Change in water quality in an Amazonian microbasin: ecological and human health implications.

Autor:	Batista LF; Bachelor of Science and Water Technology, Federal University of Western Pará, Av Mendonça Furtado, 2946, Santarém, PA 68040-070, Brazil., Rocha do Nascimento TS; Bachelor of Science and Water Technology, Federal University of Western Pará, Av Mendonça Furtado, 2946, Santarém, PA 68040-070, Brazil., Costa I; Department of Geology, Federal University of Western Pará, Av. Vera Paz, s/n. Salé, Santarém, PA 68035-110, Brazil., Correa ES; Department of Petroleum Exploration and Production, Universidade Federal do Pará, St. Raimundo Santana Cruz, PA 68721-000 Salinópolis, Brazil., Monte CDN; Department of Geology, Federal University of Western Pará, Av. Vera Paz, s/n. Salé, Santarém, PA 68035-110, Brazil E-mail: christiane.monte@yahoo.com.br; christiane.monte@ufopa.edu.br.
Jazyk:	angličtina
Zdroj:	Journal of water and health [J Water Health] 2024 Mar; Vol. 22 (3), pp. 522-535. Date of Electronic Publication: 2024 Feb 29.
DOI:	10.2166/wh.2024.286
Abstrakt:	The decline in the quality of water resources in the Amazon is very rapid in cities suffering from unplanned urban growth. The region has two defined seasons, winter (wet) and summer (dry), which directly affect the behavior of contaminants in aquatic ecosystems. The aim of this study was to assess the ecological and human health risks associated with the use of the watershed. In addition, an ecological index was proposed: the Quality Index for Aquatic Life, for the risk of contaminants to aquatic life. Sampling was carried out at six points in the Juá watershed. Physicochemical parameters, major anions, metals and total phosphorus were analyzed at both stations between 2020 and 2021. The highest concentrations of contaminants were found in the rainy season, due to the washing away of the banks. In this sense, Cl presented a concentration more than 307 times higher than that permitted by Brazilian legislation (wet). The ecological index showed that the watershed has a high risk of metals such as Cr III and Cr VI for the biota. The human health risk analysis showed a low risk; however, the lack of basic sanitation in the city indicates that monitoring of urban water resources is necessary. Competing Interests: The authors declare there is no conflict. (© 2024 The Authors This is an Open Access article distributed under the terms of the Creative Commons Attribution Licence (CC BY-NC-ND 4.0), which permits copying and redistribution for non-commercial purposes with no derivatives, provided the original work is properly cited (http://creativecommons.org/licenses/by-nc-nd/4.0/).)
Databáze:	MEDLINE
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