Distribution and diagenesis of trace metals in marine sediments of a coastal Mediterranean area: St Georges Bay (Lebanon)

MARINE POLLUTION BULLETIN

卷:155

Article

El Houssainy, Amonda^1,2  Abi-Ghanem, Carine³  Dang, Duc Huy^4,5  Mahfouz, Celine²  Omanovic, Dario⁶  Khalaf, Gaby²  Mounier, Stephane¹  Garnier, Cedric¹ 

[1] Aix Marseille Univ, Univ Toulon, Mediterranean Inst Oceanog, CNRS,INSU,IRD,MIO,UM 110, La Garde, France

[2] CNRS, Natl Ctr Marine Sci, POB 534, Batroun, Lebanon

[3] Lebanese Univ, Fac Sci 3, Tripoli, Lebanon

[4] Trent Univ, Trent Sch Environm, 1600 West Bank Dr, Peterborough, ON K9L 0G2, Canada

[5] Trent Univ, Chem Dept, 1600 West Bank Dr, Peterborough, ON K9L 0G2, Canada

[6] Rudjer Boskovic Inst, Div Marine & Environm Res, Bijenicka Cesta 54, Zagreb 10000, Croatia

关键词: Mediterranean;    Trace metals;    Early diagenesis;    Sediments;    Pore waters;   

DOI  :  10.1016/j.marpolbul.2020.111066

来源: Elsevier

【 摘 要 】

St Georges Bay of Lebanon's coast is an open bay to the Mediterranean Sea. It is exposed to numerous anthropogenic activities such as industrial effluent, untreated wastewater discharge and maritime activities resulting in increasing chemical contamination, especially with trace metals. Contamination with trace metals (Cu, Cd, Co, Pb, As, Ag and Hg) and the influence of early diagenesis on their distribution were studied on both sediments and waters. For this purpose, sediment cores were collected, then treated under inert atmosphere to retrieve pore waters and solid fraction. The area appears to be seriously impacted by the materials transported by the Beirut River and/or by direct inputs, and recent land reclamation using dumpsite material. The sediments showed a significant level of contamination. Element mobility was studied by selective extraction on sediments. The mobility of trace elements from solid fraction to pore waters is controlled by the Fe/Mn cycle and organic matter.

【 授权许可】

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