Textural and geochemical characteristics of off shore sediment of North Bay of Bengal:A statistical approach for marine metal pollution

作     者：Sanghamitra Palleyi Sabnam Banoo Rabi Narayan Kar Chitta Ranjan Panda 

作者机构：Environment & Sustainability DepartmentCSIR-Institute of Minerals and Materials Technology 

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：208-222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] 09[农学] 0903[农学-农业资源与环境] 0713[理学-生态学] 

基　　金：Space Application Center (Indian Space Research Organisation)  Ahmadabad 

主　　题：North Bay of Bengal Heavy metals Sequential extraction Quantitative index Factor analysis 

摘      要：Metal pollution study on sediments of North Bay of Bengal sediments presented in this paper is based on existing Lithostratigraphy of upstream,mineralogy and geochemical analysis of 42 sediment *** statistical analysis identifies the metal pollution as well as its apparent source in the off shore *** were analyzed for grain size,organic content and heavy metals(Fe,Mn,Cr,Cu,Ni,Pb,Cd,Zn and Co) using the sequential extraction method to evaluate geochemical processes and pollution *** an effort to surmise anthropogenic input,several approaches including classification by quantitative indexes such as enrichment factor,contamination factor,degree of pollution,pollution load index and geo accumulation index,were *** speciation results indicate high%of Cd in exchangeable fraction of Mahanadi transect sediments where as a considerable amount of oxidizable fraction of Cr was detected at *** indexes place North Bay of Bengal under moderately polluted zone due to high level of *** of metals to Fe indicated relatively high enrichment factors for Cd and *** analysis identified seven possible types of geochemical associations where sediment pH plays a major role for the heavy metal *** higher Cd concentration in exchangeable fraction as well as the higher EF for Cd and Cr present in sediment may pose a risk of secondary water pollution under slightest disturbance in the geo-chemistry of *** study with available data of near costal zones and upstream stratigraphy revealed that open cast mining,overburden dumping,mineral based industrial effluents were the major source of pollution for catchment area *** of Bengal is likely to face a serious threat of metal pollution with the present deposition rates unless rigorous pollution control norms are applied.