Search results for "ionic"
showing 10 items of 2016 documents
Influence of hydrogen cations on kinetics and equilibria of heavy-metal sorption by algae-sorption of copper cations by the alga
2012
The influence of hydrogen cations on kinetics and equilibria of sorption of copper cations by the marine alga Palmaria palmata (Linnaeus) Weber & Mohr was studied under static conditions. The competitive effect of the H+ cations is described, which influenced the uncertainty of evaluation of the alga sorption capacity. Under static conditions, the variation of the Cu2+/H+ concentration ratio during sorption was found nonmonotonic. The Langmuir isotherm model was used to determine the sorption capacity of the alga, namely 12.4 mg g−1 of dry algae mass. A similar value was determined from the kinetic parameters of the ionic exchange which is considered a pseudo-second-order chemical reaction.…
CCDC 250249: Experimental Crystal Structure Determination
2005
Related Article: A.Volonterio, C.Ramirez de Arellano, M.Zanda|2005|J.Org.Chem.|70|2161|doi:10.1021/jo0480848
CCDC 204503: Experimental Crystal Structure Determination
2004
Related Article: A.Volonterio, S.Bellosta, F.Bravin, M.C.Bellucci, L.Bruche, G.Colombo, L.Malpezzi, S.Mazzini, S.V.Meille, M.Meli, C.R.de Arellano, M.Zanda|2003|Chem.-Eur.J.|9|4510|doi:10.1002/chem.200304881
CCDC 204501: Experimental Crystal Structure Determination
2004
Related Article: A.Volonterio, S.Bellosta, F.Bravin, M.C.Bellucci, L.Bruche, G.Colombo, L.Malpezzi, S.Mazzini, S.V.Meille, M.Meli, C.R.de Arellano, M.Zanda|2003|Chem.-Eur.J.|9|4510|doi:10.1002/chem.200304881
CCDC 229785: Experimental Crystal Structure Determination
2004
Related Article: B.Kranke, D.Hebrault, M.Schultz-Kukula, H.Kunz|2004|Synlett|2004|671|doi:10.1055/s-2004-817775
CCDC 641724: Experimental Crystal Structure Determination
2007
Related Article: J.B.Kyziol, E.M.Nowakowska, J.Zaleski|2007|Acta Crystallogr.,Sect.E:Struct.Rep.Online|63|o2834|doi:10.1107/S1600536807021332
CCDC 177330: Experimental Crystal Structure Determination
2002
Related Article: Y.Akhriff, J.Server-Carrio, A.Sancho, J.Garcia-Lozano, E.Escriva, L.Soto|2001|Inorg.Chem.|40|6832|doi:10.1021/ic0106571
Biochar from byproduct to high value added material – A new adsorbent for toxic metal ions removal from aqueous solutions
2018
Abstract An activated biochar coming from pyrolysis of dead Posidonia oceanica residues has been tested as adsorbent material for Cd2+, Pb2+ and Cu2+ ions. The biomass, the activated and the non activated biochars were previously characterized by using several instrumental techniques. The pH of metal ion solution in kinetic and thermodynamic adsorption experiments was fixed at 5 whilst, the dependence on ionic medium, ionic strength and temperature have been evaluated carrying out batch experiments at different experimental conditions. Differential Pulse Anodic Stripping Voltammetry and Inductively Coupled Plasma Optical Emission Spectroscopy have been used to measure the metal ion concentr…
Interaction of UO2(2+) with ATP in aqueous ionic media.
2005
Interaction of dioxouranium(VI) (uranyl) ion with ATP was studied by ligand/proton and metal/hydroxide displacement technique, at very low ionic strength and at I=0.15 mol L(-1), in aqueous Me4NCl and NaCl solutions, at t=25 degrees C. Measurements were carried out in the pH range 3-8.5, before the formation of precipitate. Computer analysis allowed us to find the quite stable species UO2(ATP)H2(0), UO2(ATP)H-, UO2(ATP)2-, UO2(ATP)2(6-), UO2(ATP)2H2(4-) and UO2(ATP)(OH)3- whose formation constants are (at I=0 mol L(-1)) logbeta(112)=18.21, logbeta(111)=14.70, logbeta(110)=9.14, logbeta(120)=12.84, logbeta(122)=24.82, and logbeta(11-1)=2.09, respectively. Different values were obtained in th…
FUNCTIONALIZED HALLOYSITE NANOTUBES FOR ENHANCED REMOVAL OF Hg2+ IONS FROM AQUEOUS SOLUTIONS
2021
AbstractWater is essential for humans, animals, and plants; pollutants, usually derived from anthropogenic activities, can have a serious effect on its quality. Heavy metals are significant pollutants and are often highly toxic to living organisms, even at very low concentrations. Among the numerous removal techniques proposed, adsorption onto suitable adsorbent materials is considered to be one of the most promising. The objective of the current study was to determine the effectiveness of halloysite nanotubes (HNT) functionalized with organic amino or thiol groups as adsorbent materials to decontaminate polluted waters, using the removal of Hg2+ ions, one of the most dangerous heavy metals…