Compatible Adsorption of Strontium and Zinc Ions as Well as Vitamins on Zeolites

Abstract

Adsorbents based on natural Sokyrnytsky clinoptilolite have been prepared by treating the base sorbent with aqueous solutions of different salts or acids (HCl, NH 4 OH or NaCl). The separate adsorption of Zr 2+ and Sr 2+ ions and of vitamin B 1 together with the joint adsorption of Sr 2+ ions and vitamin B 1 has been investigated on the prepared samples. The adsorption isotherms of the cations were studied both against concentration and time, when superposition of the adsorption and desorption curves was observed. This suggests the possibility of using such adsorbents for the isolation of heavy metal ions from human organisms without simultaneous loss of vitamin B 1 .

Effect of the Feed Additive Clinoptilolite (ZeoFeed) on Nutrient Metabolism and Production Performance of Laying Hens

“…in pigs (Papaioannou et al 2002) or in poultry (Elliot and Edwards 1991;Watkins and Southern 1991;Gezen et al 2004;Desheng et al 2005). The use of feed additives had no negative effect on biological efficiency of certain vitamins as demonstrated by Edwards et al (1992) for vitamin D3 and by Gomonaj et al (2000) for vitamin B1.…”

Study of secondary porosity by SAXS and N2 adsorption in composite materials obtained from a Cuban natural clinoptilolite

“…All the samples possess inverted S‐shaped isotherm curves form, corresponding to N 2 adsorption isotherms type IV, according to International Union of Pure and Applied Chemistry (IUPAC) classification 42 . The hysteresis loops are type H3, characteristic of the presence of slit‐shaped pores that correspond to the interparticle space 43,44 …”

Adsorption of Lead(II) Ions on Transcarpathian Clinoptilolite

“…For these reasons, the development of methods for removing lead compounds from the ground and from sources of potable water is important. Previous work has shown that Transcarpathian zeolite as well as mordenite can be used successfully for removing heavy metal ions from water (Gomonaj et al 1999;Poliakov et al 1997), radionuclides (Gomonaj et al 2000), organic and et al 1998;Tarasevich et al 1979). Similar investigations have been carried out on zeolitic materials obtained from other regions (Lee et al 1999;Petruzzelli et al 1999).…”

“…Previous work has shown that Transcarpathian zeolite as well as mordenite can be used successfully for removing heavy metal ions from water (Gomonaj et al 1999;Poliakov et al 1997), radionuclides (Gomonaj et al 2000), organic and † First presented at the 5th Ukrainian-Polish Symposium on Theoretical and Experimental Studies of Interfacial Phenomena and their Technological Applications, Odessa, Ukraine, 4-9 September 2000. *Author to whom all correspondence should be addressed.…”