اثر استخدام المروقات في تنقية مياه الشرب

Abstract

Abstract . This study attempts to investigate the performance and economic potential of local materials in reducing water turbidity, especially during the flood season. For the purpose of this study, we use some local materials (clay and plants), used by -local people in water purification. Samples of clay used include Bentonite and Kaolin whereas samples of plants comprise Moringa oleifera seeds and Maerua pseudopetalosa roots, which are available in the Sudan. Solutions obtained from these samples were added in different doses to raw water. In order to examine the performance of these matyrial, turbidity and the pH of the treated water were measured and the results obtained were compared to those obtained from the water treated with Alum and Polymer. Generally, results of the investigation show that local materials are very efficient in reducing turbidity. of raw water in comparison to imported materials. Thus results of the study suggest that: Bentonite proves to be very efficient in removing suspended matters in natural water. Adding conc Sulphuric acid. to Bentonite improves water treatment efficiency. Furthermore, Bentonite + Sulphuric acid conc. gave better water treatment efficiency than the imported Polymer (i.e. efficient in reducing water turbidity). Solutions obtained from Kaolin and Maerua pseudopetalosa plant also gave better water treatment efficiency. As for Moringa oleifera, results show that fresh Moringa seeds gave better water treatment efficiency than stored Moringa seeds, which indicates that performance of Moringa oleifera seeds decreases with storage. Statistical analysis is conducted to examine the relationship between different doses on one hand and turbidity and acidity on the other hand. Finally, we consider phases of water clarification, physical and chemical properties of water, water usages as well as the materials and methods used in tests.