El-Said Ghada F, Draz Suzanne E O, El-Sadaawy Manal M, Moneer Abeer A
a Marine Pollution Department, Environmental Division, National Institute of Oceanography and Fisheries, Kayet Bay , El-Anfoushy , Alexandria , Egypt.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2014;49(9):1029-44. doi: 10.1080/10934529.2014.894853.
Spatial distribution of heavy metals (Co, Cu, Ni, Cr, Mn, Zn and Fe) was studied on Lake Edku's surface sediments in relation to sedimentology and geochemistry characteristics and their contamination status on the ecological system. Lake Edku's sediments were dominated by sandy silt and silty sand textures and were enriched with carbonate content (9.83-58.46%). Iron and manganese were the most abundant heavy metals with ranges of 1.69 to 8.06 mg g(-1) and 0.88 to 3.27 mg g(-1), respectively. Cobalt and nickel showed a harmonic distribution along the studied sediments. The results were interpreted by the statistical means. The heavy metal pollution status and their ecological risk in Lake Edku was evaluated using the sediment quality guidelines and the contamination assessment methods (geoaccumulation, pollution load and potential ecological risk indices, enrichment factor, contamination degree as well as effect range median (ERM) and probable effect level (PEL) quotients). Amongst the determined heavy metals, zinc had the most ecological risk. Overall, the heavy metals in surface sediments showed ecological effect range from moderate to considerable risk, specially, in the stations in front of the seawater and in drain sources that had the highest toxic priority.
研究了埃及艾德库湖表层沉积物中重金属（钴、铜、镍、铬、锰、锌和铁）的空间分布，及其与沉积学和地球化学特征的关系，以及它们对生态系统的污染状况。艾德库湖的沉积物以砂质粉砂和粉质砂质地为主，碳酸盐含量丰富（9.83 - 58.46%）。铁和锰是含量最丰富的重金属，含量范围分别为1.69至8.06毫克/克和0.88至3.27毫克/克。钴和镍在所研究的沉积物中呈和谐分布。通过统计方法对结果进行了解释。利用沉积物质量指南和污染评估方法（地积累指数、污染负荷指数和潜在生态风险指数、富集因子、污染程度以及效应范围中值（ERM）和可能效应水平（PEL）商）评估了艾德库湖的重金属污染状况及其生态风险。在所测定的重金属中，锌具有最大的生态风险。总体而言，表层沉积物中的重金属显示出从中度到相当大风险的生态效应，特别是在海水前沿和排水源的站点，这些地方具有最高的毒性优先级。
