Marine environmental pollution is a longstanding global problem and has a particular impact on the Bay of Bengal. Effluent from different sources directly enters rivers of the region and eventually flows into the Bay of Bengal. This effluent may contain radioactive materials and trace metals and pose a serious threat to the coastal environment, in addition to aquatic ecosystems. Using gamma spectrometry and atomic absorption spectrometry, a comprehensive study was carried out on the radioactivity (²²⁶Ra, ²³²Th, ⁴⁰K, and ¹³⁷Cs) and trace metal (Cd, Pb, Zn, Cu, Ni, Fe, Mn, and Cr) concentrations, respectively, in fish and crustacean species collected from the coastal belt of the Bay of Bengal (Chattogram, Bangladesh). The analysis showed a noticeable increment in the levels of different radioactive pollutants in the marine samples, although the consumption of the studied fish and crustacean species should be considered safe for human health. Anthropogenic radionuclide (¹³⁷Cs) was not detected in any sample. Furthermore, the metal concentrations of a small number of trace elements (Pb, Cd, Cr) were found to be higher in most of the samples, which indicates aquatic fauna are subject to pollution. The estimated daily intake (EDI), target hazard quotient (THQ), hazard index (HI), and target cancer risk (TR) were calculated and compared with the permissible safety limits. It was found that consuming the seafood from the Bay of Bengal may cause adverse health impacts if consumption and/or means of pollution are not controlled.

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评估孟加拉湾海洋食用鱼类和甲壳类动物中放射性和微量金属的污染水平及其风险（色谱图，孟加拉国）

海洋环境污染是一个长期存在的全球性问题，对孟加拉湾具有特别的影响。来自不同来源的废水直接进入该地区的河流，最终流入孟加拉湾。除了水生生态系统之外，该废水还可能包含放射性物质和微量金属，并对沿海环境构成严重威胁。使用伽马能谱和原子吸收能谱对放射性（²²⁶ Ra，²³² Th，⁴⁰ K和¹³⁷从孟加拉湾沿海地带收集的鱼类和甲壳类物种中的Cs和痕量金属（Cd，Pb，Zn，Cu，Ni，Fe，Mn和Cr）的浓度（色谱图，孟加拉国）。分析表明，海洋样品中各种放射性污染物的含量显着增加，尽管食用被研究的鱼类和甲壳类动物对人类健康是安全的。人为放射性核素（¹³⁷在任何样品中均未检测到Cs）。此外，在大多数样品中发现少量微量元素（Pb，Cd，Cr）的金属浓度较高，这表明水生动物受到污染。计算估计的每日摄入量（EDI），目标危险商（THQ），危险指数（HI）和目标癌症风险（TR），并将其与允许的安全限值进行比较。发现如果不控制消费和/或污染手段，从孟加拉湾消费海鲜可能会对健康造成不利影响。