Abstract
A novel biosorbent is prepared by coupling a cibacron blue to yeast cells. The chemically modified yeast cells with mentioned ligand has been characterized by Fourier transform infrared spectroscopy and elemental analysis and applied for the preconcentration and extraction of trace Ni(II) from water samples. The optimum pH value for sorption of the nickel ions was 8. The sorption capacity of yeast cells- cibacron blue is 12.2 mg. g−1. A recovery of 91.4% was obtained for Ni(II) when eluted with 0.5 M HCl/HNO3 (3:1). The equilibrium data of Ni(II) adsorption on yeast cells- cibacron blue was analyzed using Langmuir model. The method was applied for Ni(II) determination in sea water sample.
Highlights
Heavy metals such as lead, cobalt, cadmium, mercury and nickel are attended due to toxicity and influences on human body and environment
The bands at 3433 cm-1 (O-H), 2919 cm−1 and 1697 cm−1 (C=O stretching) for yeast cell-cibacron blue (YC-CB) indicated that modification was done successfully
The results demonstrated that the percentage of nitrogen was increased in YC-CB rather than bared cells that confirmed immobilization of cibacron blue onto yeast cells wall
Summary
Heavy metals such as lead, cobalt, cadmium, mercury and nickel are attended due to toxicity and influences on human body and environment. For this reason investigation about pollution of these elements are quite important [1]. Trace nickel can be preserved on the surface of yeast cell- cibacron blue and desorbed with 0.5 M mixture of nitric and hydrochloric acid (3:1) preceding the determination by FAAS. This proposed novel method has advantages of good accuracy and precision, high recovery, and preconcentration factor
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