<span style="font-size:12.0pt;font-family:"Times New Roman","serif"; mso-fareast-font-family:Calibri;mso-fareast-theme-font:minor-latin;mso-ansi-language: EN-IN;mso-fareast-language:EN-US;mso-bidi-language:AR-SA">Influence of organic ligands on kinetics of adsorption of lead(II) by kaolin under various <i style="mso-bidi-font-style:normal">p</i>H conditions</span>

Abraham, Beena T; Anirudhan, T S

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Please use this identifier to cite or link to this item: http://nopr.niscpr.res.in/handle/123456789/16023

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DC Field	Value	Language
dc.contributor.author	Abraham, Beena T	-
dc.contributor.author	Anirudhan, T S	-
dc.date.accessioned	2013-02-21T19:05:52Z	-
dc.date.available	2013-02-21T19:05:52Z	-
dc.date.issued	1999-10	-
dc.identifier.uri	http://hdl.handle.net/123456789/16023	-
dc.description	1029-1034	en_US
dc.description.abstract	Adsorption of lead(II) from aqueous solution in presence of nitrilotriacetic acid(NTA) and ethylenediaminetetraacetic acid(EDTA) by kaolin has been studied using the batch equilibrium method. The study shows that Pb(II) adsorption by kaolin at different concentrations of NTA and EDTA obeys multiple first-order kinetics. The rate constants of Pb(II) adsorption for both fast and slow processes in presence and absence of organic ligands at different pH values have also been determined. With increase in pH the adsorption of NTA and EDTA decreases. In the absence of organic ligands the rate constants of initial fast process were 18-27 times higher than the slow process in the pH range of 2.0 to 9.0. Maximum adsorption of organic ligands takes place at pH 2.0. NTA and EDTA have a significant promoting effect on the adsorption of Pb on to kaolin at pH 2.0 whereas the ligands have a significant retarding effect on the adsorption at pH 4.0 and 9.0. The kaolin surface carries a net positive charge at pH 2.0, thus negatively charged Pb-NT A or Pb-EDTA complexes can be readily adsorbed. Adsorbed NTA and EDTA at kaolin surface provide new adsorption sites for Pb(II) ions.	en_US
dc.language.iso	en_US	en_US
dc.publisher	NISCAIR-CSIR, India	en_US
dc.rights	CC Attribution-Noncommercial-No Derivative Works 2.5 India	en_US
dc.source	IJC-A Vol.38A(10) [October 1999]	en_US
dc.title	Influence of organic ligands on kinetics of adsorption of lead(II) by kaolin under various pH conditions	en_US
dc.type	Article	en_US
Appears in Collections:	IJC-A Vol.38A(10) [October 1999]

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