Investigation of the effect of Calcination on Mg-Fe Hydrotalcite (FeHT)

Abstract

Adsorption is an effective and simple technique for removing contaminants in water. The
development and characterization of the novel adsorbent with high surface area, which is effective for
removal of arsenic from water, was targeted. For this purpose, calcination conditions on the structure of
FeHT, known as LDH was investigated. Fe-Hydrotalcite (FeHT) and calcined Fe-Hydrotalcite (K-FeHT)
were characterized by X-ray diffraction (XRD), thermogravimetry (TGA), differantial scanning
calorimeter (DSC), scanning electron microscopy (SEM), particle size analysis and Brunauer-Emmett-
Teller (BET) spesific surface area analysis. It was observed that the specific surface area of K-FeHT
significantly affected by the calcination temperature and time. As a result of the calcination, H2O, OH and
CO2 contents between the layers were disappeared, and periclase structures was formed. The surface area
was approximately doubled at optimum calcination conditions.

Keywords

• Fe-Hydrotalcite (FeHT),Calcination,Characterization

Project Number

115Z111

Kalsinasyonun Mg-Fe Hidrotalsit (FeHT) Üzerindeki Etkisinin Araştırılması

Abstract

Adsorpsiyon, sularda bulunan kirleticilerin giderilmesinde etkili ve basit bir tekniktir. Bu çalışmada
sularda bulunan kirletici anyonların giderilmesinde kullanılmak üzere yüksek yüzey alanlı özgün bir
adsorbentin geliştirilmesi ve karakterizasyonunun yapılması amaçlanmıştır. Bu doğrultuda çift tabakalı
hidroksit olarak da bilinen Fe-Hidrotalsitin kalsinasyonu incelenmiştir. FeHT ve K-FeHT numuneleri; Xışını
difraktogramı (XRD), termal gravimetrik analiz (TGA), diferansiyel taramalı kalorimetre (DSC),
taramalı elektron mikroskopu (SEM), tane boyut analizi ve Brunauer-Emmett-Teller (BET) yüzey alan
ölçümleri ile karakterize edilmiştir. Kalsine FeHT’nin özgül yüzey alanının kalsinasyon sıcaklığı ve
süresinden etkilendiği gözlemlenmiştir. Kalsinasyon sonucunca tabakalar arasındaki H2O, OH ve CO2
içeriklerinin kaybolarak periklaz yapılarının oluştukları belirlenmiştir. Optimum kalsinasyon şartlarında
FeHT’nin yüzey alanı yaklaşık iki kat arttırılmıştır.

Keywords

• Fe-Hidrotalsit (FeHT),Kalsinasyon,Karakterizasyon

Supporting Institution

TÜBİTAK

Project Number

115Z111

Thanks

Bu çalışma TÜBİTAK tarafından desteklenen 115Z111 no'lu proje kapsamında yapılmıştır. Yazarlar TÜBİTAK’a teşekkürlerini sunar.

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