Department of Chemistry, University of Uyo, Uyo, Nigeria.
International Centre for Energy and Environmental Sustainability Research (ICEESR), University of Uyo, Uyo, Nigeria.
Bull Environ Contam Toxicol. 2020 Aug;105(2):317-324. doi: 10.1007/s00128-020-02921-x. Epub 2020 Jun 29.
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.
在尼日利亚新卡拉巴尔河，测定了水中、沉积物、螃蟹（Tympanotonus fuscatus）和海胆（Callinectes amnicola）中重金属（Pb、Cu、Cr、Cd、As、Ni）的浓度及其对人类健康的潜在风险。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，金属的浓度（mg/kg）范围从 As 的 1.1E-2 ± 1.0E-3…到 Ni 的 5.17 ± 0.04…。在生物体内，金属浓度（mg/kg）范围从螃蟹体内的 As 的 0.01…到 Cu 的 19.22…。由于食用生物体内的污染物而导致的人体健康风险（HQ 和 HI）均小于 1，表明除了 Agip 采样点之外，没有风险，而在 Agip 采样点，HI 大于 1。由于游泳时皮肤吸收导致的人体健康风险（HQ 和 HI）均小于 1，表明没有风险。除了 Agip 采样点，这条河没有受到污染。
