academy.edu.ly/handle/123456789/2580Due to their low biodegradability, a conventional biological treatment process is not very effective in treating dye wastewater Photocatalytic degradation has a great potential to control aqueous contaminants or pollutants There are various methods for removal of organic and inorganic compounds from the wastewater as filtration, electrolysis, precipitation, ion exchange and adsorption process Most of these methods require high capital and recurring expenditure and consequently they are not suitable for small scale industries The photocatalysis is new, fast, convenient and less expensive method for degradation of methylene blue (MB) was applied. Among the various oxides semiconducting photocatalysts TiO2 and ZnO are importantThe photocatalysis has focused on the use of nanosized semiconductor materials as photocatalysts for the removal of ambient concentration of organic and inorganic species from aqueous or gas phase systems in environmental clean-up, drinking water treatment, industrial and health applications . Photocatalysis, i.e. using semiconductor particles under sufficient irradiation energy for the simultaneous reduction and oxidation of different redox system, has been intensively studied during the last 30 years . Dyes usually have complex aromatic molecular structure which makes them more stable and difficult to biodegrade. Many dyes are toxic, and may cause destruction or inhibiting of their catalytic capabilities. To reduce the risk of environmental pollution from such waste it is necessary to treat them before discharging to the receiving environmentCHARACTERIZATION OF PHOTOCATALYST