Anthropogenic and natural contribution of potentially toxic elements in southwestern Ganges-Brahmaputra-Meghna delta, Bangladesh.

Autor: Haque MM; Department of Geology and Mining, University of Rajshahi, Rajshahi 6205, Bangladesh. Electronic address: md_hq@ru.ac.bd., Reza AHMS; Department of Geology and Mining, University of Rajshahi, Rajshahi 6205, Bangladesh., Hoyanagi K; Department of Geology, Institute of Science, Shinshu University, 3-1-1 Asahi, Matsumoto 390-8621, Japan.
Jazyk: angličtina
Zdroj: Marine pollution bulletin [Mar Pollut Bull] 2023 Jul; Vol. 192, pp. 115103. Date of Electronic Publication: 2023 Jun 03.
DOI: 10.1016/j.marpolbul.2023.115103
Abstrakt: Elemental composition, multivariate statistical analyses with the absolute principal component score-multiple linear regression (APCS-MLR) model, and different pollution indices in Upper and Lower Southwestern Ganges-Brahmaputra-Meghna (GBM) delta sediments were studied to characterize pollution, ecological risk and quantify potential toxic element sources of the area. Toxic metals concentrations were higher in Lower Delta and individual pollution indices showed Upper Delta was moderately polluted by arsenic, chromium, cobalt, copper and lead, and Lower Delta was moderately-strongly polluted by the same metals. Synergistic indices include Potential Ecological, Toxic, Nemerow, and Pollution Risk indices in Upper and Lower Delta sediment ranged from 47.17-128.07, 2.03-12.19, 29.92-65.42, 0.28-1.62, and 69.17-246.90, 8.00-13.47, 20.53-152.92, 1.18-1.58, indicated low and moderate risk pollution, respectively. Statistical models represent the metals dominantly originated from nature for Upper Delta, and both natural and anthropogenic activities contributed to Lower Delta sediment. The study found that the modern deposit in Lower Delta became more contaminated and thus enhanced ecological risk.
Competing Interests: Declaration of competing interest All relevant data used for the research described in this article are included in the article. The author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article. The authors declare that this manuscript is original, has not been published before, and is not currently being considered for publication elsewhere.
(Copyright © 2023 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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