Cascade method of wastewater treatment using various natural sorbentsAlexey Ovchinnikov, Viktor Bocharnikov, Olesya Bocharnikova, Maria Denisova, Olga Kozinskaya, Evgeny Pustovalov and Tatiana RepenkoE3S Web of Conf., 539 (2024) 01024DOI: https://doi.org/10.1051/e3sconf/202453901024