Document Details

Document Type : Thesis 
Document Title :
STUDY ON POLYCHLORINATED BIPHENYLS AS PERSISTENT ORGANIC POLLUTANTS IN JEDDAH COASTAL SEDIMENTS, RED SEA, SAUDI ARABIA
دراسة عن تواجد مركبات ثنائي الفينيل متعدد الكلور كأحد الملوثات العضوية المستديمة في الرواسب الساحلية لمدينة جدة, البحر الأحمر, المملكة العربية السعودية
 
Subject : Faculty of Marine Sciences - Marine Chemistry 
Document Language : Arabic 
Abstract : This study was conducted to examine the presence and assessment of polychlorinated biphenyls (PCBs) concentrations in marine sediment along Jeddah coast. Thirty surface sediment samples were collected from Jeddah coast, divided into 6 sites. PCBs levels and were quantified by a standard mixture of 19 PCBs congeners. Concentrations of ∑ 19 PCBs at the study area are ranged from ND to 15.63 ng/g dry weight. While the mean concentrations for 6 sites were decreased in the following order: site 5 (Al-Arbaeen Lagoon) > site 4 (Al-Shabab Lagoon) > site 6 (South Corniche) > site 3 (Bankala Rigion) > site 2 (North Corniche) > site 1 (North Obhour) (ND). The highest concentrations were recorded in the semi closed lagoons (sites 4 and 5) which highly influenced by sewage dumping. PCBs concentrations shows a positive correlation with TOC % (r = 0.9393) and mud % (r = 0.9561). PCB congener # 87 (penta-CB) was dominant at all sites. A descending order of different homologues was as the following: penta-CB > tetra-CB > hexa-CB > mono-CB > tri-CB > hepta-CB > nona-CB. Medium homologues penta-, tetra- and hexa-CBs present as dominant homologues at all sites which represent the main component of Aroclor 1254. As expected, different environmental conditions change the homologue percentage in some stations, with probability of the presence of some other lighter or heavier Aroclor mixtures (1248, 1260). Contamination levels of PCBs can be categorized as moderate to low compared to other urbanized regions worldwide, as well as they were considered far from the international hazard levels. 
Supervisor : Dr. Adnan J. Turki 
Thesis Type : Master Thesis 
Publishing Year : 1434 AH
2013 AD 
Co-Supervisor : Dr. Amr El Maradny 
Added Date : Monday, June 24, 2013 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
كاظم محمود سلطانSultan, Kazem MahmoudResearcherMaster 

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