Metal recovery and preconcentration by aminopolycarboxylic acid modified silica surfaces

Eveliina Repo, Jolanta K. Warchoł, Mika Sillanpää

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


This study focuses on the adsorption and preconcentration of various metals by silica gel surfaces modified with aminopolycarboxylic acids namely ethylenediaminetetraacetic acid or diethylenetriamine-pentaacetic acid. The adsorption performance of the studied materials was determined in mixed metal solutions and the adsorption isotherm studies were conducted for cobalt, nickel, cadmium, and lead. The results were modeled using various theoretical isotherm equations, which suggested that two different adsorption sites were involved in metal removal although lead showed clearly different adsorption behavior attributed to its lowest hydration tendency. Efficient regeneration of the adsorbents and preconcentration of metals was conducted with nitric acid. Results indicated that the metals under study could be analyzed rather accurately after preconcentration from both pure, saline and ground water samples.

Original languageEnglish
Pages (from-to)89-100
Number of pages12
JournalJournal of Sustainable Development of Energy, Water and Environment Systems
Issue number1
Publication statusPublished - Mar 2017
Externally publishedYes


  • Adsorption
  • Metal analysis
  • Metal removal
  • Preconcentration
  • Salt water
  • Water treatment

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Environmental Science (miscellaneous)
  • Water Science and Technology
  • Energy Engineering and Power Technology


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