Production of bentonite and humus natural organic substances from fluoride compoundsBakhron Boynazarov, Tolib Berdiyev, Uktam Temirov, Pirnazar Ganiev and Najimuddin UsanbaevE3S Web Conf., 377 (2023) 03012DOI: https://doi.org/10.1051/e3sconf/202337703012