Journal of
Environmental Chemistry and Ecotoxicology

  • Abbreviation: J. Environ. Chem. Ecotoxicol.
  • Language: English
  • ISSN: 2141-226X
  • DOI: 10.5897/JECE
  • Start Year: 2009
  • Published Articles: 197

Full Length Research Paper

Preconcentration and separation of some heavy metal ions by solid-phase extraction using silica modified with zirconium phosphate

M. A. Hamed1*, Kh. S. Abou El-Sherbini2, Y. A. Soliman1, M. S. El-Deek1, M. M. Emara3 and M. A. El-Sawy1
  1National Institute of Oceanography and Fisheries, Red Sea branch, Egypt. 2Department of Inorganic Chemistry, National Research Center, Dokki, Giza, Egypt. 3Department of Chemistry, Faculty of Science, Al-Azhar University Egypt.
Email: [email protected]

  •  Accepted: 14 June 2011
  •  Published: 22 September 2011



An analytical method was developed for the separation and preconcentration of Cu2+, Zn2+, Pb2+, Cd2+, Ni2+ and Fe3+ from surface water samples collected from ten locations at Suez Gulf, using silica gel chemically modified with zirconium (IV) phosphate. The effects of pH value, time of stirring, concentration of eluting acids and some common ionic species on the separation and preconcentration of the investigated metal ions in synthetic aqueous solutions were firstly studied. The results indicate that the optimum conditions for separation are pH = 5.0- 5.5 and time of stirring = 30 min. HNO3 is better eluent for the investigated metal ions than HCl hence 2M HNO3 was used as an eluent. Citrate and EDTA severely affect on the recovery of the metal ions therefore the water samples were previously oxidized to digest organic matter prior to the application process.


Key words: Separation, preconcentration, modified silica, metals, water.