Geochemical and Microbiological Composition of Soils and Tailings Surrounding the Komsomolsk Tailings, Kemerovo Region, Russia

Abstract

Microorganisms have the potential to address environmental pollution, but the interaction mechanism between microorganisms and mine tailings is not well understood. This work was aimed at determining the bacterial isolates in soils and mine tailings and evaluating the distribution of metals, antimony (Sb), and arsenic (As) in the soils around the Komsomolsk tailings. Areas with high concentrations of As, Sb, cadmium (Cd), and lead (Pb) were found. Assessment based on the value of the contamination factor (CF) indicated large-scale As, Sb, Pb, Cd, iron (Fe), bismuth (Bi), and beryllium (Be) pollution, especially in soils sampled from the northeast direction of the mine tailings. Soils had a higher number of CFUs per g of dry weight than did the tailings, ranging from 84 × 106 to 3.1 × 109 and from 20 × 106 to 1.7 × 109, respectively. Arsenic exhibited a positive statistical correlation with the number of CFUs of Agrococcus and Staphylococcus. In addition, a positive correlation was found between the concentration of Co and the number of CFUs of Moraxella and Microbacterium. The Sb exhibited a positive correlation with Streptomyces. These results can be used to develop methods for waste reclamation, including the use of isolated bacterial strains for arsenic removal by precipitation.

A Snapshot of the Microbiome of a Portuguese Abandoned Gold Mining Area

“…Thus, understanding the diversity and structure of microbial communities in rich metal areas, such as gold mines, is currently of high scientific, industrial and applied relevance. Nonetheless, microbial studies in such settings are still scarce, and while a considerable amount of information is available for prokaryotes, much less is known for fungal communities [6,22,[26][27][28][29][30][31][32][33][34][35][36][37][38]. Commonly, the study of bacteria and archaea in gold mining environments focuses on their uniqueness and phylogenetic diversity in these settings [6,26,27,30,[32][33][34][36][37][38].…”

“…Nonetheless, microbial studies in such settings are still scarce, and while a considerable amount of information is available for prokaryotes, much less is known for fungal communities [6,22,[26][27][28][29][30][31][32][33][34][35][36][37][38]. Commonly, the study of bacteria and archaea in gold mining environments focuses on their uniqueness and phylogenetic diversity in these settings [6,26,27,30,[32][33][34][36][37][38]. Some physiological peculiarities have also been explored, including bacteria contribution to the sulfur cycle, the identification of mercuryresistant strains, the evaluation of heavy metal immobilization potential, and the effects of toxic metals and plant diversity on the communities' organization [6,27,30,[34][35][36].…”