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Register a new userDetection of Organochlorinated Pesticides residue in sediments and some mollusks of Tartous coast
تقصي متبقيات المبيدات الكلورية العضوية في الرسوبيات و بعض الرخويات في ساحل طرطوس
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Tishreen University ورقة بحثية
Publication date
2015
fields
Biology
and research's language is
العربية
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دُرس تركيز ثمانية مبيدات كلورية هي: gamma HCH، Heptachlor، Heptachlor epoxide، Aldrin، Dieldrin، 4,4,DDE، 4,4,DDD، 4,4,DDT في أنواع من الرخويات هي: Monodonta turbinata, Brachidontes variabilis , Patella caerulea, Trochus erithraeus, Strombus persicus و الرسوبيات في خمسة مواقع هي: مصب نهر السن، مصب نهر جوبر، محطة بانياس الحرارية، موقع الباصية و مصب نهر مرقية ضمن ستة أزمنة لجمع للعينات خلال عامي 2006 – 2007. أشارت نتائج الدراسة إلى أن أعلى مراكمة للمبيدات الكلورية كان في مصب نهر السن، مصب نهر جوبر، و مصب مرقية حيث راكمت الرخويات المدروسة تراكيز مختلفة من جميع المبيدات الكلورية الثمانية المدروسة، أما موقع المحطة الحرارية، فقد كان مبيدا الـ Heptachlor و الـ Heptachlor epoxide هما المركبان الرئيسان، في حين كانت تراكيز الملوثات (المبيدات) في موقع الباصية أقل من بقية المواقع.
Concentrations of eight chlorinated pesticides: namely, gamma HCH, Heptachlor, heptachlore epoxide, aldrin, dieldrin, 4,4-DDE, 4,4-DDD, and 4,4-DDT were studied in some mollusks species Monodonta turbinata, Brachidontes variabilis , Patella caerulea, Trochus erithraeus, Strombus persicus and in sediments taken from five different locations: Assin estuary, Jobar estuary, Banias Thermal Electricity Station, Albasia, and Mirkiya River estuary. Sampling was performed at six different times during the period 2006-2007. Results indicated that Assin estuary contained the highest level of contamination followed by Jobar estuary and Mirkiya estuary where sampled mollusks species contained various concentrations of all of the studied pesticides. At Banias Thermal Electricity Station samples showed contamination with heptachlore and heptachlore epoxide only, whereas the concentration of pesticides at Albasia location, much lower than the other locations.
References used
BARAKAT A. O.; MOONKOO, K.; YOARONG, Q,; WADE, T. L. Organochlorine pesticides and PCB residues in sediments of Alexandria Harbour, Egypt. Mar Pollut Bull., 44(12), 2002, 1426-34
1426-34. BARAKAT, A. O; MOSTAFA, A; WADE, T. L, SWEET, S.T, E.L SAYED, N. B Distribution and ecological risk of organochlorine pesticides and polychlorinated biphenyls in sediments from the Mediterranean coastal environment of Egypt. Chemosphere, 93(3), 2013, 545-54
BELLER, H.R.; SIMONEIT, B.R. Polychlorinated biphenyls and hydrocarbonsdistributions among bound and unbound lipid fraction of estuarine sidement, in of Organic Marine Geochemistry, (Sohn, M.L., ed), Chapter 12, 1986, 198-214, American Chemical Society, washington, D.C
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The aim of this study isto determinat the concentration of (Pb, Cu, Cd, Co, Cr , NiZn,
Fe) in storm water and their content of sediments during four seasons, the samples were
collected in four areas along Tartous beach. After make necessary treatme
nt concentrations
of elements determination by flame atomic absorption spectrometry.The results showed a
high levels of elements iron and zinc, in stormwater (138.6 μg/l - 99.7 μg/l) and sediments
(17.863 μg/l – 138.735 ppm), in all samples and there were concentrations another
elements difference between stations and rainfalls related to the human activities.
This research focuses on determination the concentration of some heavy metal
elements (Nickel Ni and Cadmium Cd) in the coastal water sediments of Ras Al-Basit
(Latakia ) during the period that range between Autumn 2013 and Summer 2014 using the
A
tomic Absorption (Atomic Absorption Spectrophotometer: AAS) at two different (closed
and open) geographical regions.
The results of the research indicate a correlation monumental between the change in
the concentration of studied metallic elements (Ni & Cd), the quality and sediment
sampling sites on the one hand, and the sources of pollution on the other. It observed the
rule of fine sand with minor amount of clay in the sediments collected from closed area;
with high concentrations of both Nickel (755.50mg/Kg), and Cadmium (71.30μg/ Kg),
compared with the open area while the majority of the sediments are medium sand with
low Nickel and Cadmium concentrations (38.85mg/Kg; 13.31μg/ Kg).
This research aimed to study the theoretical basis of the pollutant migration
to the aquifer and to carry out some experiments concerning the migration of
some kinds of pesticides in order to calculate the related coefficients. Hence, the
research
concentrates on testing the basic methods of migration to the ground
waters, finding the physico – chemical reactions between pollutants and aquifer
and finding the differential equations which express the movements to the
ground waters which can be applied on the experimental data. It also, includes
the mechanism study of pollutant migrations through the unsaturated layer is
regarded as a passage of the pollutants to the ground waters, and the
experimental methods of the calculation of the basic migration coefficient.
This study was carried out on soil samples collected from Damascus
country side (Alghota – Jesrin), in order to study the impact of organochlorine
insecticides resulted from heavy use for a long time.
The duration of experiment was ١١ monthes cove
ring four season
condition. Samples were taken from two levels, the surface (١٠ cm) and the
deep levels (٣٠-٤٥ cm). Soil samples were extracted by acetone, hexane and
chloroform solvents. Residues were detected by using GC.
The research was performed by isolating some species of soil- fungi from agricultural soils
handling with different pesticides and fungicides. Where the following fungi were isolated:
Aspergillus niger (The isolates A1 and A2), Fusarium oxysporum (
The isolate F),
Trichoderma harzianum (The isolate T). Also F. solani (The isolate F7) and T. viride (The
isolate T.v) were used, whereas they were taken from high studies laboratory- Science
Faculty- Tishreen University at a previous search.
The research was conducted to assay the ability of the previous fungi to degradation a
number of pesticides, the insecticide "Dolan", the insecticide "Plantocide", the nematicide
"Vydate" and the fungicide "Bayfidan", through the effect of double dose of each
pesticides in the biomass of the studied fungi on PDB medium. In addition to analysis the
results residues of pesticides using Spectrophotometer, and evaluation the pH values.
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