As sensitive application method of solvent extraction used onium system for extraction Zinc ion Zn2+ from acidic
aqueous solution of HCl as oxonium species by used Methyl Stearate ester as sensitive extract ant dissolved in chloroform
at 1×10-3molar concentration, the study show extracted species giving maximum absorbance at wave length λmax =275nm
in presence 1M HCl with shaking time equal to 25 min. so that the study appear extraction efficiency differ with organic
extract ant used whereas 2,4-Dimethyl -3- pentanone giving higher extraction efficiency ,electrolyte effect study show
there is enhancement in extraction efficiency in presence electrolyte salt in aqueous solution as well as foundation 30%
methanol in aqueous solution effect to increase extraction efficiency. Thermodynamic study appear the extraction behavior
was endothermic giving maximum increasing in extraction at 40°C with thermodynamic data ΔHex =0.068 kJ.mol-1 and
ΔGex= -53.95 kJ.mol-1 ΔSex= 172.58 J.mol-1.K-1 .The study included also organic solvent effect and spectrophotometric
determination of Zn2+ in different samples by used calibration curve appear good linearity from (1-10) ppm and molar
absorptivity ε=7861.45L.mol-1.cm-1, RSD% (n=3)=0.00545 and standard deviation=0.0728, Sandal’s sensitivity=
0.00832μg.cm-2.
تاريخ النشر
01/08/2016
الناشر
BEST: Journal of Humanities, Arts, Medicine and Sciences
أ.د.شوكت كاظم جواد | Prof. Dr.Shawket Kadhim Jawad | 4546