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- Title
ADSORPTION OF Fe(II) AND Zn(II) IONS FROM LANDFILL LEACHATE BY NATURAL BENTONITE.
- Authors
Atkovska, Katerina; Bliznakovska, Blagica; Ruseska, Gordana; Bogoevski, Slobodan; Boskovski, Bosko; Grozdanov, Anita
- Abstract
Due to its typical layered silicate structure, large specific surface area, chemical and mechanical stability, high cation exchange capacity, bentonite has been widely used as heavy metals adsorbent from aqueous solutions. This paper reports data referring to the adsorptive properties of natural bentonite from Kriva Palanka, Republic of Macedonia, in view of its possible application to Fe(II) and Zn(II) ions removal from landfill leachate. The raw material was characterized in terms of its chemical composition and structural morphology (XRD, FTIR, TGA-DTA), as well as its specific surface area and particle size distribution. Montmorillonite was considered the phase prevailing. The specific surface area of 219 m2 g-1was evaluated on the ground of the results obtained in proceeding of water vapor adsorption at 298 K. The batch method has been employed for adsorption experiments. The initial concentration of Fe(II) in the leachate was 9.25 mg dm-3, while that of Zn(II) was a 0.22 mg dm-3. These values as well as those of the concentrations after the adsorption were determined by atomic absorption spectrophotometry (AAS). The Freundlich and the Langmuir adsorption isotherms applied showed a good fit to the experimental data. The monolayer capacity of bentonite in respect to Fe(II) and Zn(II) determined by the Langmuir equation was found equal to 0.4371 mg g-1and 4.1×10-3mg g-1, respectively. The removal efficiency in respect of zinc cations was above 98 %.
- Publication
Journal of Chemical Technology & Metallurgy, 2016, Vol 51, Issue 2, p215
- ISSN
1314-7471
- Publication type
Academic Journal