Department of Environmental Science and Management, North South University, Bashundhara, Dhaka, 1229, Bangladesh.
Department of Fisheries and Marine Science, Faculty of Science, Noakhali Science and Technology University, Noakhali, Bangladesh.
Environ Monit Assess. 2024 Nov 7;196(12):1175. doi: 10.1007/s10661-024-13347-x.
Heavy metals (HMs) are ubiquitous in terrestrial and aquatic environments due to unplanned industrial waste discharge, the release of untreated wastewater, and improper mining activities. In particular, the concentrations of HMs are found to be higher in aquatic environments. As a result, the aquatic biota was heavily affected by HM contamination. This critical review aims to understand the sources and toxicity of HMs in commercial fish species, explore their ecological exchange, and examine the related human health challenges in Bangladesh. A modified PRISMA review technique is used in this paper to analyze the current status and research limitations of HM studies in Bangladesh fish species and their toxicity within aquatic food webs. Briefly, we searched several keywords to explore the research trend of HM concentrations and toxicity in fish species. Furthermore, potential toxicity and risk assessment of HMs through the aquatic food chain in Bangladesh were explored. On the other hand, a cross-tabulation approach was used to process the toxicity findings of HMs. Previous studies indicate that fish species can possess comparatively higher HMs than river water due to ecological exchange factors, including bioaccumulation and biotransformation. This review focuses on Bangladesh, highlighting areas for improvements and the need for further study to achieve a transparent understanding of HM deposition in fish species and the sustainable management of aquatic food chain toxicity.
重金属（HMs）由于计划外的工业废物排放、未经处理的废水排放和不当的采矿活动，在陆地和水生环境中普遍存在。特别是，在水生环境中发现 HMs 的浓度更高。因此，水生物群受到 HM 污染的严重影响。本批判性评论旨在了解商业鱼类中 HMs 的来源和毒性，探讨其在生态系统中的交换，并研究孟加拉国相关的人类健康挑战。本文采用改良的 PRISMA 审查技术，分析孟加拉国鱼类物种中 HM 研究的现状和研究限制及其在水生食物网中的毒性。简而言之，我们搜索了几个关键词来探索鱼类物种中 HM 浓度和毒性的研究趋势。此外，还探讨了通过孟加拉国的水生食物链潜在的毒性和风险评估。另一方面，采用交叉制表方法处理 HMs 的毒性发现。先前的研究表明，由于包括生物积累和生物转化在内的生态交换因素，鱼类物种可能比河水具有更高的 HMs。本评论重点关注孟加拉国，突出了改进的领域和进一步研究的必要性，以实现对鱼类物种中 HM 沉积和水生食物链毒性的可持续管理的透明理解。
