Helali Mohamed Amine, Zaaboub Noureddine, Oueslati Walid, Added Ayed, Aleya Lotfi
Laboratoire des Ressources Minérales et Environnement, Département de Géologie, Faculté des Sciences de Tunis. Université Tunis-El Manar, 2092, Tunisia.
Laboratoire du Milieu Marin, Institut National des Sciences et Technologies de la Mer, 2025 Salammbô, Tunisia.
Mar Pollut Bull. 2016 Mar 15;104(1-2):171-81. doi: 10.1016/j.marpolbul.2016.01.041. Epub 2016 Feb 8.
A study of suspended particulate matter (SPM) fluxes along with their associated metals, organic matter and carbonates, was conducted off the Mejerda River outlet in May 2011 and in March and July 2012 at depths of 10, 20 and 40 m using sediment traps. SPM fluxes are more significant near the Mejerda outlet, especially in winter, but dissipate further offshore. Normalization reveals that the Mejerda is a major source of Pb, Zn, Cd, Cu, Ni, and Co, all of which are the result of human activities. In contrast, Fe, Mn and N are of authigenic origin. The enrichment factor shows that Pb, Zn and especially Cd are the most highly polluting metals off the Mejerda outlet. This confirms the trend observed on the shores of the Mejerda prodelta and is consistent with the type of mining activities conducted in the Mejerda catchment.
2011年5月以及2012年3月和7月，在迈杰尔达河河口外，利用沉积物捕集器在10米、20米和40米深度处对悬浮颗粒物（SPM）通量及其相关的金属、有机物和碳酸盐进行了研究。SPM通量在迈杰尔达河口附近更为显著，尤其是在冬季，但在离岸更远的地方会消散。归一化结果表明，迈杰尔达河是铅、锌、镉、铜、镍和钴的主要来源，所有这些都是人类活动的结果。相比之下，铁、锰和氮是自生来源。富集因子表明，铅、锌尤其是镉是迈杰尔达河口外污染最严重的金属。这证实了在迈杰尔达河三角洲前缘海岸观察到的趋势，并且与迈杰尔达河流域进行的采矿活动类型一致。
