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Electrochemical removal of cadmium using a batch undivided reactor with a rotating cylinder electrode
Author(s) -
Grau Javier M,
Bisang José M
Publication year - 2001
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.366
Subject(s) - saturated calomel electrode , electrochemistry , cadmium , electrode , cylinder , space velocity , cathode , analytical chemistry (journal) , anode , materials science , sodium sulfate , batch reactor , chemistry , nuclear chemistry , inorganic chemistry , working electrode , sodium , metallurgy , selectivity , geometry , chromatography , catalysis , mathematics , biochemistry
The performance of an undivided electrochemical batch reactor with a rotating cylinder electrode under potentiostatic control is examined for the removal of cadmium from a sodium sulfate solution containing 500 ppm Cd(II) at pH ≅ 7. The effect of hydrogen evolution as a side cathodic reaction on the figures of merit of the reactor is analysed. The best results were obtained for a cathode potential of −0.9 V against the saturated calomel electrode. With an angular velocity of 1500 rpm the space time yield and the normalized space velocity were 0.66 mol m −3 s −1 and 3.9 h −1 respectively, while the fractional conversion was 67.3% with a current efficiency of 66.7%. The surface morphology of the deposits as a function of the applied potential is also reported. © 2001 Society of Chemical Industry