Department of Oceanography, Faculty of Science, Alexandria University, 21511 Alexandria, Egypt.
Department of Oceanography, Faculty of Science, Alexandria University, 21511 Alexandria, Egypt.
Mar Pollut Bull. 2021 Jun;167:112290. doi: 10.1016/j.marpolbul.2021.112290. Epub 2021 Mar 31.
The Mediterranean coastal area of the Nile Delta is socio-economically vital, however, it is under significant environmental stress due to pollution from land-based activities. The study investigates the temporal variations of trace metals to assess the development of the anthropogenic pollution status in the coastal sediments. The average concentrations, the enrichment factor, and the geoaccumulation index revealed that Cr, V, Ni, and Co are pollutants of concern. Trace metals are particularly accumulating in the sediments further offshore and in the middle and eastern sectors of the Nile Delta coast. The temporal patterns of the pollution load index (PLI) along the Nile Delta coastal indicate that pollution hotspots are increasingly exposed to trace metals pollution over time. This is linked to discharges from anthropogenic land-based activities and controlled by sedimentological factors. A conceptual model for the accumulation of trace metals in sediments is proposed based on this study.
尼罗河三角洲的地中海沿海地区在社会经济上至关重要，但由于陆地活动造成的污染，它面临着巨大的环境压力。本研究调查了痕量金属的时间变化，以评估沿海沉积物中人为污染状况的发展。平均浓度、富集因子和地质累积指数表明，Cr、V、Ni 和 Co 是令人关注的污染物。痕量金属特别在离海岸更远的地方以及在尼罗河三角洲海岸的中部和东部地区的沉积物中积累。尼罗河三角洲沿海地区污染负荷指数 (PLI) 的时间模式表明，随着时间的推移，污染热点越来越容易受到痕量金属污染。这与人为陆地活动的排放有关，并受沉积学因素的控制。本研究提出了一个基于该研究的沉积物中痕量金属积累的概念模型。
