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التراكم الحيوي للهيدروكربونات في الكتلة الحية لبعض بطنية القدم الارضية والمائية في مدينة بغداد == Bioaccumulation of Hydrocarbons in the Biomass of Some Terrestrial and Aquatic Gastropods in Baghdad City
Author name:
زهراء احمد شاكر
Supervisor name:
عماد الدين عبد الهادي المختار
General topic:
Biology
Specific topic:
Environment
Degree:
Master
University:
University of Baghdad - College Of Science For Girls
Language:
English
University location:
Baghdad
First pages:
24T3484 - p.pdf
Abstract:
In the present study, the concentrations of total petroleum hydrocarbons (TPHs) in tissues and shells of the aquatic and terrestrial gastropods (Melanopsis nodosa and Monacha cantiana) were evaluated.Samples were collected from six sites within Baghdad city which was divided into two sectors, a northern sector and a southern sector whereas each was represented by sampling sites of aquatic and terrestrial habitats to best represent the area affected by hydrocarbon residues.Samples of sediments, soils and snails (collected once every two months for the period from November 2014 to May 2015) were analyzed by using Gas Chromatography (GC). The levels of TPHs ranged between (0.14 - 2.58) μg/g in sediments and soils, between (0.21 - 3.48) μg/g in snail tissues and between (0.10 - 2.65) μg/g in snail shells.The concentrations of TPHs in the biomass of aquatic and terrestrial snails showed significant seasonal variations and strongly dependent on the amount of TPHs in the surrounding media. The concentrations of TPHs in snail biomass were below the permissible limit recommended by world health organization (WHO).The physical and chemical properties of the river water and soil recorded several values ranged between 12.4 - 24.4ºC, 10.0 - 23.7ºC, 705.0 - 1016.0 μs/cm, 344.0 - 1050.0 μs/cm, 7.2 - 8.2, 8.3 - 8.8, 81.3 - 164.0 mg/L, 125.0 - 188.0mg/L, 7.1 - 10.2 mg/L, 2.2 - 5.3 mg/L, 16.53 - 25.42% and 1.46 - 2.84% for water temperature, soil temperature, electrical conductivity of water, electrical conductivity of soil, hydrogen ion concentration in water, hydrogen ion concentration in soil, calcium ion concentration in water, calcium ion concentration in soil, dissolved oxygen, biological oxygen demand, soil moisture and soil organic matter respectively in study area.The study showed a significant positive correlation between TPHs concentration in snail biomass and hydrogen ion concentration in water, electrical conductivity of soil, soil moisture and soil organic matter. Besides, a significant negative correlation was detected between TPHs concentration in snail biomass and water and soil temperature and calcium ion concentration in water and soil.
