Study of chemical properties combination chemical method of wastewater treatment by methods IR-spectroscopy and X-ray diffractionM.R. Amonov, E.D. Niyozov, M.M. Amonova, S.I. Nazarov and B.S. GanievE3S Web of Conf., 389 (2023) 01020DOI: https://doi.org/10.1051/e3sconf/202338901020