Graduate School of Environment and Information Sciences, Yokohama National University, 79-7 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan; Department of Soil Science, Patuakhali Science and Technology University, Dumki, Patuakhali 8602, Bangladesh.
Department of Oceanography, University of Dhaka, Dhaka 1000, Bangladesh.
Environ Toxicol Pharmacol. 2015 Jan;39(1):347-57. doi: 10.1016/j.etap.2014.12.009. Epub 2014 Dec 22.
Levels of six metals i.e. chromium (Cr), nickel (Ni), copper (Cu), arsenic (As), cadmium (Cd) and lead (Pb) in three fish species (Channa punctatus, Heteropneustes fossilis and Trichogaster fasciata) from three urban rivers in Bangladesh were measured. Concentrations of Cr, Ni, Cu, As, Cd and Pb in fish species were 0.75-4.8, 0.14-3.1, 1.1-7.2, 0.091-0.53, 0.007-0.13, and 0.052-2.7mg/kg ww, respectively. The analyzed metals were significantly different between species and seasons (p<0.05). The target hazard quotients (THQs) and carcinogenic risk (CR) for individual metal showed that As and Pb in muscle was particularly hazardous and potential risk for the low, medium and high fish consumer in Bangladesh. Some of the trace metals' concentrations are higher than the recommended value, which suggest that the water and fish of these rivers are not completely safe for human health.
本研究测定了孟加拉国三条城市河流中的三种鱼类（斑点叉尾鮰、纹胸𬶐和泰国斗鱼）中六种金属（铬[Cr]、镍[Ni]、铜[Cu]、砷[As]、镉[Cd]和铅[Pb]）的含量。鱼体内 Cr、Ni、Cu、As、Cd 和 Pb 的浓度分别为 0.75-4.8、0.14-3.1、1.1-7.2、0.091-0.53、0.007-0.13 和 0.052-2.7mg/kg 湿重。分析的金属在物种和季节之间存在显著差异（p<0.05）。对于单个金属的目标危害系数（THQ）和致癌风险（CR）表明，肌肉中的 As 和 Pb 对孟加拉国低、中、高鱼类消费者具有特别危害性和潜在风险。一些痕量金属的浓度高于推荐值，这表明这些河流的水和鱼类对人类健康并非完全安全。
