Astrahan P, Silverman J, Gertner Y, Herut B
Israel Oceanographic and Limnological Research, Haifa 31080, Israel.
Israel Oceanographic and Limnological Research, Haifa 31080, Israel.
Mar Pollut Bull. 2017 Mar 15;116(1-2):521-527. doi: 10.1016/j.marpolbul.2017.01.006. Epub 2017 Jan 8.
A study of deep sea sediment quality was conducted at 52 stations off the Mediterranean coast of Israel (50-1900m depth). Total Organic Carbon (TOC), Polycyclic Aromatic Hydrocarbons (∑PAHs), Poly Chlorinated Biphenyls (∑PCBs) ranged between 0.58 and 1.44%, 12-190 and <0.3-7.7μgkg, respectively. The TOC distribution indicated the Nile delta as an important source of organic matter and the important effect of topography on deposition patterns in this region. PCBs and PAHs quantitative levels were associated with nearby gas well drilling (well below environmental criteria) and dredge-material dumping sites. A significant correlation between these pollutants and TOC was found in the southernmost stations suggesting a common source. PAHs isomer ratios in most of the stations indicated a petrogenic source, while the contribution of pyrogenic sources appears to be very small. These findings form a sound baseline for assessing the potential impact of future deep sea drilling activities that are expected to increase significantly in the Eastern Mediterranean basin.
对以色列地中海沿岸52个站点（深度为50 - 1900米）的深海沉积物质量进行了一项研究。总有机碳（TOC）、多环芳烃（∑PAHs）、多氯联苯（∑PCBs）的含量分别在0.58%至1.44%、12至190以及<0.3至7.7微克/千克之间。TOC分布表明尼罗河三角洲是该区域重要的有机物来源，且地形对该区域的沉积模式有重要影响。多氯联苯和多环芳烃的定量水平与附近的气井钻探（远低于环境标准）及疏浚物倾倒场有关。在最南端的站点发现这些污染物与TOC之间存在显著相关性，表明存在共同来源。大多数站点的多环芳烃异构体比例表明其来源为成岩成因，而热解成因的贡献似乎非常小。这些发现为评估未来预计将在地中海东部盆地显著增加的深海钻探活动的潜在影响奠定了坚实的基础。
