Removal of Zn2+, Fe2+, Cu2+, Pb 2+, Cd2+, Ni2+ and Co2+ ions from aqueous solutions using modified phosphate dolomite

A. I. Ivanets, N. V. Kitikova, I. L. Shashkova, O. V. Oleksiienko, I. Levchuk, M. Sillanpää

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)

Abstract

In the present work, modification of phosphate dolomite was conducted and applied for some bivalent metal ions removal. Physico-chemical properties of sorbent were characterized by means of X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), differential-thermal analysis (DTA), thermogravimetric analysis (TGA), scanning electron microscopy (SEM) and low temperature adsorption-desorption of nitrogen. Sorption properties of modified dolomite for Zn2+, Fe2+, Cu2+, Pb2+, Cd2+, Ni2+ and Co2+ removal were studied using model solutions. The highest removal efficiency was observed in pH range from 2 to 5. Among all tested metals, highest adsorption capacity of phosphated dolomite was detected towards Co2+ and Pb2+ (15 and 12 mmol g-1, respectively) and the lowest towards Zn2+, Fe2+ and Cu2+ (about 8 mmol g-1). Adsorption isotherms were built for each tested metal ions and were fitted to Langmuir, Freundlich and Redlich-Peterson models.

Original languageEnglish
Pages (from-to)981-987
Number of pages7
JournalJournal of Environmental Chemical Engineering
Volume2
Issue number2
DOIs
Publication statusPublished - Jun 2014
Externally publishedYes

Keywords

  • Adsorption
  • Isotherms
  • Metal ions
  • Phosphate dolomite

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Waste Management and Disposal
  • Pollution
  • Process Chemistry and Technology

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