Metodología para la determinación de Hg en sedimentos y aguas empleando EAA
DOI:
https://doi.org/10.22517/23447214.24586Keywords:
Heavy metals, pollution, quantification.Abstract
The use of Hg in gold mining processes generates waste with a high content of this heavy metal, which can reach different aqueous media due to its constant discharge. According to the above, an analytical methodology for the determination of mercury (Hg) by Cold Vapor-Atomic Absorption Spectroscopy (CV-AAS) was validated taking into account the levels allowed by the EPA SW-846 standard for water samples and sediments. This work began with the implementation of Hg calibration curves and digestion processes to determine linearity, repeatability, and working range. The known concentration standards and real samples were evaluated under the typical analytical characteristics in the validation such as linearity, detection limit, quantification limit, precision, accuracy, repeatability, reproducibility, recovery percentages and uncertainty. The validated methodology met the required statistical parameters such as linearity and instrumental precision, registering variation coefficients less than 3%, a quantification limit of 0,35 µg/L and recovery percentages between 97,26 and 101,62%. A performance test was performed with reference samples to ensure reliable analytical results. Values of uncertainties of ± 0,064, ± 0,0440 and ± 0,0410 were determined for liquid, solid and leached solid samples respectively.
Downloads
References
[2] O. García y J. Molina, 2010. Introducción de tecnologías más limpias en la minería y la extracción del oro artesanales, en el Nordeste Antioqueño y Bajo Cauca Antiqueño, Colombia. En: Técnicas aplicadas a la caracterización y aprovechamiento de recursos geológicos mineros. Ed. E. Berrezueta y M. J. Domínguez. Red Minera XXI. CYTED., 2010. Disponible en:http://www.sedpgym.es/descargas/libros_actas/POTOSI_2011/17_OSEAS_271-280.pdf Consultado: 26-03-2020.
[3] O. Gyamfi, P.B. Sorenson, G. Darko, E. Ansah, J.L. Bak, “Human health risk assessment of exposure to indoor mercury vapour in a Ghanaian artisanal small-scale gold mining community”, Chemosphere, vol. 241, 125014, 2020, https://doi.org/10.1016/j.chemosphere.2019.125014.
[4] US Environmental Protection Agency, 1996. Toxicity characteristic leaching procedure (TCLP): method 1311. In: Test Methods for Evaluating Solid Waste, SW-846, 3rd Edition. (Revision III, December 1996).
[5] CENAM. Métodos Analíticos Adecuados a su Propósito. Guía de Laboratorio para la Validación de Métodos y Temas Relacionados (J. Guardado; F. Mercader, Trads.). 2da Ed. México. 2005. (Trabajo original publicado en 1998).
[6] US Environmental Protection Agency, 1996. Toxicity characteristic leaching procedure (TCLP): method 1311. In: Test Methods for Evaluating Solid Waste, SW-846, 3rd Edition. (Revision III, December 1996).
[7] US Environmental Protection Agency. Method 7470A – mercury in liquid waste (manual cold-vapor technique), 6 p, September 1994.
[8] J. Miller y J. Miller, Estadística y Quimiometría para Química Analítica. 4ª Edición. Editorial Prentice Hall. España. 2000. 278p.
[9] S.S. Sorini and L.P. Jackson “Evaluation of the toxicity characteristic leaching procedure (TCLP) on utility wastes”, Nuclear and Chemical Waste Management, vol. 8, p.p. 217–223, 1988.
[10] SKOOG, D. Principios De Análisis Instrumental. 5ª Edición. Editorial Mcgraw Hill. España. 2001.
[11] Instituto de Hidrología, Meteorología y Estudios Ambientales IDEAM. “Determinación de Metales Pseudototales en Suelos y Bioabonos y Metales Totales en Forrajes, por Espectrofotometría Atómica - Llama Directa, Espectrofotometría Atómica – Horno de Grafito y Emisión por Plasma – (Digestión Abierta a Reflujo)”. 31/01/2008.
[12] A.D. Eaton. Standard methods for the examination of water & wastewater. Centennial edition. 21st Edition. 2005. SM 3030 E, SM 3112 B, SM 3111D.
[13] J. Hansen, C. Reed, M. Scudese, L. Lazarus, F. Park, Technical Assistance Document for Complying with the TC Rule and Implementing the Toxicity Characteristic Leaching Procedure (TCLP), Report No. EPA-902-B-94-001, United States Environmental Protection Agency, 1994.
[14] T. Jong and D.L. Parry, Evaluation of the stability of arsenic immobilized by microbial sulfate reduction using TCLP extractions and long-term leaching techniques.Environmental Analytical Chemistry Unit, School of Science and Primary Industries, Faculty of Education, Australia.14 December 2004.
[15] Organización mundial de la salud. Guías para la calidad del agua potable, Vol. 1: Recomendaciones. 3ra Ed. ISBN 92 4 154696 4.
[16] W. Horwitz and R.J. Albert, The Horwitz Ratio (HorRat): A Useful Index of Method Performance with Respect to Precision. Assoc. Off. Anal. Chem., Vol 89, No. 4, pp. 1095-1109, 2006.
[17] C.E. Halim, R. Amala, D. Beydoun, J.A. Scott, G. Low. Evaluating the applicability of a modified toxicity characteristic leaching procedure (TCLP) for the classification of cementitious wastes containing lead and cadmium. Centre for Particle and Catalyst Technologies, School of Chemical Engineering and Industrial Chemistry, Australia 11 July 2003.
[18] J. Mantey, K.B. Nyarko, F. Owusu-Nimo, K.A. Awua, C.K. Bempah, R.K. Amankwah, W.E. Akatu, E. Appiah-Effah, “Mercury contamination of soil and water media from different illegal artisanal small-scale gold mining operations (galamsey)”, Heliyon, vol. 6, 6, 2020, https://doi.org/10.1016/j.heliyon.2020.e04312.
[19] J. Marrugo-Negrete, J. Pinedo-Hernández, S. Díez, “Geochemistry of mercury in tropical swamps impacted by gold mining”, Chemosphere, vol. 134, p.p. 44-51, 2015, https://doi.org/10.1016/j.chemosphere.2015.03.012.
Downloads
-
Vistas(Views): 277
- PDF (Español (España)) Descargas(Downloads): 222
- HTML (Español (España)) Descargas(Downloads): 2
Published
How to Cite
Issue
Section
License
Copyright (c) 2023 Scientia et Technica
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Copyrights
The journal is free open access. The papers are published under the Creative Commons Attribution / Attribution-NonCommercial-NoDerivatives 4.0 International - CC BY-NC-ND 4.0 license. For this reason, the author or authors of a manuscript accepted for publication will yield all the economic rights to the Universidad Tecnológica of Pereira free of charge, taking into account the following:
In the event that the submitted manuscript is accepted for publication, the authors must grant permission to the journal, in unlimited time, to reproduce, to edit, distribute, exhibit and publish anywhere, either by means printed, electronic, databases, repositories, optical discs, Internet or any other required medium. In all cases, the journal preserves the obligation to respect, the moral rights of the authors, contained in article 30 of Law 23 of 1982 of the Government Colombian.
The transferors using ASSIGNMENT OF PATRIMONIAL RIGHTS letter declare that all the material that is part of the article is entirely free of copyright. Therefore, the authors are responsible for any litigation or related claim to intellectual property rights. They exonerate of all responsibility to the Universidad Tecnológica of Pereira (publishing entity) and the Scientia et Technica journal. Likewise, the authors accept that the work presented will be distributed in free open access, safeguarding copyright under the Creative Commons Attribution / Recognition-NonCommercial-NoDerivatives 4.0 International - https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es license.