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دراسة لنوعية المياه وتركيز الهيدروكربونات النفطية وبعض العناصر النزرة في المياه الجوفية للابار القريبة من مصافي الجنوب في منطقة الشعيبة - البصرة جنوب العراق == Study Water Quality and Concentration of Petroleum Hydrocarbons and Some Trace Elements in Groundwater of Wells Near South Refineries in Al - Shiaba region - Basrah, Southern Iraq
Author name:
بثينة مهدي يونس
Supervisor name:
باسم يوسف الخفاجي
General topic:
Biology
Specific topic:
Environment - Environmental pollution
Degree:
Master
University:
University of Thi-Qar - College Of Science
Language:
Arabic
University location:
Dhi Qar
First pages:
24T3168 - p.pdf
Abstract:
The present study was carried out to determine the concentration of total petroleum hydrocarbons in two phases dissolved and suspended in water, and Water Quality, in addition to three trace metals nickel Ni, lead Pb and cadmium Cd were determined in the groundwater, in eight wells. Six wells from W1 to W6 close to the source of pollution about half kilometer to three kilometer and two wells (w7 - w8) were far with in12.5Km from the mentioned source pollution area (well control).Wells were located on surrounding southern refineries (Al - hiaba ) - Zubair - Basra in southern Iraq .Water samples were collected seasonally from autumn 2015 to summer 2016.The present study including, the measurements of some environmental factors, water and air temperatures , salinity, electrical conductivity, turbidity, total dissolved soluble solids (TDS), pH , dissolved oxygen , total hardness and chloride ions .Results were ranged between ,( 19.5 - 48.8) ºC ( 25.0 - 29.3) ºC , (4.35 - 10.95) mg∕L, (5.01 - 11.45) mS ∕cm , (1.110 - 6.803) NTU , (3206 - 7328) mg∕L (7.05 - 8.72) , (1.35 - 12.25) mg ∕L ,(1275 - 4200) mg ∕L and ( 1560 - 5416) mg∕L respectively .Total petroleum hydrocarbons (TPHs) were determined using spectroflurometer . Results showed that concentrations of means TPHs as dissolved fraction in water were in all wells highest in spring 2016 than winter then autumn 2015, while less concentration recorded was during summer 2016.The highest mean concentration was 35.91 μg /L in well W1 in a spring 2016 while lowest value 0.73μg/L in well W7 in summer 2016 . Results of highest means concentrations of TPHs particular fraction in water were 137.39 μg /g dry weight in well W1 in spring 2016 and lower means concentrations of TPHs particular fraction 9.89 μg /g dry weight in well W8 summer 2016. Sixteen compounds of Polycyclic Aromatic Hydrocarbons(PAHs) were identified in water (dissolved and particulate fractions ) during spring 2016 using a liquid Chromatograph high performance (HPLC). The total concentrations of dissolved PAHs in water ranged between the highest concentration 7205 ng∕L in well W1, and lowest concentration 39.1 ng∕L in well W8 ,the highest concentration of Phenanthrene compound in well W1 was 3472 ng∕L and lower concentration for Benzo(a) Pyrene compound was 0.37 ng∕L in well W8,was the more dominate PAHs compound in dissolved phase recorded Benzo(b)Fluranthene .The total concentrations of PAHs particular fraction ranged between the highest concentration 9334 μg /g dry weight in well W1, while lowest concentration 370 μg /g dry weight in well W8.The more dominant PAHs compound as particular fraction Fluorene in spring season ,were compound Dibenzo(a,h)anthracene has a highest concentration 6689 ng∕g dry weight in well W3 and the to west concentration compound was Benzo(a)anthracene ng∕g in well W8. Results recorded highest concentration of lead 0.933 μg /L in well W1 in spring 2016 and lowest concentration 0.208 μg /L in well W7 in summer 2016. While means concentrations of nickel ranged between 0.445 μg /L in well W1 in winter 2016 and lowest concentration 0.055 μg /L in wellW8 in autumn 2015.Cadmium record its highest level 0.496 μg /L in well W3 in spring 2016 and lowest concentration 0.053 μg/L in well W8 in summer 2016.Results of this revealed that southern refineries have a major effects on ground water pollution in vicinity of oil fields by some hydrocarbons derived from those refineries
