Volume No. 6 Issue No.: 3A Page No.: 667-673 Jan-Mar 12

 

ECO FRIENDLY ANALYSIS AND SPECTROPHOTOMETRIC STUDIES ON THE REACTION OF DIOXOURANIUM (VI) WITH 2-HYDROXY-4-CHLORO-5- METHYLACETOPHENONE OXIME AND 2-HYDROXY-4-CHLORO-5- METHYLBENZOPHENONE OXIME

 

Punita S. Bharadwaj

Department of Chemistry , J.P Arts and Science College, Bharuch , Gujarat (INDIA)

 

Received on : November 10, 2011

 

ABSTRACT

 

Naturally occurring U(VI) forms highly soluble complexes at alkaline pH. This leads to an increase in the mobility and availability of uranium to ground water and soil which leads to health hazards. U(VI) has tendency to form complexes with various organic chelating agents. Orange yellow complexes of U(VI) with HCMAOX and HCMBOX have been studied spectrophotometrically in water ethanol medium at pH 10 and 10.5 respectively. The effects of pH, time, addition of reagents and diverse ions have been stud- ied . The composition of the complexes comes out to be 1:2 (Metal :Ligand) which has been confirmed by continuous variation , the mole ratio and the slope ratio methods . Beer's law is obeyed up to 47.6 ppm of U(VI) with both the reagents. The molar absorptivity of the complexes are 2.07× 103 and 1.81×103 lit/mole/cm. The stability constants of the complexes are 3.27×105 and 7.15×105 respectively. The IR spectral and magnetic studies indicates that both ligands are bidentate and coordination takes place by formation of M-O and M← N bonds through the oxygen of phenolic group and nitrogen of oxime group with metal. New research has been carried out for extracting U(VI) from sea water using different ligands.

 

Keywords : 2-Hydroxy-4-Chloro-5-Methylacetophenone oxime, 2-Hydroxy-4-Chloro-5- Methylbenzophenone oxime, Chealating agents, Absorptivity, Complexes

 

 

BACK