Unité de recherche Eau, Pollution et Environnement (EPE), Département de chimie, faculté des sciences et techniques (FST), Université de Nouakchott Al-Aasriya (UNA), campus universitaire de Nouakchott, 880, Route de Nouadhibou, Nouakchott, Mauritania.
Département chimie microbiologie et suivi du milieu aquatique (DCM-SMA), office national d'inspection sanitaire des produits de la pêche et de l'aquaculture (ONISPA), 1416, Nouadhibou, Mauritania.
Environ Monit Assess. 2019 Jul 12;191(8):493. doi: 10.1007/s10661-019-7627-5.
Clarias gariepinus (African catfish) and Oreochromis niloticus (Tilapia fish) from the right North bank of the Senegal River in Mauritania (Rosso, Boghé, and Kaédi) were sampled during 1-year monitoring and tested for lead (Pb), cadmium (Cd), and mercury (Hg) levels. Fishing from the Senegal River is an essential source of food for the local population and these two species are the most common. Muscle presents higher Hg concentrations than liver and gills for both species. Gill Hg concentrations from Kaédi are higher than Boghé and Rosso for both species. The Cd levels measured in gills were low in the different locations and revealed high variation throughout the 1-year study. No significant differences were observed between concentrations of Cd in Clarias gariepinus and Oreochromis niloticus parts. Statistical treatment did not show a considerable variation of Pb concentration between the different parts, revealing lower levels in gills from Boghé than the ones from Kaédi and Rosso. The associated human health risk was calculated from the concentration levels using the target hazard quotient (THQ) approach. Even though all the THQ values and the hazard index were lower than 1 for the determined trace metals when the exposure frequency was not greater than three times a week, eating frequency in the studied locations sometimes is greater than five, thus posing a health risk, especially at Kaédi and Boghé.
从毛里塔尼亚塞内加尔河右岸（罗索、博赫和卡埃迪）采集的非洲鲶鱼（Clarias gariepinus）和罗非鱼（Oreochromis niloticus）在为期 1 年的监测中进行了铅（Pb）、镉（Cd）和汞（Hg）水平测试。从塞内加尔河捕鱼是当地居民的主要食物来源，这两个物种是最常见的。与肝脏和鳃相比，两种鱼类的肌肉中汞含量更高。卡埃迪的两种鱼类的鳃部汞浓度高于博赫和罗索。不同地点的鳃部 Cd 水平较低，整个 1 年的研究中变化较大。Clarias gariepinus 和 Oreochromis niloticus 各部位 Cd 浓度无显著差异。统计处理未显示不同部位 Pb 浓度有明显差异，表明 Boghé 的鳃部 Pb 浓度低于 Kaédi 和 Rosso。采用目标危害系数（THQ）方法，根据浓度水平计算人体健康风险。尽管对于确定的痕量金属，当暴露频率不超过每周三次时，所有 THQ 值和危害指数均低于 1，但在研究地点的食用频率有时超过五次，因此存在健康风险，尤其是在 Kaédi 和 Boghé。
