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Former uranium mine-induced effects in caged roach: a multiparametric approach for the evaluation of in situ metal toxicity

机译:铀矿在笼养蟑螂中引起的影响:一种用于评估原位金属毒性的多参数方法

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摘要

To characterize environmental risks linked to former uranium mines in the Limousin region of France, a study was conducted on fish health effects from uranium releases. Two private ponds were compared in this study, one with uranium contamination and one background site, upstream of the mining zone. Roach, Rutilus rutilus, were caged for 28 days in both ponds. Physico-chemical parameters of water and sediments and bioaccumulation of metals in several organs were determined. After 14 and 28 days of caging, immune, oxidative stress, biotransformation, neurotoxicity and physiological parameters were measured. Iron and aluminium were quantified in the water of both sites; however, barium and manganese were only present in the water of the uranium contaminated site. Uranium was present in both sites but at very different concentrations. The sediments from the uranium contaminated site contained high levels of radioactive elements coming from the disintegration chain of uranium. Results of biological parameters indicated stimulation of immune parameters and of oxidative stress and a decrease of AChE in fish caged in the uranium contaminated pond compared to the uranium-free pond. Overall, the results determined roach health status in the context of pollution from poly-metallic mining. The data strengthen our knowledge of the environmental risk assessment associated with radioactive substances in the environment.
机译:为了表征与法国利穆赞地区前铀矿有关的环境风险,对铀释放对鱼类健康的影响进行了一项研究。在这项研究中,对两个私人池塘进行了比较,一个是铀污染,另一个是矿区上游的背景。在两个池塘中将蟑螂Rutilus rut​​ilus圈养28天。测定了水和沉积物的物理化学参数以及几个器官中金属的生物富集。笼养14天和28天后,测量了免疫,氧化应激,生物转化,神经毒性和生理参数。在两个地点的水中都对铁和铝进行了定量;但是,钡和锰仅存在于铀污染场所的水中。铀存在于两个地点,但浓度差异很大。来自铀污染场地的沉积物含有高水平的放射性元素,这些放射性元素来自铀的崩解链。生物学参数的结果表明,与无铀池塘相比,在被铀污染的池塘中饲养的鱼中,免疫参数和氧化应激得到刺激,AChE降低。总体而言,该结果确定了多金属采矿造成污染时蟑螂的健康状况。这些数据加强了我们对与环境中放射性物质相关的环境风险评估的了解。

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