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Kinetics of copper desorption from regenerated spent bleaching earth

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dc.contributor.author Wambu, EW
dc.contributor.author Muthakia, GK
dc.contributor.author Shiundu, PM
dc.date.accessioned 2015-05-22T14:48:21Z
dc.date.available 2015-05-22T14:48:21Z
dc.date.issued 2009
dc.identifier.citation American-Eurasian Journal of Scientific Research 4 (4): 317-323, 2009 en_US
dc.identifier.uri http://hdl.handle.net/123456789/1040
dc.description.abstract Recent studies have shown that spent bleaching earth (SBE) , a clayey waste from edible oil refineries, could be used to remove Cu from aqueous solutions. Th is could result in copper-laden material whose continual disposal into the environment may lead to bioaccumulation of toxic metal ions in the ecosystems. To asses s the reversib ility of copper uptake by spent bleaching earth, the kinetics of copper recovery from regenerate d spent bleachin g earth (RSBE) was studied on a batch basis in H SO , and CaCl . The acid showed superio r 2 4 2 desorptio n efficiency than competitive effects of Ca ions. The initial solid-phase Cu concentration an d 2+ desorption re sident time were most important factors affecting copper release from RSBE. Up to 80% coppe r recovery was realized in 1-hour agitation period but longer contact time reduced the fraction of metal recovery from the adsorbent. The desorption process was consistent with the parabolic diffusion kinetics in bot h deso rbants although it was also correlated to the first order and second order models in H SO and to th e 2 4 modified Freundlich model in CaCl respectively en_US
dc.language.iso en en_US
dc.title Kinetics of copper desorption from regenerated spent bleaching earth en_US
dc.type Article en_US

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