Microbiological and chemical properties of shungite water; pp. 361–368

Proceedings of the Estonian Academy of Sciences

article

Silver Türk¹  Tarmo Tamm²  Hugo Mändar³  Ain Raal⁴  Peeter Laurson⁵  Uno Mäeorg⁵ 

[1] Institute of Biomedicine and Translational Medicine, Faculty of Medicine, University of Tartu;Institute of Technology, Faculty of Science and Technology, University of Tartu;Institute of Physics, Faculty of Science and Technology, University of Tartu;Institute of Pharmacy, Faculty of Medicine, University of Tartu;Institute of Chemistry, Faculty of Science and Technology, University of Tartu

关键词: geomicrobiology;    shungite;    water;    susceptibility;    XRD;    XRF;    beer.;   

DOI  :  10.3176/proc.2022.4.06

学科分类：内科医学

来源: Teaduste Akadeemia Kirjastus

【 摘 要 】

Shungite is used in water filters that remove Escherichia coli from water. The mechanism and spectrum of the antibacterial activity of shungite are not precisely known. In this study, shungite and its dried water extract were characterized by means of X-ray diffraction, X-ray fluorescence and iodometry. The dried residue of the water extract of shungite was relatively poor in carbon (28.1% in the rock vs 0.5% in the residue), silica (23.9% in the rock vs 0.3% in the residue) and potassium (1.14% vs 0.05%), but rich in sulfur (1.6% vs 21.6%) and some metals, including iron (1.4% vs 10%), aluminum (2.1% vs 5%) and nickel (0.02% vs 1.14%). The survival of Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, Candida albicans, Streptococcus uberis and Saccharomyces cerevisiae in shungite water was measured. Escherichia coli, Pseudomonas aeruginosa and Streptococcus uberis did not survive for 24 hours in 3:7 shungite water extract, while Staphylococcus aureus, Candida albicans and Saccharomyces cerevisiae survived as well as in distilled water. Neutralization of pH did not abolish the bactericidal effect. However, in the presence of nutrients, shungite water did not show bacteriostatic or bactericidal effects.

【 授权许可】

CC BY