Distribution,source identification and risk assessment of selected metals in sediments from freshwater lake

作     者：Javed Iqbal Munir H.Shah Nazia Shaheen 

作者机构：Department of ChemistryQuaid-i-Azam University 

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

年 卷 期：2015年第30卷第3期

页      面：241-249页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 07[理学] 08[工学] 0713[理学-生态学] 

基　　金：Quaid-i-Azam University  QAU 

主　　题：Sediment Metal Risk assessment Multivariate analysis AAS Pakistan 

摘      要：This study is based on the assessment of distribution,source apportionment and risk assessment of selected metals in freshly deposited sediments from freshwater lake,*** sediments were collected and processed to assess Ca（NO3）2-extractable and acid-extractable levels of the metals in the sediments using flame atomic absorption *** factors（EF）,geoaccumulation indices(Igeo),contamination factors（C_f） and degree of contamination(Cdeg) were computed to estimate the degree of *** potential ecological risk was assessed using sediment quality guidelines and mean-ERM-quotient（m-ERM-Q）.On the average basis,acid-extractable metals followed the decreasing concentration order:CaMgFeKMnNaSrZnPbCrCoCu-LiCd,whereas,the Ca（NO3）2-extractable levels were:NaPhCdSrCoCrKMg-CuZnLiCaFe*** highest Ca（NO3）2extractable concentrations were observed for Na,Pb and Cd,while that of Ca,Fe and Mn were the *** showed very high and extremely high enrichment of Pb and Cd,respectively,while Ca,Co,Cr,Li,Mg,Mn,Sr and Zn manifested moderate enrichment:the Igeoresults revealed moderate to strong and strong to extreme pollution for Pb and Cd,respectively;and the C_f study showed moderate,considerable and very high contamination by Co,Pb and Cd,*** Cdegrevealed very high degree of contamination in the sediments as a *** component analysis（PCA） and cluster analysis（CA） showed considerable anthropogenic contributions of Cd,Pb,Co,Mn,K,Zn and Li in the *** levels of Cd and Pb exceeded ERL values,manifesting occasional adverse biological effects to the dwelling ***,the mERM-Q study manifested 21%probability of toxicity in the sediments.