Distribution, sources and chemical screening-level assessment of toxic metals in the northern Bay of Bengal, Bangladesh.
The present study aims to examine the distribution, sources and potential risks of toxic metals in the northern Bay of Bengal, Bangladesh. We found Cu, Pb, Zn and Hg exhibited similar spatial distribution pattern. Influenced by the Ganges-Brahmaputra River and the Karnafuli River, there were higher concentrations of these metals associated with the finer sediment and higher TOC in the northeastern portion of the study area. Moreover, coal transportation was assumed to account for the distinctive spatial distribution of As with higher concentration down the Port of Chittagong in the eastern boundary. Chemical-screening level assessment demonstrated the majority of the metals exceeded the threshold effect values, indicating certain possibility of adverse effect. The concentrations of Ni were higher than the possible hazardous values, suggesting high possibility of harmful consequences. The uncontaminated sediments mainly distributed in northwestern and the central portions affected by the delta erosion and marine transported sediments.
['Liu|Shengfa|S|', 'Wu|Bin|B|', 'Seddique|Ashraf Ali|AA|', 'Zhang|Hui|H|', 'Zhu|Aimei|A|', 'Liu|Jianguo|J|', 'Shi|Xuefa|X|']
D001459:Bangladesh D061006:Bays D002681:China D004784:Environmental Monitoring D019015:Geologic Sediments D019216:Metals, Heavy D018570:Risk Assessment D014874:Water Pollutants, Chemical
Sources Toxic metals Bay of Bengal Sediment Risk assessment