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Health risk assessment by toxic metals in little egrets (Egretta garzetta) and food chain contaminations
Saudi Journal of Biological Sciences Pub Date : 2021-09-07 , DOI: 10.1016/j.sjbs.2021.08.106
Madiha Rani 1 , Rizwan Ullah 1 , Mona S Alwahibi 2 , Mohamed S Elshikh 2 , Mohamed Ragab AbdelGawwad 3 , Adeel Mahmood 4
Affiliation  

This study analysed heavy metals from little egret (Egretta garzetta). Egret’s Eggs, egg shells, food (fish and insects), blood, meat samples (thigh, liver, and chest), water, soil and sediments samples were collected from the two selected sites of the study area. Samples were analysed on flame atomic absorption spectrometer after acid digestion. Detected metals were found almost inline of concentrations when compared with the both sites. Among detected metals Mn was found higher in concentration (µg/g) i.e. 18.509 followed by Zn i.e. 9.383, Ni, Cu, Pb and Cd. Sediment exhibited higher levels (µg/g) of metals (25.061) followed by the meat (19.044) egrets food (18.825), excreta (16.26), blood serums (4.577), eggs (3.626) and water samples (2.432).The level of metals in sediments of the study are showed environmental concerns. Health risks were also investigated that were compared to guidelines of WHO and FAO threshold limits. It was found a marginal health risk to life through detected metals. This study revealed that little egret are good bio-indicator for the screening and investigation of contaminates presence in the environment.



中文翻译:

小白鹭 (Egretta garzetta) 和食物链污染中有毒金属的健康风险评估

本研究分析了小白鹭(Egretta garzetta)中的重金属)。从研究区域的两个选定地点收集白鹭的蛋、蛋壳、食物(鱼和昆虫)、血液、肉类样本(大腿、肝脏和胸部)、水、土壤和沉积物样本。酸消解后的样品在火焰原子吸收光谱仪上进行分析。与这两个地点相比,检测到的金属几乎与浓度一致。在检测到的金属中,Mn 的浓度较高(µg/g),即 18.509,其次是 Zn,即 9.383,Ni、Cu、Pb 和 Cd。沉积物中的金属含量较高 (µg/g) (25.061),其次是肉类 (19.044)、白鹭食品 (18.825)、排泄物 (16.26)、血清 (4.577)、鸡蛋 (3.626) 和水样 (2.432)。研究表明沉积物中金属含量水平对环境存在担忧。还对健康风险进行了调查,并与世卫组织和粮农组织的阈值限制准则进行了比较。通过检测到的金属,人们发现它对生命的健康风险很小。这项研究表明,小白鹭是筛选和调查环境中污染物存在的良好生物指标。

更新日期:2021-09-07
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