alexa DETERMINATION OF PRECIPITATION LIMIT OF Zn (II) ION WITH 2-AMINO-4- CARBAMOYLBUTANOIC ACID


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Research Article

DETERMINATION OF PRECIPITATION LIMIT OF Zn (II) ION WITH 2-AMINO-4- CARBAMOYLBUTANOIC ACID

Fatmir Faiku1* and Haxhere Faiku2
  1. Department of Chemistry, Faculty of Natural Sciences, University of Prishtina, Mother Teresa Street 5, 10000 Prishtina, Kosova
  2. Department of Natural Science, Association Loyola Gymnasium, Ring Rout, 20000 Prizren, Kosova
Corresponding Author: Fatmir Faiku, E-mail: [email protected]
Received: 17 May 2013 Accepted: 29 May 2013
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Abstract

The goal of this research was to investigate the condition for removing of Zn cation from water, through precipitation method with 2-Amino-4-carbamoylbutanoic acid as ligand. In this study we examined the precipitation of Zn (II) ion in water solutions of ZnSO4 x 7H2O (3x10-3 mol L-1, 5x10-4 mol L-1 and 1x10-4 mol L-1) with 2-Amino-4-carbamoylbutanoic acid (1x10-1 mol L-1, 1x10-2 mol L-1 , 1x10-3 mol L-1 and 1x10-4 mol L-1) in constant ionic strength of 0.6 mol L-1 NaCl. We have determined the concentration region at which Zn (II) start to precipitate. From precipitation diagrams of zinc with 2-Amino-4-carbamoylbutanoic acid in ionic force 0.6 mol L-1 NaCl, we have found that during decreasing the concentration 2-Amino-4- carbamoylbutanoic acid in case of constant concentration of Zn (II) the limit of precipitation is shifted to lower values of pH. Also from precipitation diagrams we can see that when the concentration of zinc decreasing, in case of constant concentration of 2-Amino-4-carbamoylbutanoic acid the limit of precipitation will shift at lower values of pH. From the IR spectroscopic analysis we can conclude that Zn (II) ion can precipitate with 2- Amino-4-carbamoylbutanoic acid.

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