某铁矿尾矿破裂后地表水水质评价。

IF 5.8 3区 环境科学与生态学 0 ENVIRONMENTAL SCIENCES
Marys Lene Braga Almeida, Rafael Silva Souza, Bruna Nitzsche Morato, Bárbara Fernanda de Melo Jardim, Maria Clara Barbosa, Ana Júlia Silva Macedo, Veber Afonso Figueiredo Costa, Marcelo Libânio
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引用次数: 0

摘要

本文的目的是评估fund o尾矿坝坍塌是否仍然影响米纳斯吉拉斯州(巴西)多塞河的地表水质量。评估了15项水质参数的记录,比较了事故前后的数据。选取了9个采样点,其中6个与供水系统的取水口相对应。记录显示,根据COPAM/2008的规范考虑,fund o大坝坍塌后,溶解铁、溶解铝、真色、浊度和总悬浮物的不合格值百分比有所增加,但总锰和总铅的不合格值百分比有所减少。时间序列分析没有显示出趋势,Levene检验只显示了溶解铁、总溶解固体和溶解铝的方差变化。Mann-Whitney检验显示fund o大坝溃坝后关键参数的中位数没有变化。对于所评估的七种微量金属(As, Cd, Cr, Pb, Hg, Ni和Zn), Mann-Whitney和Pettitt检验允许我们推断,在大坝破裂后,数据序列的中位数浓度发生了变化,并且发生了突变。在事故发生前的记录中,不可能将某些试验和监测站观察到的变化与任何合理的原因联系起来。对于事故发生后的记录,Doce河恢复的前景仍然缺乏更大的统计稳健性,强调了Doce河河道水质监测站维护的相关性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Evaluating the surface water quality after the rupture of an iron mining tailings.

The aim of this article is to assess whether the collapse of the Fundão tailings dam still impacts the surface water quality of the Doce River in the state of Minas Gerais (Brazil). The records of 15 water quality parameters were evaluated, comparing data from before and after the accident. Nine sampling points were selected, six of which corresponded to water intakes for the water supply systems. The records showed that after the collapse of the Fundão Dam, there was an increase in the percentage of non-conforming values for dissolved Fe, dissolved Al, true color, turbidity, and total suspended solids, but a reduction in total Mn and total Pb, based on the Normative Consideration COPAM/2008. The time series analysis showed no trends, with Levene's test indicating variance changes only for dissolved Fe, total dissolved solids, and dissolved Al. Mann-Whitney tests revealed no median changes in key parameters after the Fundão Dam collapse. For the seven trace metals evaluated (As, Cd, Cr, Pb, Hg, Ni and Zn), the Mann-Whitney and Pettitt tests allow us to infer that there was a change in the median concentrations and an abrupt change in the data series after the dam rupture. It is not possible to associate any plausible cause for the changes observed in some tests and monitoring stations in the records prior to the accident. For records after the accident, the prospect of the Doce River's recovery still lacks greater statistical robustness, emphasizing the relevance of maintenance of water quality monitoring stations in the Doce River channel.

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来源期刊
CiteScore
8.70
自引率
17.20%
发文量
6549
审稿时长
3.8 months
期刊介绍: Environmental Science and Pollution Research (ESPR) serves the international community in all areas of Environmental Science and related subjects with emphasis on chemical compounds. This includes: - Terrestrial Biology and Ecology - Aquatic Biology and Ecology - Atmospheric Chemistry - Environmental Microbiology/Biobased Energy Sources - Phytoremediation and Ecosystem Restoration - Environmental Analyses and Monitoring - Assessment of Risks and Interactions of Pollutants in the Environment - Conservation Biology and Sustainable Agriculture - Impact of Chemicals/Pollutants on Human and Animal Health It reports from a broad interdisciplinary outlook.
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