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http://hdl.handle.net/20.500.12358/26353
Title | Extraction and preconcentration capacity of bifunctionalized diamine-thiol polysiloxane immobilized ligand system towards some divalent cations |
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Untitled | |
Abstract |
Porous solid bi-organofunctionalized diamine-thiol polysiloxane immobilized ligand system of the general formula P-(CH2)3- X, (where P represents [Si-O]n siloxane network and X represents a mixture of diamine; -NH(CH)2NH2 and thiol; -SH functional groups) has been prepared by hydrolytic polycondensation of TEOS with a mixture of 3-mercaptopropyltrimethoxysilane and 3- (2-aminoethylimino)propyltrimethoxysilane agents. The ligand system was evaluated for extraction and preconcentartion of a series of divalent metal ions from aqueous solutions including: Co2+, Ni2+, Cu2+, Zn2+, Cd2+ and Pb2+. Both batch and dynamic methods were used to examine maximum sorption capacity. The maximum binding capacity followed the sequence; Cu2+ > Pb2+ > Cd2+ > Ni2+ > Zn2+ > Co2+ at pH 5.5. Measurement of variation of sorption of metal ions with temperature yielded negative values of ΔG° and … |
Authors | |
Type | Journal Article |
Date | 2009 |
Published in | Journal of the Iranian Chemical Society |
Series | Volume: 6, Number: 4 |
Publisher | Springer-Verlag |
Citation | |
Item link | Item Link |
License | ![]() |
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Files in this item | ||
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El-Ashgar, Nizam M._27.pdf | 180.3Kb |