ADSORPTION OF Fe2+ IONS WITH Saccharomyces cerevisiae IMMOBILIZED PUMICE STONE

Yıl 2005, Cilt: 18 Sayı: 3, 365 - 373, 13.08.2010

Mustafa Lale Nazan Şahin Zülfikar Temoçin

Öz

 ABSTRACT

In this study, the adsorption conditions of Fe2+ ions on Saccharomyces cerevisae immobilized pumice stone were investigated by column method. In order to perform this aim, the effect of solution pH value, initial concentration of ions and suitable solution and concentration for recovery of adsorbed ions were investigated.At pH 5, the maximum adsorption was obtained. At optimal pH value, adsorption capacity of sorbent for metal was obtained as 1,81 mg.g-1, when initial concentration was 60 mg.ml-1. Influence of HCl, NaCl, NH4Cl and EDTA solutions on desorption were investigated and maximum recovery was achieved by 0,2M EDTA solution. Desorption were 98% level provided by 0,2 M EDTA solution.

Anahtar Kelimeler

Key Words: Adsorption, Saccharomyces cerevisiae, Pumice stone, Immobilization

Fe2+ İYONLARININ Saccharomyces cerevisiae İMMOBİLİZE EDİLMİŞ PONZA TAŞI İLE ADSORPSİYONU

Öz

Bu çalışmada kolon yöntemi kullanılarak Fe2+ iyonlarının Saccharomyces cerevisiae immobilize edilmiş ponza taşına adsorpsiyon şartları araştırıldı. Bu amaçla; adsorpsiyona çözelti pH sının, iyon başlangıç derişiminin ve adsorplanan iyonların geri kazanılması için uygun çözelti türü ve derişiminin etkisi araştırıldı. Maksimum adsorpsiyonun sağlandığı pH değerinin 5 olduğu belirlendi. Optimum pH değerinde, adsorbanın metal tutma kapasitesi 60 µg/mL başlangıç derişiminde 1,81mg/g dır. Desorpsiyona HCl, NaCl, NH4Cl ve EDTA çözeltilerinin etkisi araştırıldı. En uygun çözeltinin 0,2 M’lık EDTA çözeltisi olduğu gözlendi. 0,2 M EDTA çözeltisi ile %98 oranında desorpsiyon sağlandı

Anahtar Kelimeler

Adsorpsiyon, Saccharomyces cerevisiae, Ponza taşı, İmmobilizasyon

Kaynakça

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