Mahdi Ahmed Moussa, Doumenq Pierre, Awaleh Mohamed Osman, Syakti Agung Dhamar, Asia Laurence, Chiron Serge
Institut des Sciences de la Terre, Centre d'Etude et de Recherche de Djibouti, Route de l'aéroport BP 486, Djibouti, Republic of Djibouti.
Laboratoire de Chimie de l'environnement, Equipe Micropolluants Organique, FRE-CNRS 3416, Europôle de l'Arbois-Bátiment Villemin BP 80, Aix en Provence Cedex 4, France.
Mar Pollut Bull. 2017 Jul 15;120(1-2):340-346. doi: 10.1016/j.marpolbul.2017.05.055. Epub 2017 May 24.
Selected heavy metals and polycyclic aromatic hydrocarbons (PAHs) were determined in marine sediment from 28 sites Djibouti city. The concentrations of trace elements varied from 0 to 288.1mg/kg with relative abundance of trace metals in sediments was in the order of Zn>Cu>Ni>Cr>Co>Pb>Cd. Zn, Cu and Ni exceeded consensus based sediment quality guideline values 7, 14, 15 sites respectively. Enrichment factor and pollution load index showed relatively low to moderate contamination. The concentrations of total 16 PAHs varied widely depending on the sample location and ranged from 2.65 to 3760.11ng·g, with the mean concentration value of 387.87ng·g. Compositions and relative abundance of individual PAH using molecular diagnostic ratio using congener's m/z 178 and 202 indicated pyrolytic origin and reflecting a petroleum combustion, grass/wood and coal combustion and a petrogenic source. This study represents the first pollution baseline and a reference for future studies in Djibouti.
对吉布提市28个地点的海洋沉积物中的特定重金属和多环芳烃（PAHs）进行了测定。微量元素浓度在0至288.1mg/kg之间，沉积物中痕量金属的相对丰度顺序为Zn>Cu>Ni>Cr>Co>Pb>Cd。Zn、Cu和Ni分别在7个、14个和15个地点超过了基于共识的沉积物质量指导值。富集因子和污染负荷指数显示污染程度相对较低至中等。16种PAHs的总浓度因样品位置而异，范围为2.65至3760.11ng·g，平均浓度值为387.87ng·g。使用同系物m/z 178和202的分子诊断比率对单个PAH的组成和相对丰度进行分析，表明其具有热解起源，反映了石油燃烧、草/木和煤炭燃烧以及成岩来源。本研究代表了吉布提的首个污染基线，为未来的研究提供了参考。
