Scientific Research Publishing

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53236#.VLh228nQrzE Author(s)    Ponyadira Kabwadza-Corner 1* , Erni Johan 2 , Naoto Matsue 1   Affiliation(s) 1 Laboratory of Applied Chemistry for Environmental Industry, Faculty of Agriculture, Ehime University, Matsuyama, Japan . 2 Graduate School of Science and Engineering, Matsuyama, Japan . ABSTRACT The adsorption of Pb on zeolites A4, X, Y and mordenite was studied at various initial pH with the purpose of assessing the pH dependence of Pb adsorption. The adsorption was conducted using 0 - 0.6 mM PbNO 3 in the presence of 100 mM NH 4 NO 3 and pH adjustment done using HNO 3 . The coexisting NH 4 NO 3 served as a representative of other cations available in nature. The study was conducted at initial solution pH ranging from 3 - 5. Adsorption results were analyzed using Langmuir isotherm analysis. Adsorption was noted to be dependent on pH wi...

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53207#.VLcnXsnQrzE Author(s)   I. Z. Mukasa-Tebandeke 1* , P. J. M. Ssebuwufu 1 , S. A. Nyanzi 1 , A. Schumann 2 , M. Ntale 1 , G. W. Nyakairu 1 , F. Lugolobi 3   Affiliation(s) 1 Department of Chemistry, Makerere University, Kampala, Uganda . 2 Department of Geology, Makerere University, Kampala, Uganda . 3 Department of Earth Sciences, Wesleyan University, Middletown, USA . ABSTRACT The Langmuir isotherms of 1-aminobutane in isohexane slurries showed increase in clay acidity with increase in concentration of mineral acid used to leach the clay as well as the temperature at which the clay was thermally activated prior to experimentation involving adsorption of 1-aminobutane. The values of acidity for Central Uganda were low ranging from 0.07 mol/g to 0.32 mol/g yet those for clays from Eastern Uganda were high ranging from 0.1 mol/g to 1.85 mol/g. Based...

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=47890#.VEdE31fHRK0 Author(s)   Fabian A. Ugbe , Aloysius A. Pam , Abiola V. Ikudayisi Affiliation(s) Department of Chemistry, Federal University Lokoja, Lokoja, Nigeria . Department of Chemistry, Federal University Lokoja, Lokoja, Nigeria . Department of Chemistry, Federal University Lokoja, Lokoja, Nigeria . ABSTRACT The adsorption of Cr (III) ion from aqueous solution using orange peels as adsorbent was investigated using batch equilibrium technique. The research is significant as it’s aimed at investigating the suitability of orange peel, a waste product as adsorbent for the adsorption of Cr (III) ions from aqueous solution...