Microbial diversity was studied in the floodplain marsh of the Syrgil River in the area of groundwater discharge near the low-level radioactive waste storage facility of the Zelenogorsk Electrochemical Plant (Krasnoyarsk krai, Russia). The contact between floodplain marsh and technogenically altered groundwater leads to enrichment of marsh waters with nitrate and sulfate ions. Under these conditions, a microbial community has formed, where the most abundant identified genera were Paenibacillus, Devosia, Acidovorax, Clostridium, Hyphomicrobium, Pseudomonas, and Legionella, which are able to exist at high salt concentrations and perform nitrate reduction via denitrification and ammonification. Laboratory experiments were carried out to evaluate the activation of nitrate reduction by molasses and phosphorus-containing additives and to demonstrate the prospects of in situ bioremediation.
Volosnikov et al. (Sun,) studied this question.