الفهرس 
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Abstract
This study aims to evaluate some sources of lead pollution and their impact on soils, plants, water and human health. To achieve these goals, the study included the effect of point source of pollution (PS) and non-point source of pollution (NPS) on soils, plant and water
Five water samples were collected from the discharges (outlet) of from industerial factories; Talkha Fertilizers, El-Mahalla “Spinning and fabric” & Pigments, Marble “Zekry Ghazy” and Ceramics gravina.
To cover this point, soil and plant wheat (Triticum astevium) and rice (Oryza sativa) samples were collected from two sites at El-Mansoura – Meet Ghamr main road ; Selka and Nequeita to evaluate the effect of vehicle exhaust on Pb concentrations in soils and plants. In these locations, soil and plant samples (0 – 20 cm) were taken from each location at distance of 10, 200, 400 and 600 m from road side according to the wind direction.
Highest Pb concentration (0.75 mg/l) was recorded in the effluent of the outlet of Pigments industry, while the lowest (0.15 mg/l) was recorded in the discharge of Talkha Fertilizers factory.
Soils affected by traffic exhaust:
• The highest values of available Pb, in soils affected by traffic exhaust, were recorded in soils near the roadside and 10 m from roadside. These values were gradually decreased as the distance increases from roadside.
• Soil content of total Pb at Nequeita location were 105.33, 103.2, 111.15 and 101.79 mg.kg-1 and were 120.41, 112.95, 112.52 and 96.31 mg.kg-1 for Selka location at the distances 10, 200, 400 and 600 m, from roadside respectively. DTPA-extractable lead at Nequeita location were 3.22, 2.54, 1.16 and 1.04 mg.kg-1 and were 1.84, 1.36, 1.20 and 1.16 mg.kg-1 at Selka location at the distances of 10, 200, 400 and 600 m, from road side respectively.