Holistic perilous index-based environmental appraisal of Metal(oid)s in the sole coral-bearing island of northeastern bay of Bengal

被引：10

作者：

Karmaker K.D. ^{[1
,2
]}

Hasan M. ^{[2
]}

Parvin A. ^{[1
]}

Hossain M.S. ^{[2
]}

Rahman M. ^{[3
]}

Shaikh M.A.A. ^{[1
,4
]}

Haque M.I.-M. ^{[5
]}

Hossain M.K. ^{[1
,6
]}

机构：

[1] BCSIR Laboratories Dhaka, Bangladesh Council of Scientific and Industrial Research (BCSIR), Dr Qudrat-i-Khuda Road, Dhanmondi, Dhaka

[2] Department of Oceanography, University of Dhaka, Dhaka

[3] Department of Geology, University of Dhaka, Dhaka

[4] Department of Chemistry, University of Dhaka, Dhaka

[5] Department of Fisharies, University of Dhaka, Dhaka

[6] Cental Analytical Research Facilities (CARF), Bangladesh Council of Scientific and Industrial Research (BCSIR), Dr Qudrat-i-Khuda Road, Dhanmondi, Dhaka

来源：

Chemosphere | 2024年 / 359卷

关键词：

Environmental evaluation; Hazards index; Human health; Island; Trace metals;

D O I：

10.1016/j.chemosphere.2024.142245

中图分类号：

学科分类号：

摘要：

This study aimed to evaluate the concentration, distribution, along with the environmental and human health impact of eight heavy metals—Pb, Cr, Cu, Cd, Zn, Mn, Ni, and As—on St. Martin's Island in the northeastern Bay of Bengal, and in doing so to help implement new legislations to protect the island. Focusing on the island's significance as a tourist destination, with seafood being a prominent dietary component, three sample types (sediment, seawater, and crustaceans) were selected for a comprehensive assessment, considering seasonal variations. Concentration of metals was observed to be lower than the established standards in sediment samples, but in seawater samples, Pb, Cr, Cd and Zn were higher than US-EPA values for natural marine water. The metals displayed a decreasing trend of Zn > Ni > Pb > Cu > Mn > As > Cd > Cr in crustacean samples for both seasons. Crustacean samples displayed higher metal concentrations in winter than in monsoon. Pb exceeded the maximum allowable limit for crustaceans with a concentration of about 3 and 4 mg kg−1 in monsoon and winter respectively; being more than 6–8 times the standard for Bangladesh which is only about 0.5 mg kg−1. Health indices displayed that although adults may suffer less from carcinogenic/non-carcinogenic health effects, the risks are far greater for children. For both age groups, As and Ni displayed possibilities of developing cancer. Principal Component Analysis (PCA)shed light on the sources of metals and showed that most of them were from anthropogenic sources. Overall, this study found that the quality of the environment of the island was better in comparison to previous studies made before the pandemic, and so, if the trend continues, it may lead to a better environment for the organisms around the island and help to keep the negative physiological impacts from the consumption of these organisms to a minimal. © 2024 Elsevier Ltd

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