A sensing behavior synergistic liquid-liquid extraction and spectrophotometric determination of nickel(II) by using 1-(2’,4’-dinitro aminophenyl)-4,4,6-trimethyl-1,4-dihydropyrimidine-2-thiol: Analysis of foundry and electroless nickel plating waste water
Creators: name: Kamble, Ganesh S.
name: Joshi, Sunil S.
name: Kokare, Arjun N.
name: Zanje, Sunil B.
name: Kolekar, Sanjay S.
name: Ghule, Anil V.
name: Shashikant H. Gaikwad
name: Mansing A. Anuse
Publisher: name: Taylor & Francis
Year: 2016
Subjects: subject: Biophysics
subject: Biochemistry
subject: Cell Biology
subject: Pharmacology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: FOS: Biological sciences

description: We report the sensing behavior liquid-liquid extraction of nickel(II) which have been selectively determined from contaminated water samples by simple Uv-visible spectrophotometer. The method is based on synergistic extraction of nickel(II) by 1-(2’,4’-dinitro aminophenyl)-4,4,6-trimethyl-1,4-dihydropyrimidine-2-thiol, [2’,4’-dinitro APTPT] with pyridine. Nickel(II) reacts with 2’,4’-dinitro APTPT and forms a green coloured complex at pH 9.2. Also, the Ni(II) ion were detected through naked-eye with the ligand. The absorbance of coloured complex was measured at 660 nm and coloured complex is stable for more than 48 h even in the presence of other competing ions. The system obeyed Beer’s law in the concentration range of 5 to 50 μg mL<sup>−1</sup> of nickel(II) and optimum range evaluated by Ringbom’s plot method is 10 to 40 μg mL<sup>−1</sup> with an excellent linearity and a correlation coefficient of 0.999. The molar absorptivity and Sandell’s sensitivity of the extractive species were found to be 1.64 x 10<sup>3</sup> dm<sup>3</sup> mol<sup>−1</sup> cm<sup>−1</sup> and 0.0585 μg cm<sup>−2</sup> in presence of pyridine, and 7.4 x 10<sup>2</sup> dm<sup>3</sup> mol<sup>−1</sup> cm<sup>−1</sup> and 0.78 μg cm<sup>−2</sup> in absence of pyridine, respectively. The composition of nickel(II)-2’,4’-dinitro APTPT-pyridine was established by slope ratio method, mole ratio method and Job’s method of continuous variation. It was found that Metal:Ligand:Synergent (M:L:Sy) ratio is 1:2:2. To assess precision and accuracy of the developed method, determinations were carried out at n = 5. The relative standard deviation of all measurements does not exceed 0.16 %. Excellent selectivity was found toward Ni(II) ion due to a specific complex formation between Ni(II) ion and organic ligand. In the extraction of Ni(II), several affecting factors, including the solution pH, ligand concentration, equilibrium time, initial Ni(II) ion concentration, foreign ions were investigated and applicability of the method checked by the analysis of synthetic mixtures and alloys. The developed method is successfully used for determination of nickel(II) from waste water effluents from foundry region and nickel plating industry (Kolhapur city). Results obtained by the developed method also confirmed by AAS. We claimed from this study that Ni(II) could be successfully determined by the spectrophotometric method developed in the current work. The present work is obviously much simpler than the conventional comprising multistep processes.