Purification of water and fertile soil with bentonite-like clays of the Belgorod RegionAlexandr Vezentsev, Natalia Volovicheva, Svetlana Korolkova, Lidiia Peristaya, Vitaliy Milyutin and Igor KorolkovBIO Web Conf., 30 (2021) 02001DOI: https://doi.org/10.1051/bioconf/20213002001