Graduate Program in Environmental Engineering, Federal University of Ouro Preto, Campus Universitário Morro do Cruzeiro, s/n, Ouro Preto, MG, 35400-000, Brazil.
Federal University of Fronteira Sul, Campus Erechim, ERS 135 - km 72, 200, Erechim, RS, 99700-970, Brazil.
Arch Environ Contam Toxicol. 2019 Jul;77(1):144-153. doi: 10.1007/s00244-019-00625-w. Epub 2019 Apr 11.
The 2015 rupture of the Fundão dam near the district of Bento Rodrigues in Mariana, Minas Gerais, Brazil, released around 50 million m of iron ore tailings. The first tributary of the Rio Doceto receive this waste was the Gualaxo do Norte River. Many groups in Brazil and from around the world have studied the environmental and social impacts of this disaster. However, relationships between the introduction of mining waste, the geological complexity of the area, and the presence of pathogenic organisms have not yet been investigated. The present study aimed to measure the concentrations of enteric pathogens along the Gualaxo do Norte River after the environmental disaster and to correlate their abundance with the presence of metals and semimetals coming from both mining tailings and geological sources. For this purpose, we collected water samples from 27 stations along the entire basin during a hydrological year. The concentrations of metals and semimetals measured in this study were generally within limits established by national and international legislation, except for those of iron and manganese. Positive correlations between the human adenovirus (HAdV) and arsenic, barium, iron, lead, manganese, and nickel were confirmed, allowing us to observe that there is an abundance of the potentially infectious virus present in the studied sites containing metal/semimetal concentrations. These studies indicate the importance of investigations that consider viral enteric pathogens complexed with metals and may favor the stability and prolongation of the infectivity of such pathogens in water destined for human and animal usage.
2015 年，巴西米纳斯吉拉斯州贝通罗德里格斯区附近的丰当大坝破裂，释放了约 5000 万立方米的铁矿石尾矿。第一个接收这些废物的里奥多塞托支流是瓜拉克斯诺特河。巴西和世界各地的许多团体都研究了这场灾难的环境和社会影响。然而，采矿废物的引入、该地区地质复杂性以及致病生物的存在之间的关系尚未得到调查。本研究旨在测量环境灾难后瓜拉克斯诺特河沿线肠道病原体的浓度，并将其丰度与来自采矿尾矿和地质来源的金属和类金属的存在相关联。为此，我们在一个水文年内从整个流域的 27 个站点收集水样。本研究测量的金属和类金属浓度通常在国家和国际法规规定的限值内，除铁和锰外。人类腺病毒 (HAdV) 与砷、钡、铁、铅、锰和镍之间的正相关关系得到了证实，这表明在研究地点存在大量潜在传染性病毒，这些地点的金属/类金属浓度。这些研究表明，需要进行调查，以考虑与金属复合的肠道病毒病原体，这可能有利于此类病原体在供人类和动物使用的水中的稳定性和传染性延长。
