期刊
MARINE POLLUTION BULLETIN
卷 179, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2022.113688
关键词
Metal pollution; Grain size; Pollution load index; Pearson correlation; Bay of Bengal
资金
- Ministry of Science and Technology, People's Republic of Bangladesh [39.00.0000.012.20.009.20-66]
- Bangladesh Council of Scientific and Industrial Research (BCSIR)
- Institute of Mining, Mineralogy and Metallurgy
Ten surficial sediment samples were collected and analyzed for heavy metals before the monsoon season. The results showed that the surficial sediment of the Island was low to moderately contaminated by Cd and Cu.
Ten surficial sediment samples (up to a depth of 3 cm) were randomly collected during the pre-monsoon and analyzed for nine heavy metals using an atomic absorption spectrophotometer (AAS) to assess the distribution, contamination levels, and potential sources of heavy metals. The particle size distribution of the sediments was also investigated using a laser particle size analyzer. The mean concentration (mg/kg) of the analyzed metals followed a decreasing order of Fe (4706.24) > Mn (95.20) > Cu (36.97) > Zn (20.65) > Ni (9.26) > Cr (7.20) > Pb (5.63) > Co (5.52) > Cd (0.29). Surficial sediment of the Island was low to moderately contaminated by Cd and, to a laser extent by Cu in terms of enrichment factor (EF), geo-accumulation index (Igeo), and contamination factor. Ecologically, the Nijhum Dweep area was at low to moderate risk, where Cd was the most potential ecological risk factor. The Pearson correlation analysis revealed a significant positive correlation among Cr, Pb, Zn, Mn, Cd, Fe, Co, Ni, and silt particles, whereas a negative correlation with sand particles. No correlation was found with Cu and other metals except clay particles.
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