Mna Haïfa Ben, Oueslati Walid, Helali Mohamed Amine, Zaaboub Noureddine, Added Ayed, Aleya Lotfi
Laboratoire des Ressources Minérales et Environnement, Département de Géologie, Faculté des Sciences de Tunis, Université Tunis-El Manar, 2092, Tunis, Tunisia.
Laboratoire du Milieu Marin, Institut National des Sciences et Technologies de la Mer, 2025, Salammbô, Tunisia.
Environ Monit Assess. 2017 Jul;189(7):356. doi: 10.1007/s10661-017-6073-5. Epub 2017 Jun 27.
To examine the state of pollution of Bizerte Lagoon which is exposed to intense anthropogenic pressure, two sediment cores were taken at two sites, one undergoes the dual effects of both marine waters arriving from the Mediterranean Sea through the Channel, and also of freshwater from the Tinja River; the other core is located at the center of the lagoon where water depth is maximal (12 m). Heavy metal concentrations in the two cores were assessed, with calculated enrichment factors and geo-accumulation indexes. Core sediments were also studied for chemical speciation and their monosulfide contents were measured. Results from enrichment factors and geo-accumulation indexes show an accumulation of Cd, Zn, Cr, and Pb, while chemical speciation revealed a risk only from Cd and Mn. Comparison of sequential extraction values with those of acid volatile sulfides revealed that non-toxic effects may be caused by any of the studied metals in the sediment.
为了研究遭受强烈人为压力的比塞大泻湖的污染状况，在两个地点采集了两个沉积物岩芯，其中一个地点受到来自地中海经海峡流入的海水以及廷贾河淡水的双重影响；另一个岩芯位于泻湖中心，此处水深最大（12米）。评估了两个岩芯中的重金属浓度，并计算了富集因子和地累积指数。还研究了岩芯沉积物的化学形态，并测量了其单硫化物含量。富集因子和地累积指数的结果表明镉、锌、铬和铅出现了累积，而化学形态分析显示仅镉和锰存在风险。将连续萃取值与酸挥发性硫化物的值进行比较后发现，沉积物中所研究的任何一种金属都可能产生无毒影响。
