A novel method for the simple and simultaneous preconcentration of Pb~(2+), Cu~(2+)and Zn~(2+) ions with aid of diethylenetriamine functionalized SBA-15 nanoporous silica compound

摘要

A rapid method for the extraction and monitoring of nanogram level of Pb~(2+), Cu~(2+)and Zn~(2+) ions using uniform silanized mesopor (SBA-15) functionalized with diethylenetriamine groups and flame atomic absorption spectrometry (FAAS) is presented. The preconcentration factor of the method is 100 and detection limit of the technique is 5.5ngmL~(-1) and 1.4ngmL~(-1) and 0.1ngmL~(-1) for Pb~(2+), Cu~(2+) and Zn~(2+) respectively. The time and the optimum amount of the sorbent, pH and minimum amount of acid for stripping of ions from functionalized SBA-15 were tested. The maximum capacity the functionalized SBA-15 was found to be 183.0 (±1.9) ug, 156.0 (±1.5) ug and 80.0 (±1.6) ug of Pb~(2+), Cu~(2+) and Zn~(2+)/mg functionalized SBA-15, respectively.