화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.19, No.6, 1781-1787, November, 2013
DOI10.1016/j.jiec.2013.02.020  Export Citation
Comparison of novel sorbents for preconcentration of metal ions prior to their flame atomic absorption spectrometry determination
M. Ghaedi†, M. Montazerozohori, M. Sajedi1, M. Roosta, M. Nickoosiar Jahromi1, and A. Asghari2
  • Chemistry Department, Yasouj University, Yasouj 75918-74831, Iran
  • 1Chemistry Department, Islamic Azad University, Gachsaran Branch, Gachsaran, Iran
  • 2Department of Chemistry, University of Semnan, Semnan, Iran
E-mail:
In the present study, the efficiency and usability of two sorbents including silver nanoparticles loaded on activated carbon and homemade activated carbon for removal and recoveries of heavy metal ions by solid-phase extractant were investigated. These materials characterization was carried out using different techniques such as SEM, XRD, BET and UV-vis. The analytes such as Zn2+, Cu2+ and Pb2+ ions was enriched onto sorbent and subsequent eluted and determined by flame atomic absorption spectroscopy. The influences of the analytical parameters including pH, type and condition of eluent, adsorption capacities and amount of adsorbent, condition of eluent and sample volume on the metal ions recoveries were optimized. The optimum pH value for the separation of metal ions on these new sorbents was 4. The adsorbed metal ions could be completely eluted by using 10.0 mL 4.0 mol L^(-1) HNO3 solution. The loading of 30 mg of ligand onto 0.6 and 0.1 g of AC and Ag-NP-AC, respectively, make possible quantitative sorption of analytes. The accurate and easy determination of analytes in the presence of high limit of matrices constituent is possible without generation of significant problems. The applicability and accuracy of method were tested by its application for analytes quantification in complicated matrices with recoveries more than 91% and relative standard deviation lower than 5%.
Keywords:Activated carbon;Atomic absorption spectroscopy;Silver nanoparticles loaded activated;Solid phase extraction;Trace metal enrichment
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