Heavy metals concentrations in the offal, gill, muscle and liver of a freshwater mudfish ( Parachanna obscura ) from Ogba River, Benin city, Nigeria
Heavy metals concentrations in the offal, gill, muscle and liver of a freshwater mudfish ( Parachanna obscura ) from Ogba River, Benin city, Nigeria
复制标题
尼日利亚贝宁市奥格巴河淡水泥鱼 (Parachanna obscura) 的内脏、鳃、肌肉和肝脏中的重金属浓度
DOI：
10.4314/ajb.v6i22.58160
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
E. Obasohan
中科院分区：
文献类型：
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作者：
E. Obasohan
本研究于2005年1月至12月对尼日利亚贝宁市奥格巴河一种具有重要商业价值的泥鱼（Parachanna obscura）的鳃、内脏、肌肉和肝脏中的Cu、Mn、Zn、Cd、Cr、Ni和Pb浓度进行了评估和监测。在这条河的水中也检测到了同样的金属。结果表明，各组织（内脏、鳃、肌肉和肝脏）中金属的浓度均高于水体中金属的浓度，具有生物蓄积性。水中所有金属的浓度均低于WHO和FEPA的建议限值，表明Ogba河的水适合饮用，但所有鱼组织中Cu、Mn、Cr、Ni和Pb的浓度都超过了这些限值，表明Ogba河的鱼就这些金属而言不适合人类食用。因此，建议密切监测Ogba河的金属污染和鱼类消费情况，以期尽量减少对依赖该河提供水和鱼类的人口的健康风险。
This study assessed and monitored the concentrations of Cu, Mn, Zn, Cd, Cr, Ni and Pb in the gills, offal, muscle and liver of a commercially important mudfish (Parachanna obscura) from Ogba River, Benin City, Nigeria between January and December, 2005. The same metals were also determined in the water of the river. The results revealed that the concentrations of all the metals in the tissues (offal, gills, muscle and liver) were higher than the concentrations of the metals in water and indicated bioaccumulation. The concentrations of all the metals in water were below WHO and FEPA recommended limits and suggested that the water of Ogba River was suitable for drinking, but the concentrations of Cu, Mn, Cr, Ni and Pb in all fish tissues exceeded these limits and indicated that the fishes of Ogba River, as far as these metals were concerned, were unfit for human consumption. Consequently, close monitoring of metals pollution and the consumption of the fishes of Ogba River is recommended with a view to minimizing the risks to health of the population that depend on the river for their water and fish supply.