Geochemistry of the High Dam Lake sediments,south Egypt:implications for environmental significance

作     者：Mohamed Abdallah Gad DARWISH 

作者机构：Geology departmentFaculty of ScienceAswan University 

出 版 物：《International Journal of Sediment Research》 (国际泥沙研究(英文版))

年 卷 期：2013年第28卷第4期

页      面：544-559页

核心收录：

学科分类：08[工学] 081501[工学-水文学及水资源] 0815[工学-水利工程] 

主　　题：Geochemistry High Dam Lake sediments Environmental significance South Egypt 

摘      要：The goal of the present work is to perform a geochemical assessment of High Dam Lake bottom sediments for determining the fate,dispersion and levels of trace elements causing environmental pollution,and provided an access to their probable *** sediment samples were analyzed using ICP-MS for 20 elements;Ag,Ba,Cr,Cu,Ga,Hf,Mn,Pb,Rb,Sc,Sc,Sn,Sr,Ta Th Ti,T1,U,V and Zr,and their obtained data were treated using statistical,graphical and mapping *** results showed the data set of all analyzed elements affected by outliers and extreme values that caused deviation away from *** Wallis test revealed that median of some trace clement levels in Lake sediments,was not significantly different and other elements rejected the Null *** analyzed elements had high values of median and mean in sediments of Lake Nubia rather than Lake Nasser and their normalization gave the same results of calculated environment ***,Lake Nubia sediments possessed high combined EF levels of Th,Sc,Sn,Ag,Zr,Hf,Ta,Sr,U,Ti,V,Cr,and Mn,causing significant contamination,which was great potentially related to industrial,agricultural,urbanization and mining ***,combined EF of Se,Cu,Ga,Pb,Ba,Rb,and Tl,which are highly elevated in southern Lake Nasser sediments owing to their source are great possibly derived from Lake Nubia and geogenic *** decreasing distance towards the High Dam body,the contaminant elements were diminished due to reduction in the environmental factors and Sudanese pollution sources leading to the northern Lake Nasser considered to be less ***,the present study is an environmental alert for contaminated sediments that carried contaminants and considered the secondary source of pollution impact on ecosystem,and subsequently,their environmental risk on Human health.