Distribution of inorganic arsenic species in groundwater from Central-West Part of Santa Fe Province,Argentina |
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| Affiliation: | 1. Programa de Investigación y Análisis de Residuos y Contaminantes Químicos, PRINARC, Facultad de Ingeniería Química, Universidad Nacional del Litoral, Santiago del Estero 2654 Piso 6, 3000 Santa Fe, Argentina;2. Laboratorio de Análisis de Trazas, Departamento de Química Inorgánica, Analítica y Química Física/INQUIMAE, Facultad de Ciencias Exactas y Naturales, Pabellón II, Ciudad Universitaria, 1428 Buenos Aires, Argentina;1. Utah Water Research Laboratory, 8200 Old Main Hill, Utah State University, Logan, UT 84322-8200, USA;2. Department of Civil and Environmental Engineering, 4110 Old Main Hill, Utah State University, Logan, UT 84322-4110, USA;3. Department of Plants, Soils and Climate, 4820 Old Main Hill, Utah State University, Logan, UT 84322-4820, USA;1. Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun, 130021, PR China;2. College of Environment and Resources, Jilin University, Changchun, 130012, PR China;3. Department of Mining, Metallurgy and Geology Engineering, University of Guanajuato, Guanajuato, 36000, Mexico;1. Internal Medicine, Sarasota Memorial Hospital, Sarasota, FL, USA;2. Infectious Disease, Sarasota Memorial Hospital, Sarasota, FL, USA |
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| Abstract: | ![]()
The distribution of inorganic arsenic species in groundwater used as drinking water supply by the peri-urban and rural population from central-western area of Santa Fe Province, Argentina, was studied. An analytical methodology based on an online system of atomic absorption spectrometry with hydride generation and flow injection (FI-HGAAS) was used for total inorganic arsenic determination. For speciation purposes, the distinction between As(V) and As(III) was performed through the on line coupling of FI-HGAAS to a solid phase system based on an anionic exchanger able to retain As(V) as oxyanion, allowing As(III) to be selectively determined. The concentration of As(V) was calculated as the difference between total arsenic and As(III) concentrations. Effects of matrix interference due to the nonselective behavior of the exchange resins were carefully laid. Results for 59 samples collected from 27 localities showed an almost exclusive predominance of pentavalent forms. |
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