Concentration and human health risks of heavy metals (Pb, Cu, Cr, Cd, As, Ni) in water, sediment, crab (Tympanotonus fuscatus) and periwinkle (Callinectes amnicola) were assayed in New Calabar River, Nigeria. Results revealed that concentration (mg/L) of the metals in water in the two seasons studied, ranged from 1.1E-2 ± 1.0E-3…for Cd to 2.90 ± 0.03…for Cu. In sediment, the concentration (mg/kg) ranged from 1.1E-2 ± 1.0E-3…for As to 5.17 ± 0.04… for Ni. In biota, the concentration (mg/kg) ranged from 0.01…for As in crab to 19.22…for Cu also in crab. Estimated human health risk from the metals contamination due to consumption of biota gave each of HQ and HI as < 1, indicating no risk except at Agip’s sample location where HI was > 1. Estimated human health risk due to dermal absorption through swimming, indicated no risk as each of HQ and HI was < 1. These make the river unpolluted except at Agip’s sample location.

中文翻译：

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新卡拉巴尔河中重金属污染的人类健康风险评估。

水，沉积物，螃蟹（Tympanotonus fuscatus）和长春花（Callinectes amnicola）中重金属（Pb，Cu，Cr，Cd，As，Ni，Pb）的浓度和人类健康风险在尼日利亚新卡拉巴尔河进行了测定。结果表明，在所研究的两个季节中，水中金属的浓度（mg / L）范围从Cd的1.1E-2±1.0E-3…到Cu的2.90±0.03…。在沉积物中，浓度（mg / kg）的范围从As的1.1E-2±1.0E-3…到Ni的5.17±0.04…。在生物区系中，浓度（mg / kg）的范围从螃蟹中的0.01…砷（As）到19.22…（铜）。由于消耗生物群而造成的金属污染对人体健康的估计风险使HQ和HI均<1，表明除在Agip HI> 1的样本位置外，无其他风险。由于HQ和HI均小于1，因此存在风险。除了Agip的采样地点外，这些河流均未被污染。