Botany Department, College of Science, Tanta University, Tanta 31111, Egypt; Department of Environmental Science and Technology, College of Agriculture and Natural Resources, University of Maryland, College Park, MD 20742, USA.
Botany Department, College of Science, Tanta University, Tanta 31111, Egypt.
Mar Pollut Bull. 2020 Feb;151:110816. doi: 10.1016/j.marpolbul.2019.110816. Epub 2020 Jan 29.
Coastal wetlands of the northern coast of Egypt have been impacted with higher loads of runoff, especially the large urbanized lakes of the Nile deltaic coast. Five urban lakes spanning the northern coast of Egypt (from east to west: Bardawil, Manzala, Burullus, Edku, and Mariut) were sampled for quantifying concentrations of heavy metals in their sediment and plant tissues. Sediment and plant tissues in lake Bardawil were the least contaminated, and the other lakes were moderately to highly polluted with Ni, Co, Cr, Pb, Zn, and Cu. Edku had the highest concentrations of Co, Cr, and Cu (19.83, 45.42 and 68.60 mg kg, respectively). The proportion of clay in sediment was significantly and positively correlated with Co and Ni in sediment (r = 0.7 and P ≤ 0.001), suggesting an important role of clay cation exchange capacity in the sorption of metals and removing them from the water column.
埃及北部海岸的滨海湿地受到了更高流量径流水的影响，尤其是尼罗河三角洲沿海的大型城市化湖泊。对埃及北部沿海的五个城市湖泊（从东到西依次为：巴德拉威尔湖、马纳尔拉湖、布吕卢斯湖、艾德库湖和马里奥特湖）进行了采样，以定量分析其沉积物和植物组织中的重金属浓度。巴德拉威尔湖的沉积物和植物组织污染程度最低，而其他湖泊则受到 Ni、Co、Cr、Pb、Zn 和 Cu 的中度到高度污染。艾德库湖的 Co、Cr 和 Cu 浓度最高（分别为 19.83、45.42 和 68.60 mg/kg）。沉积物中粘土的比例与 Co 和 Ni 在沉积物中的含量呈显著正相关（r = 0.7，P ≤ 0.001），这表明粘土的阳离子交换能力在金属的吸附和从水柱中去除方面起着重要作用。
