caa a22 4500 463170407 CHVBK 20180406164811.0 cr unu---uuuuu 170326e20070201xx s 000 0 eng 10.1007/s10450-007-9007-7 doi (NATIONALLICENCE)springer-10.1007/s10450-007-9007-7 Sorption of Cu(II) and Eu(III) ions from aqueous solution by olive cake [Elektronische Daten] [M. Konstantinou, K. Kolokassidou, I. Pashalidis] The sorption of Cu(II) on olive cake, a biomass by-product of olive oil production, has been investigated by potentiometry at pH 6, I=0.1M NaClO4, 25 °C and under atmospheric conditions. Numerical analysis of the experimental data supports the formation of surface complexes and allows the evaluation of the corresponding formation constant, which is found to amount log β=5.1±0.4. This value is close to corresponding values given in literature for Cu(II)-humate complexes, indicating that the same type of active sites (e.g. carboxylic and phenolic groups) is responsible for the Cu(II) binding by olive cake. Addition of a competing metal ion (e.g. Eu(III) ion) in the system leads to replacement of the Cu(II) by Eu(III). Evaluation of the potentiometric data obtained from competition experiments indicates on a ionexchange mechanism. The formation constant of the Eu(III) species sorbed on olive cake is found to be log β=5.4±0.9. The results of this study are of particular interest with respect to waste water treatment technologies using biomass products as adsorbent material and environmental impact assessments regarding disposal of biomass by products in the geosphere. Springer Science+Business Media, LLC, 2007 Olive cake nationallicence Copper nationallicence Europium nationallicence Surface complexes nationallicence Ionexchange nationallicence Formation constants nationallicence Konstantinou M. Department of Chemistry, University of Cyprus, P.O. Box 20537, 1678, Lefkosia, Cyprus aut Kolokassidou K. Department of Chemistry, University of Cyprus, P.O. Box 20537, 1678, Lefkosia, Cyprus aut Pashalidis I. Department of Chemistry, University of Cyprus, P.O. Box 20537, 1678, Lefkosia, Cyprus aut Adsorption Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 13/1(2007-02-01), 33-40 0929-5607 13:1<33 2007 13 10450 https://doi.org/10.1007/s10450-007-9007-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10450-007-9007-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Konstantinou M. Department of Chemistry, University of Cyprus, P.O. Box 20537, 1678, Lefkosia, Cyprus aut NATIONALLICENCE 700 1- Kolokassidou K. Department of Chemistry, University of Cyprus, P.O. Box 20537, 1678, Lefkosia, Cyprus aut NATIONALLICENCE 700 1- Pashalidis I. Department of Chemistry, University of Cyprus, P.O. Box 20537, 1678, Lefkosia, Cyprus aut NATIONALLICENCE 773 0- Adsorption Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 13/1(2007-02-01), 33-40 0929-5607 13:1<33 2007 13 10450 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer