期刊名称：Research Journal of Environmental and Earth Sciences
印刷版ISSN：2041-0484
电子版ISSN：2041-0492
出版年度：2011
卷号：3
期号：6
页码：772-781
出版社：Maxwell Science Publications
摘要：The objective of this work is to assess the levels of trace elements and the extent of pollution in the surface water and sediments from in the Densu delta wetland using INAA, PLI and the help of statistical tools like PCA and CA establish their common sources. Eight samples of surface water, eight samples of sediments were taken for elemental analysis. The samples were analyzed for physical and chemical parameters, as well as trace elements (Al, Cu, V, Mn, Cd, Zn, Cr, Fe and As). The results showed that the surface water in the area can be described as slightly alkaline with pH of 7.5 and high conductivities of 150-3412:S/cm with corresponding TDS of 80-1750 mg/L. Statistical analyses such as Principal Component Analysis (PCA) and Cluster Analysis (CA) were used to identify trace elements pollution in the wetland area. Results from CA and PCA suggest positive relationships between the two analyses. Trace elements were identified as originating from a common source in all the analyses. The PLI calculated for sediments in the study area were found to be below the index limit of 1. This shows that the surface waters are not yet polluted with respect to trace elements but the originality of the ecosystem is threatened.
关键词：Densu delta wetland ; hydrochemistry ; INAA ; pollution load index ; principal component sediments ; surface water ; Densu Delta Wetland
