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Mohamed Youssef Ali MOHAMED محمد يوسف علي محمد

Professor

أستاذ الأحافير والطبقات

كليات العلوم
Building 4, floor 2, Office 2 B 124
المنشورات
مقال فى مجلة
2016

Distribution of mercury in molluscs, seawaters and coastal sediments of Tarut Island, Arabian Gulf, Saudi Arabia

Al-Kahtany, Mohamed Youssef , Abdelbaset El-Sorogy, Khaled . 2016

In order to assess the distribution of mercury along the Tarut coast, Arabian Gulf, Thirty eight (38) sediment samples, twenty six (26) seawater samples, and forty (40) Mollusca specimens were collected from the Tarut coast. The concentrations of Mercury in the sediments of the studied area (average ¼ 0.55 mg/g) are generally high comparing to the reported values from the Gulf of Oman, Red Sea, and the Gulf of Finland. The concentrations of Hg exceeded the wet threshold safety values (median effect concentration (MEC), and probable effect concentration (PEC) indicating possible Hg contamination. According to the Swedish Environmental Protection Agency (SEPA), thirty four (34) samples occur in
class 4 and four (4) samples occur in class 5, which means that the sediments of the Tarut Island are largely contaminated with Hg. Enrichment factor (EF) results (average ¼ 1.76) suggested that, the coastal sediments of the Tarut Island are considered to entirely originate from the crustal materials or natural processes. The studied sediments show lower values (Igeo<0) indicating that the sediments are unpolluted. These sediments according to contamination factor (Cf) are considered contaminated with Hg (1 < CF < 3). The Hg concentration in water samples (average ¼ 30 mg/g) considered high. Comparison with Hg contents in coastal sediments, seawaters and molluscs in the Red Sea, the Arabian Gulf suggested that the studied samples have higher concentrations of Hg. The suggested natural sources of Hg in
the study area are the weathering and decomposition of neighboring deserts. The anthropogenic sources are the land reclamation, petrochemical industries, boat exhaust emissions, oil leakage, desalination plants and sewage effluents exceeded in the study area and in Al Jubail industrial city to the north. 

نوع عمل المنشور
article
رقم المجلد
124
مجلة/صحيفة
Journal of African Earth Sciences.
الصفحات
365-370
مزيد من المنشورات
publications

The upper Campanian to upperMaastrichtian sedimentary sequence of the Kiseiba Formation in southWestern Desert is sampled and described in two surface sections (Sinn El Kaddab and Wadi Abu Siyal…

بواسطة Mohamed Youssef & Abdelbaset El-Sorogy
2018
publications

To assess heavy metals in mangrove swamps of Sehat and Tarut coastal areas along the Arabian Gulf, 18 sediment samples were collected for Al, V, Cr, Mn, Cu, Zn, Cd, Pb, Hg, Sr, As, Fe, Co, and Ni…

بواسطة Khaled Al-Kahtany, Abdelbaset El-Sorogy, Fahd Al-Kahtany, Mohamed Youssef
2018
publications

Present work aims to document the distribution and metal contamination in the coastal sediments of the
Dammam Al-Jubail area, Saudi Arabian Gulf. Twenty-six samples were collected for Al, V…

بواسطة Abdelbaset El-Sorogy, Khaled Al-Kahtany, Mohamed Youssefa, Fahd Al-Kahtany, Mazen Al-Malky
2018