Physicochemical, isotopic, spectral, and microbiological analyses of water from glacier mappa, chilean andes

• Autores: Ignat Ignatov, Nedyalka Valcheva
• Localización: Journal of the Chilean Chemical Society (Boletín de la Sociedad Chilena de Química), ISSN-e 0717-6309, ISSN 0366-1644, Vol. 68, Nº. 1, 2023, págs. 5802-5806
• Idioma: inglés
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• Resumen

  • The physicochemical and microbiological parameters of glacial water sourced from Glacier Mappa, Andes Mountains, Chile are described. The study is performed on isotopic composition in collaboration with Oleg Mosin. Glacier Mappa has located 55 km from Los Andes in the Aconcagua river basin and the sub-basin Rio Blanco. The research of glacier water Mappa has performed at 3.5 km from the source and the temperature t was 10.10С. The altitude above sea level is 2130 m. The water source Glacier Mappa, Chile is characterized by microbiological indicators. Research is conducted for Coliforms, Escherichia coli, Enterococci, and Clostridium perfringens. The pathogenic micro-organisms in the samples of the glacial water from the source mentioned above are determined by the methods according to Ordinance No. 9/2001, Official State Gazette, issue 30, and decree No. 178/23.07.2004 of Council of Ministers, Bulgaria about the quality of water, intended for drinking and household purposes. The parameters of the physicochemical composition include 18 indicators and are determined according to Ordinance No. 9/2001 (Protocol No. 12735/17.03.2016 of licensed laboratory Eurotest control, Sofia, Bulgaria). The physicochemical and microbiological parameters of glacier water Mappa, Chile, correspond to all controlling parameters and are in accordance with Ordinance No. 9/2001 (Official State Gazette, issue 30 about the quality of water, intended for drinking and household purposes). The natural waters consist of 99.7 mol. % of H216O, which are formed by 1H and 16O atoms (Jouzel, 2003; Mosin, Ignatov, 2011). The remaining 0.3 mol.% is distributed in isotope varieties (isotopomers) of water molecules, whose deuterium atoms form 6 configurations – HD16O, HD17O, HD18O, D216O, D217O, D218O, as 3 configurations are formed by isotopes of oxygen – Н216O, Н217O, Н218O. Studies of International standard SMOW of isotopic shift for D were performed for D/H for water from Glacier Mappa, Chile. The results of glacier water in Mappa, Chile show a lower content of hydrogen and oxygen isotopes. It is not confirmed the presence of pathogenic micro-organisms. The physicochemical indicators are typical for waters during the ice melting in glacier water (Ca2+ 6.0; Mg2+ 1.0; Na+ 5.0; K+ 0.38; HCО3-73.8 /mg. L-1). Glacier water Mappa is soft with total mineralization – 100.1 mg.L-1. The water of Glacier Mappa is beneficial for health according to the indicated physicochemical, microbiological, and isotopic parameters.