Heavy metal contamination of freshwater prawn (Macrobrachium rosenbergii) and prawn feed in Bangladesh: A market-based study to highlight probable health risks
Heavy metal contamination of freshwater prawn (Macrobrachium rosenbergii) and prawn feed in Bangladesh: A market-based study to highlight probable health risks
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DOI：
10.1016/j.chemosphere.2016.11.163
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发表时间：
2017-03-01
期刊：
影响因子：
8.8
通讯作者：
Jolly, Y. N.
中科院分区：
文献类型：
--
作者：
Islam, G. M. Rabiul;Habib, Mohammad Ruzlan;Jolly, Y. N.
对人类接触重金属的饮食风险进行评估是很重要的，因为它是主要的接触来源。本研究旨在估计污染程度，并评估对虾食物链中可能的健康风险。对虾饲料中各金属元素的含量顺序为：Hg > Co > Pb b> Cd，其中Co含量最高，Cd含量最低。样品中检测到微量的As和Cr。成人的铅、镉、汞和钴的目标危险商数为100亿美元，儿童的Co和汞的目标危险商数同样很高，表明饮食暴露会带来重大健康风险。所有对虾样本的铅和汞含量分别比最高可接受水平高出9倍和14倍(0.5 mg kg(-1)；世卫组织/粮农组织)。由于暴露于Co的水平非常高，人类健康风险相当惊人。在供人食用的对虾样本中，来自巴格哈特（Bagerhat）的样本危害指数最高（肉3.25，皮3.26），其次是来自Satkhira（肉2.84，皮3.10）和达卡市公司（肉2.81，皮3.42）；这表明食用来自孟加拉国东南部的对虾存在潜在风险。这一问题尤其严重，因为该地区占该国对虾生产和出口的大部分。(C) 2016 Elsevier Ltd.版权所有。
An assessment of the dietary risk of heavy metal exposure to humans is important since it is the main source of exposure. This study aimed to estimate the degree of contamination and assess the probable health risk in the prawn food chain. In prawn feed, the concentrations of metals were detected in the following order: Hg > Co > Pb > Cd. The concentrations of heavy metals in prawn were the highest for Co and lowest for Cd. Trace amounts of As and Cr were detected in the analyzed sample. Target hazard quotients for heavy metals for adults were >1 for Pb, Cd, Hg, and Co, and for children, the same were high for Co and Hg, indicating significant health risks upon dietary exposure. All the prawn samples contained nine-fold and fourteen-fold higher concentrations than the maximum acceptable levels for Pb and Hg, respectively (0.5 mg kg(-1); WHO/FAO). Human health risk due to the Co exposure is quite alarming as the level of exposure was found to be very high. In the prawn samples intended for human consumption, the hazard index (HI) was highest in the samples obtained from Bagerhat (3.25 in flesh and 3.26 in skin), followed by the samples obtained from Satkhira (2.84 in flesh and 3.10 in skin) and Dhaka City Corporation (2.81 in flesh and 3.42 in Skin); this indicates a potential risk of prawn consumption obtained from Southeast Bangladesh. This is particularly problematic as this area accounts for the majority of prawn production and export of the country. (C) 2016 Elsevier Ltd. All rights reserved.