Sorption of Phosphates by Iron (III) Oxyhydrates with Various Crystalline Structures

Authors

  • Тетяна Василівна Ліснича Institute for Sorption and Problems of Endoecology, Ukraine
  • Тетяна Євгеніївна Теріковська Institute for Sorption and Problems of Endoecology,
  • Ольга Петрівна Зикова Institute for Sorption and Problems of Endoecology, Ukraine
  • Тетяна Анатоліївна Ходаковська Institute for Sorption and Problems of Endoecology, Ukraine
  • Наталія Михайлівна Вислогузова Institute for Sorption and Problems of Endoecology, Ukraine
  • Святослав Олександрович Кириллов Institute for Sorption and Problems of Endoecology; Interdepartmental Division of Electrochemical Power Energetic and Engineering, NAS of Ukraine, Ukraine

DOI:

https://doi.org/10.20535/1810-0546.2014.1.26538

Keywords:

Sorption, Phosphates, Precipitation, Iron (III) oxyhydrate

Abstract

By means of precipitation method  (amorphous ferric oxyhydrate), a- (goethite) and g- (lepidocrocite) have been synthesized. Physical-and-chemical parameters of the synthesized compounds have been characterized using X-ray diffraction, porosity studies, pH titration. With the aid of XRD it was found that a- and g- have crystalline structure, while  is amorphous. The sorption affinity of ferric oxyhydrates of various crystalline structure towards phosphate ions has been studied. The synthesized oxyhydrates have a mezoporous structure with the pore size of 2 nm for  (amorphous), g- and 16 nm for a-. рН titration has shown that  (amorphous) is an ampholite with the maximal exchange capacity of 3 mmol/g in acidic media and 3,5 mmol/g in alkaline media. The comparison of the sorption affinity of the ferric oxyhydrates with various crystalline structures towards phosphate ions shows that  (amorphous) has the best parameters, and its sorption capacity reaches 237,5 mg/g in acidic media and 104,5 mg/g in alkaline media.

Author Biographies

Тетяна Василівна Ліснича, Institute for Sorption and Problems of Endoecology

Т.V. Lesnichaya,

candidate of sciences (chemistry), senior research fellow

Тетяна Євгеніївна Теріковська, Institute for Sorption and Problems of Endoecology

Т.Е. Terikovskaya,

candidate of sciences (chemistry), research fellow

Ольга Петрівна Зикова, Institute for Sorption and Problems of Endoecology

О.P. Zykova,

leading engineer

Тетяна Анатоліївна Ходаковська, Institute for Sorption and Problems of Endoecology

Т.А. Khodakovskaya,

leading engineer

Наталія Михайлівна Вислогузова, Institute for Sorption and Problems of Endoecology

N.M. Visloguzova,

junior research fellow

Святослав Олександрович Кириллов, Institute for Sorption and Problems of Endoecology; Interdepartmental Division of Electrochemical Power Energetic and Engineering, NAS of Ukraine

S.А. Kirillov,

doctor of chemistry, assistant director of Interdepartmental Division of Electrochemical PowerEnergetic and Engineering, NAS of Ukraine, chief research fellow at the Institute for Sorption and Problems of Endoecology

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Published

2014-02-24

Issue

No. 1 (2014): Engineering

Section

Art

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