Arsenic-realising hydrogeochemical processes in the Claromecó creek basin, Buenos Aires Province, Argentina
A hydrogeochemical study was performed in the Claromecó Creek basin, Buenos Aires province. This region is featured by groundwaters with arsenic (As) concentrantions that exceed the allowed provincial limit of 50 ppb. Based on the chemical analysis of samples distributed all along the basin and extr...
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| Autores principales: | , , , |
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| Formato: | Artículo revista |
| Lenguaje: | Español |
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CURIHAM: Centro Universitario Rosario de Investigaciones Hidroambientales Facultad de Ciencias Exactas, Ingeniería y Agrimensura. Universidad Nacional de Rosario Director: Dr. Ing. Hernán Stenta Riobamba 245 bis, 2000 Rosario (Santa Fe), Argentina. Telefa
2025
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| Acceso en línea: | https://cuadernosdelcuriham.unr.edu.ar/index.php/CURIHAM/article/view/274 |
| Aporte de: |
| Sumario: | A hydrogeochemical study was performed in the Claromecó Creek basin, Buenos Aires province. This region is featured by groundwaters with arsenic (As) concentrantions that exceed the allowed provincial limit of 50 ppb. Based on the chemical analysis of samples distributed all along the basin and extracted from shallowest Pampean aquifer, the main hydrogeochemical processes were addressed. Such processes were interpreted mainly from bivariate plots and multivariate analysis. Samples were divided into three groups. Group 1 is the one with the lowest concentrations of As whereas group 2 is characterized por high As concentrations, high pH and low concentrations of Na+ y HCO3-. Finally, group 3 also presents high As contents but lower pH and high values of Na+ y HCO3-. The processes that promote the release of As from the sediments in this aquifers were interpreted as the counter-ion effect, the competitive desorption by HCO3- and the ionic strength. These processes act with different intensity in different parts of the basin but simultaneously. This fact confirms the complexity of studying As release in this type of environment. |
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