DSpace Arşivi :: by Yazar "Kussainova M.Z." değerine göre listeleniyor

Listeleniyor 1 - 1 / 1

Sorption removal of Pb2+, Cd2+, Cu2+ from diluted acid solution by chitosan modified zeolite
(University of Chemical Technology and Metallurgy, 2018) Kussainova M.Z.; Chernyakova R.M.; Jussipbekov U.Z.; Temel H.; Pasa S.; Kaiybayeva R.A.; Agatayeva A.A.
The 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+.