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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Hydrochemical and radiometric evaluation of fresh and thermal waters from Araxa city (Minas Gerais, Brazil)

Full text
Author(s):
Bonotto, Daniel M. [1]
Total Authors: 1
Affiliation:
[1] Univ Estadual Paulista UNESP, Inst Geociencias & Ciencias Exatas IGCE, Av 24-A 1515, POB 178, BR-13506900 Rio Claro, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: ENVIRONMENTAL GEOCHEMISTRY AND HEALTH; AUG 2021.
Web of Science Citations: 0
Abstract

This paper reports the hydrochemistry and activity concentration of the natural radionuclides U-238, U-234, and Po-210 for three compartments of the hydrological/hydrogeological system in Araxa city, Minas Gerais State, Brazil: 1) mineral waters from the prominent springs Dona Beja (DBS) and Andrade Junior (AJS), occurring at Barreiro area; 2) surface waters from Barreiro area and vicinity; and 3) rainwater. According to the Rule for Mineral Waters in Brazil (Register 7841) for temperature, the DBS water is cold (< 25 degrees C), while AJS is hypothermal (25-33 degrees C). The TDS (Total Dissolved Solids) concentration of DBS is low (70 mg/L), but high in AJS (2898 mg/L). The hydrogeochemical facies corresponded to sodium-(bi)carbonate for AJS and sodium/potassium-bicarbonate for DBS. The hydrochemical differences of DBS and AJS waters reflect the distinct characteristics of their respective aquifer systems. The DBS classification for TDS is the same of the Barreiro basin surface waters (mean TDS = 102 mg/L). Such value is somewhat higher than that of the rainwater and surface waters used for human consumption at Araxa city (TDS < 50 mg/L). The dataset reported in this paper indicated that fluoride and barium exceeded the WHO limits proposed in 2011 for drinking water. Among the natural radionuclides analyzed here that offer potential hazards for the human health is Po-210, whose WHO's limiting value of 100 mBq/L in drinking water was exceeded in rainwater, thus, restricting the use of this resource as a possible supply of drinking water for the local community. (AU)

FAPESP's process: 18/25332-0 - Contribution of the natural isotopes of uranium for evaluating weathering processes in hydrographic basins from Araxá (MG)
Grantee:Daniel Marcos Bonotto
Support Opportunities: Regular Research Grants
FAPESP's process: 14/50945-4 - INCT 2014: National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactivies
Grantee:Maria Valnice Boldrin
Support Opportunities: Research Projects - Thematic Grants