الفهرس 
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Abstract
This work was carried to study the pollutants behaviour in soil, water and plant through three investigations during two years (20032004). The first investigation was carried at ElDelta company for fertilizer and chemical industries. The investigated area was located from the north, MeetAntar Village, to the south, electric station, and from the east, River Nile from the west, a railways owing to study the environmental contamination of soil, water and plant around fertilizer?s factory. The second investigation was carried to study the potential hazard of lead from the gasoline exhaust gases as a contaminant to soil, water and plant from motor cars at road sides. The third investigation was carried to study the contamination of soil, water and plant as affected by pesticide application. The obtained results could be summarized as follows: Environmental pollution of soil, water and plant around fertilizers factory The soluble cation values after factory were higher than before Factory in the surface layer except Na+ content in this layer which has a constant value. The soluble anions values after Factory higher than before factory in the surface layer except, HCO3. The EC values after factory position were higher than before it. Concerning with NO3N and NO2N contents (ppm), data show a great variation in the contents of nitrate and nitrite in the area under study. Data also reveal that Nfertilization have highly positive effect on NO3N concentration in the studied area, where NO3N and NO2N content increase with increasing the soil depth before and after the factory. The highest values of studied soluble cations are near the factory and then the subsequent was after it. The lowest values are found before factory in the two periods except K+ cation in the first period which its highest value is found before the factory and the subsequent then around it, while the lowest value is recorded after it. The studied soluble anions have the highest values from the area surrounding factory and subsequently after it, while the lowest values are found before the factory except HCO3 anion in the first period such as K+ cation. The highest EC values are found near factory and then after it, while the lowest values are observed in sites before the factory. The highest pH values are found from the area surrounding factory. Data also, revealed that increasing nitrogen application rate caused an increase in NO3N and NO2N concentration in the first and second periods, The highest values are found near factory and then after it, while the lowest values are observed before the factory. There is no contamination with cadmium was found before the factory in two periods. The highest Cd concentration was noticed near the factory in the first and second periods, respectively. N concentration in plant after the factory highly increased compared to the lowest value of N% before the factory position. The highest and lowest values of K content are observed with after and before the factory position respectively. The higher P content observe after the factory position, while the lowest content was found before it. Potential hazard of lead resulting from the gasoline exhaust gases from motor cars as a pollutant to soil, water and plant at road sides. The extractable Pb in potatoes grown in soil decreases with increasing the distance from the roadside. The rate of decrease was sharp and rapid until 300 m, further decrease with increasing the distance was noticed in ElMansoura Damietta highway. The effect of traffic density on extractable Pb content which was noticed in the surface layers of the soil of different sites, it decreases with increasing the soil depth. Lead content in three water samples was varied among them, the highest value of Pb was found in drainage water of berseem filed and then drainage water of potato field, but the lowest values was found in irrigation water. Lead content in plants (berseem & potatoes) was similar to that of soil extractablePb. The decrease in plant Pb with increasing the distance from highway is due to traffic density and wind speed and direction. Contamination of soil, water and plant as affected by herbicide application Selecron which leached below 20 cm depth degrades much more slowly than in surface soil. After 15 days from application, weep super concentration was low in the surface layers and high in the subsurface layers. This may be due to more leaching under flooding irrigation system with organic acids and also to the effect of sun shines and the other meteorological factor. When weep super concentration was high, organic matter was low which resulted in adsorption of weep super, consequently. Weep super concentration was higher than selecron concentration in drainage water. The high concentration of weep super may due to its high solubility product in the excess water in drainage water alkalines. Stability under neutral moved downward to drains or ground water and slightly acidic conditions. Weep super concentration was higher than selecron concentration in plant. The high concentration of weep super may due to its high solubility and its facility absorption by plant.