Removal of Heavy Metals from Aqueous Solution using Clinoptilolite and Stilbite

Golomeova, Mirjana and Zendelska, Afrodita and Blažev, Krsto and Krstev, Boris and Golomeov, Blagoj (2014) Removal of Heavy Metals from Aqueous Solution using Clinoptilolite and Stilbite. International Journal of Engineering Research & Technology, 3 (11). pp. 1029-1035. ISSN 2278-0181

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Heavy metals are highly toxic and they must be removed from the polluted streams. Аdsorption by zeolites is currently considered to be very suitable for wastewater treatment because of its simplicity and cost effectiveness. The aim of this investigation was to compare adsorption efficiency of heavy metals (Cu, Zn, Mn and Pb) from aqueous solution using two different types of natural zeolite: clinoptilolite from Bulgaria and stilbite from Macedonia. The obtained information will be basis for further research for acid mine drainage treatment with zeolite. The adsorption of Cu, Zn, Mn and Pb from aqueous solution using clinoptilolite and stilbite is effective. Copper and zinc ions are better adsorbed using stilbite, manganese ion is better adsorbed using clinoptilolite as adsorbent and for lead ion a both of used adsorbent gave a similar results. According to the maximum adsorption capacity (qe) was determine the selectivity of clinoptilolite and stilbite, for the respective heavy metal ions. The selectivity series obtained about clinoptilolite was: Pb2+ > Cu2+ > Zn2+ > Mn2+, and about stilbite was Pb2+ > Cu2+ > Zn2+ > Mn2+. From the kinetic modelling, the pseudo-second order kinetic model gave a better fits than pseudo-first order kinetic model for adsorption of Cu, Zn, Mn and Pb onto clinoptilolite and stilbite.

Item Type: Article
Subjects: Engineering and Technology > Chemical engineering
Engineering and Technology > Environmental engineering
Engineering and Technology > Materials engineering
Divisions: Faculty of Natural and Technical Sciences
Depositing User: Afrodita Zendelska
Date Deposited: 25 Nov 2014 10:22
Last Modified: 25 Nov 2014 10:22

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