Open AccessSelective Adsorption of Europium on Activated Charcoal from Aqueous Solutions
Author(s) -
M. Saleem,
M. Afzal,
Riaz Qadeer,
Javed Hanif
Publication year - 1992
Publication title -
adsorption science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.682
H-Index - 36
eISSN - 2048-4038
pISSN - 0263-6174
DOI - 10.1177/026361749200900101
Subject(s) - europium , chemistry , adsorption , aqueous solution , activated charcoal , inorganic chemistry , langmuir , charcoal , ion , organic chemistry
The adsorption of europium on activated charcoal has been studied as a function of shaking time, pH, concentration of adsorbate and temperature. The adsorption of europium obeys the Langmuir and Dubinin-Radushkevich isotherms. Thermodynamic quantities such as ΔH 0 and ΔS 0 have been calculated from the slopes and intercepts of plots of In K D versus 1/T. The influence of different cations and anions on europium adsorption has been examined. The adsorption of other metal ions on activated charcoal has been investigated under specified conditions to check their selectivity for europium. As a result, europium has been successfully removed from a mixture containing Ba, Sr, Ru, Cs, Cr, Nd, Pr and In. Approximately 96% of the europium adsorbed on the activated charcoal was recovered using 45 ml of 3 M HNO 3 . X-ray fluorescence spectrometry was used for measuring the europium concentration.