Toxicity Assessment of Waters from Rio Doce after the Fundão Dam Rupture to Zebrafish Embryos.

IF 2.7 4区 环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES
Guacira de Figueiredo Eufrasio Pauly, Flávia Yoshie Yamamoto, Denis Moledo de Souza Abessa
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引用次数: 0

Abstract

The collapse of the Fundão Dam in 2015 caused strong alterations of physical-chemical properties of water bodies in the Rio Doce Basin, including the release of large quantities of metals. This study aimed to evaluate whether water samples collected along the Doce River after dam failure could affect the development of Danio rerio embryos. Water samples were collected immediately and 6 months after the rupture at multiple sites distributed across the river basin, and toxicity tests were conducted using recently fertilized eggs, in 24-well plates. The concentrations of As, Cd, Mn, and Ni in water samples collected immediately after the dam rupture exceeded the limits established by federal standards. No significant lethal or sublethal effects were observed in D. rerio embryos exposed to water samples in both sampling surveys. Based on our results, we hypothesized that although the concentrations of some elements were high, metals were likely not or poorly bioavailable, causing no significant changes in the exposed organisms.

大坝破裂后里约热内卢水域对斑马鱼胚胎的毒性评价。
2015年fund o大坝的崩塌导致了里约热内卢Doce盆地水体理化性质的强烈变化,包括大量金属的释放。本研究旨在评估多斯河溃坝后采集的水样是否会影响达尼罗胚胎的发育。在整个流域分布的多个地点立即和6个月后采集水样,并在24孔板中使用最近受精卵进行毒性测试。大坝破裂后立即收集的水样中砷、镉、锰和镍的浓度超过了联邦标准规定的限度。在这两次抽样调查中,均未观察到暴露于水样的鼠胚胎有明显的致死或亚致死作用。根据我们的研究结果,我们假设,尽管某些元素的浓度很高,但金属可能没有或生物可利用性差,因此对暴露的生物体没有造成显著变化。
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来源期刊
CiteScore
5.60
自引率
3.70%
发文量
230
审稿时长
1.7 months
期刊介绍: The Bulletin of Environmental Contamination and Toxicology(BECT) is a peer-reviewed journal that offers rapid review and publication. Accepted submissions will be presented as clear, concise reports of current research for a readership concerned with environmental contamination and toxicology. Scientific quality and clarity are paramount.
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