New magnetic clays MnFe2O4/Shymkent for removal of heavy metals from wastewaterZhaina Baimuratova, Sayat Ermekov, Adriano Silva, Hélder Gomes and Marzhan KalmakhanovaE3S Web Conf., 474 (2024) 01034DOI: https://doi.org/10.1051/e3sconf/202447401034