Extraction of heavy metals by amines adsorbed onto silica gel.
Previous work has established the possibility of using known coordinating agents supported on silica gel in the removal of heavy metals such as lead, copper, cadmium, and nickel from aqueous media. Functionalized silica gel has been used in the removal of heavy metals with notable success. Silica gel is currently being used as a support for various monofunctional aliphatic amines as coordinating ligands. The current study reports the results of an investigation involving the use of saturated, straight chain primary amines as coordinating ligands in the removal of copper(II), cadmium(II), lead(II), nickel(II), and silver(I) ions from aqueous solutions of known concentration. Primary amines used in this investigation were n-butylamine, n-hexylamine, n-octylamine, n-decylamine, and n-hexadecylamine.
Bowe
Craig A
CA
Institute for Environmental Studies, Department of Chemistry, University of South Florida, Tampa, Florida 33620, USA.
Pooré
Duke D
DD
Benson
Robert F
RF
Martin
Dean F
DF
D000327:Adsorption; D000588:Amines / Q000737:chemistry*; D005782:Gels; D007164:Immunosorbents; D019216:Metals, Heavy / Q000737:chemistry* / Q000302:isolation & purification*; D058428:Silica Gel; D012822:Silicon Dioxide; D018508:Water Purification / Q000379:methods*
D000588:Amines; D005782:Gels; D007164:Immunosorbents; D019216:Metals, Heavy; D058428:Silica Gel; D012822:Silicon Dioxide