Abstract— The petrochemicals wastes and pollutants are dumped without treatment in the environment, lakes and soil in Libya. The objective of our present research is to study the impact of waste from crude oil extraction on the environment of the Libyan region of Ajdabiya. The monitored physicochemical indicators are: Temperature, pH, electrical conductivity (CE), TDS, CL- , NO3-, SO42-, HCO3-, Na+, Mg2+, K+, Ca2+, Salinity, Total Hardness (TH). The mineralization faithfully follows the rates of dissolved salts. The electrical conductivity varies from 7880 to 46700 μs/cm and far exceeds the Libyan irrigation standards (>2700μs/cm). Concerning the nitrate their contents range from 230 to 1210 mg/L and clearly reflect the crude oil pollution origin. The Piper diagram and Wilcox-Riversade projections shows that the waters associated with crude oil have a chloride-sodium and potassium or sulphated sodic and slightly bicarbonated sodium or potassium facies. Moreover, the hydrophysico chemical plot shows that the quality of this water is poor and above all a degraded quality.
Keywords— Agriculture, Irrigation, Hydrochimestry, Pollution, Ajdabiya, Libya.
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