Kussainova M.Z.Chernyakova R.M.Jussipbekov U.Z.Temel H.Pasa S.Kaiybayeva R.A.Agatayeva A.A.2024-04-242024-04-2420181314-7471https://hdl.handle.net/11468/25190The results of investigations on sorption activity of chitosan modified natural zeolite in regard to the simultaneous presence of Pb2+, Cd2+ and Cu2+ are presented. The influence of the process duration and the cations concentration on the degree of their adsorption in diluted (20 % H3PO4) phosphoric acid is determined. The sorption curves show peaks at the 5-th and the 10-th minute most probably because of desorption from the sorbent. Under identical concentrations of all heavy metal cations studied (CPb 2+ = CCd 2+ = CCu 2+), the sorption degree in respect to lead cations is within the range of 78.02 % - 90.65 %, that in respect to cadmium cations varies from 71.22 % to 92.39 %, while that in respect to copper - from 42.00 % to 95.26 %. The character of the sorption curves recorded at identical concentrations of Pb2+ and Cd2+ but at a greater content of Cu2+ is the same. The degree of cadmium cations sorption varies from 92.39 % to 70.22 %. Cu and Pb cations are sorbed in a less amount. The degree of their sorption within 10 min refers to 88.42 % and 90.65 %, respectively, in case Cpb2+ = CCd2+ < CCu 2+.eninfo:eu-repo/semantics/closedAccessCadmiumChitosanCopper İonsLeadModified ZeolitePhosphoric AcidSorptionArticle531941002-s2.0-85037838841Q3