الفهرس 
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Abstract
The access to safe and clean drinking water is a major concern throughout the world. Conventional methods are used to improve water quality. Aluminium sulphate (alum) is widely used water coagulant. The use of chemicals for water treatment raises a lot of concerns over safety issues. These limitations make it essential for environmentally friendly drinking water purification methods to be introduced. The use of traditional natural coagulants of plant origin is a simple, reliable and cost-effective method of purifying water. The efficiency of Moringa Oleifera seed extract (MOSE) as a coagulant for domestic water purification was investigated using the Jar Test and compared with aluminum suthate (alum) as a control. The physicochemical and biological parameters were investigated for both raw and treated water. Results of this study reveal that concentration of ammonia (NH3) increase in the most purified water treated with (MOSE) as compared to alum and raw water. Turbidity, chlorides, Fe, Mn, total algae count and total coliform are decreased in most concentrations. These findings suggested that MOSE can be used as a biocoagulant for water treatment due to the presence of short cationic polypeptides in the seed. While, it could also be suggested that instead of using the seed powders for water clarification; one could use only the purified proteins extracted from the Moringa seeds. These proteins show effective removal efficiency of ammonia and nitrates which increased in the water samples treated with MOSE. The results of the physiological parameters tested at the point of sample collection, 10% stock alum solution and 2%, 5% and 10% M. oleifera stocks. The mean values of the physicochemical parameters of the water samples after treatment with 10% stock alum were no changed or slightly changed for most parameters. But, 10% M. oleifera stock in the second month was the most affected stock and the lung and heart were the most affected organs. The previous results indicated that aluminum (Al) is not a transition metal and cannot start per-oxidation; numerous studies have looked for a connection between Al accumulation and oxidative damage in different organs. In contrast, the conclusions of our search discovered that long-term exposure of aqueous Moringa oleifera seed extract (MOSE) at 10% stock induce the accumulation of destructive phytocompounds. M. oleifera proved to be an effective water coagulating and antimicrobial agent for water purification, but the long term can produce harmful phytocompounds and induce stress on the cell.