Efficacy of a new tan doped sol-gel sorbent for uptake of zinc
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Summary
A TAN (1-(2-Thiazolylazo)-2-naphthol)) doped sol gel silica sorbent (reddish colour, porous, stable, hard, non- swelling) were prepared and investigated for the removal of Zn (II) from aqueous solutions. The kinetics, adsorption isotherm, equilibration time and pH effect on the removal were studied from non competitive aqueous solution to optimize the conditions to be utilized on a large scale. Fast equilibration was observed and adsorption equilibria were reached within 30minutes. Adsorption of zinc ions on the blank (un-doped) sol gel was found negligible. The maximum adsorption of Zn (II) ions onto the TAN doped sol-gel from single solutions were 2.33mg/g (0.035mmol/g). TAN doped sol gel can be regenerated through washing with a solution of 0.1M HCl solution. The maximum regeneration value was as high as 99.0. The TAN-doped sol gel silica is suitable at least for four adsorption-desorption cycles without experiencing considerable loss of adsorption capacity. The uptake route and the nature of the Zn-TAN complex have been discussed.
© 2003 Oldenbourg Wissenschaftsverlag GmbH
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Articles in the same Issue
- Determination of binary data for neptunium(V) nitrate
- Pu-Th separation studies employing di(2-ethylhexyl)isobutyramide (D2EHIBA) as extractant from nitric acid medium
- New laser induced photoacoustic signal measurement method. Example of application: Identification of the uranium(IV)-dioxalato complex in solution
- Complex formation between uranium(VI) and α-D-glucose 1-phosphate
- Neptunium and plutonium sorption to Snake River Plain, Idaho soil
- Disequilibria in the disintegration series of U and Th and chemical parameters in thermal spring waters from the Tatun volcanic area (Taiwan)
- Comparative study on the evaluation of gamma-dose rate above uranium mineralisation areas in Western Sudan
- Efficacy of a new tan doped sol-gel sorbent for uptake of zinc
- Electrochemical dissolution of simulated "white inclusions" in nitric acid. Linear voltammetry study with Mo, Re, Ru metals and their alloys electrodes
- Direct labeling studies of octapeptides with rhenium-188
