Investigation on the chemical bonding of copper ions on different soil samples

Edit Marosits, K. Polyák, J. Hlavay

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The mobility and bioavailability of heavy metals depend heavily on their physical and chemical forms and their interactions with the different soil phases. Sorption capacity of different soils (brown forest, carbonaceous sandy, calcareous chernozjom) using Cu2+ as a model ion was studied. The time of the equilibrium between solid and liquid phases was determined as 48 h. The optimum initial pH-range was found as pH 3.5-6 and it was very much dependent on the soil types. From the pH changes taken place during the equilibrium process it was concluded that either protons or hydroxyl ions were released into the solution. The study of effect of ion strength on the adsorption of metal ions has concluded that the Na-ions showed two different effects, namely they decreased the adsorption of Cu2+-ions by occupying the sorption sites and, on the other hand, the Na-ions considerably destroyed the mineral phases of the soils and increased the adsorption capacity. The effect of changes of the concentration on the adsorption process was investigated in the range of 1-10 mmol/l initial concentration using the optimum pH values. The linear Langmuir isotherm fitted into the initial parts of the adsorption isotherms for 1-4.5 mmol/l Cu2+-ions.

Original languageEnglish
Pages (from-to)219-226
Number of pages8
JournalMicrochemical Journal
Volume67
Issue number1-3
DOIs
Publication statusPublished - 2000

Fingerprint

Copper
Ions
Soils
Adsorption
Sorption
Heavy Metals
Adsorption isotherms
Minerals
Metal ions
Isotherms
Protons
Liquids

Keywords

  • Cu ions
  • Langmuir isotherm
  • Soils

ASJC Scopus subject areas

  • Analytical Chemistry
  • Spectroscopy

Cite this

Investigation on the chemical bonding of copper ions on different soil samples. / Marosits, Edit; Polyák, K.; Hlavay, J.

In: Microchemical Journal, Vol. 67, No. 1-3, 2000, p. 219-226.

Research output: Contribution to journalArticle

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