الفهرس | Only 14 pages are availabe for public view |
Abstract Water pollution has gained a lot of attention worldwide because wastewaters from various industrial sectors cause serious environmental and health problems. The wastewater from the textile industry containing even a very low concentration of dyes can cause waste streams to become intensely coloured. Crystal violet (CV) dye is a well-known dye that is used in a variety of ways such as a biological stain, dermatological agent, veterinary medicine, additive to poultry feed to inhibit propagation of mould, intestinal parasites and fungus. CV is well known for its mutagenic, teratogenic and mitotic poisoning nature as well as low biodegradability. Furthermore, CV is the brightest water-soluble class; therefore, the existence of CV molecules in solution even at a low concentration of 1.0 mg L -1 can cause several inhibitive effects on the photosynthesis of aquatic plants. Therefore, it is essential to decolourize CV dye-laden water or remove it from aquatic environments. Nanocatalysts are capable to decrease the amount of hazardous by-products. The effect of different photocatalysts (MgO NPs, NiO NPs and CaO NPs) on the photocatalytic degradation of crystal violet (CV) was studied. The degradation efficiency reached to 99.19%, 95.58% and 90.07% at 130 min with MgO NPs, NiO NPs and CaO NPs, respectively. MgO NPs have the best performance in photodegradation, so MgO NPs was chosen to complete the study |