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Trace Metals Contamination in Riverine Captured Fish and Prawn of Bangladesh and Associated Health Risk
Exposure and Health ( IF 6.7 ) Pub Date : 2020-09-30 , DOI: 10.1007/s12403-020-00378-1
Md. Khalid Hasan , Abrar Shahriar , Nazmul Hossain , Ibrahim Khulilullah Shovon , Anwar Hossain , Yeasmin Nahar Jolly , Bilkis Ara Begum

Trace metals contamination is ubiquitous in the riverine environments of Bangladesh. Trace metals contamination is increasing rapidly in Dhaleshwari River due to rapid urbanization and industrialization along the riverbank, especially after the establishment of the Tannery Industrial Estate at Savar in Dhaka District. As a result, aquatic ecosystems, including fish and prawn species of the river, are contaminated by various trace and toxic metals. We examined the concentrations of 10 trace metals (Cr, Fe, Zn, Mn, Co, Ni, Cu, As, Hg, and Pb) in 20 different fish and prawn species (n = 41) which are commonly found in the Dhaleshwari River using energy-dispersive X-ray fluorescence (EDXRF) method. The potential human health risks (noncarcinogenic and carcinogenic) of the trace metals were calculated by using Target Hazard Quotient (THQ), Hazard Index (HI), and Target Cancer Risk (TR) indices. The mean concentration (mg/kg; ww) of the trace metals in analyzed riverine fish and prawn species was in the order of Fe > Zn > Cu > Cr > Mn > Co > Hg > Ni > Pb > As. The highest concentration of Fe (74.67 mg/kg) and Cr (4.64 mg/kg) was found in Mystus bleekeri, whereas Zn (38.89 mg/kg) and Cu (17.47 mg/kg) were found in Rohtee cotio and Glossogobius guiris, respectively. The target hazard quotient (THQ) values were less than 1 (no detrimental health effects) for all the specific metals in most of the species except M. bleekeri (1.61), G. guiris (1.29), Corica soborna (1.28) for Cr, and Macrobrachium malcolmsonii (1.19) for Hg indicate that the noncarcinogenic health risk to humans by consuming those species was relatively low. However, nine out of twenty species found higher Hazard Index (HI) values than the recommended value (HI = 1), indicating that regular consumption of these fishes may have considerable harmful effects on human health. The highest HI value (2.85) was found in M. bleekeri. Moreover, target cancer risk (TR) values showed that frequent intake of some species for prolonged periods might pose a carcinogenic risk due to Cr and Ni contamination as they were higher than the maximum accepted value of 10−4. Based on the present study, it is imperative to take an urgent initiative to control or prevent the trace metals contamination in the Dhaleshwari River and minimize the human health risks associated with the consumption of fish and prawn species in this river in Bangladesh.



中文翻译:

孟加拉国河流捕捞的鱼和虾中的痕量金属污染及相关的健康风险

孟加拉国的河流环境中普遍存在痕量金属污染。由于沿河岸的快速城市化和工业化,特别是在达卡区萨瓦尔的制革工业区建立之后,达勒什瓦里河中的痕量金属污染迅速增加。结果,包括河流中的鱼类和虾类在内的水生生态系统受到各种微量和有毒金属的污染。我们检查了20种不同鱼类和虾类中n的10种微量金属(Cr,Fe,Zn,Mn,Co,Ni,Cu,As,Hg和Pb)的浓度(n = 41),通常在Dhaleshwari河中使用能量色散X射线荧光(EDXRF)方法发现。痕量金属的潜在人类健康风险(非致癌性和致癌性)通过使用目标危害商(THQ),危害指数(HI)和目标癌风险(TR)指数进行计算。被分析的河流鱼类和对虾物种中痕量金属的平均浓度(mg / kg; ww)的顺序为:Fe> Zn> Cu> Cr> Mn> Co> Hg> Ni> Pb> As。在Mystus bleekeri中发现最高浓度的Fe(74.67 mg / kg)和Cr(4.64 mg / kg),而在Rohtee cotioGlossogobius guiris中发现Zn(38.89 mg / kg)和Cu(17.47 mg / kg)分别。除bleekeri(1.61),G。guiris(1.29),Corica soborna(1.28)对Cr以外,大多数物种中所有特定金属的目标危险商(THQ)值均小于1(无有害健康影响),H。Macrobrachium malcolmsonii(1.19)中的Hg表明,食用这些物种对人类的非致癌健康风险相对较低。但是,二十种中的九种发现其危害指数(HI)值高于建议值(HI = 1),这表明定期食用这些鱼类可能对人体健康产生相当大的有害影响。bleekeri的最高HI值(2.85) 。此外,目标癌症风险(TR)值表明,长时间摄入某些物种可能会由于Cr和Ni污染而引起致癌风险,因为它们高于最大可接受值10 -4。根据目前的研究,迫切需要采取紧急行动,以控制或预防Dhaleshwari河中的痕量金属污染,并最大程度地减少与孟加拉国这条河中鱼类和虾类消费相关的人类健康风险。

更新日期:2020-10-02
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