Yasemen KALPAKLI, Şilan EKİNCİ, Dilan ERTAŞ

H2SO4 İle Aktive Edilen Keşan Yöresi Bentonitinin Di Azo Boyar Madde Bazik Sarı 28 Denge Adsorpsiyonu Karakteristiklerinin İncelenmesi

Bu çalışmada Keşan yöresi asit aktive Ca-Bentoniti adsorbant olarak kullanılmıştır. Tekstil, kozmetik, gıda, kâğıt, halı ve plastik gibi endüstri alanlarında geniş çapta kullanımı olan boyar maddelerden di azo kromorf yapısına sahip Bazik Sarı 28’in (BY28) adsorpsiyon karakteristiği incelenmiştir. Adsorpsiyon üzerinde doğrudan etkili pH, adsorbant miktarı, denge zamanı ve başlangıç konsantrasyonu gibi koşullar BY28 adsorpsiyonu için optimize edilmiştir. Denge adsorpsiyon koşulları olarak pH= 6, 0,05 g adsorbant miktarı ve denge zamanı olarak 40 dakika elde edilmiştir. Denge adsorpsiyon koşullarında elde edilen deneysel sonuçlar lineerleştirilmiş Langmuir modeli (R2=0,9987), Freundlich modeli (R2=0,8887) ve Dubinin-Radushkevich (D-R) (R2=0,5594) karşılaştırılarak yorumlanmıştır. Keşan yöresine ait asit aktive Ca-bentonitin tek tabaka adsorpsiyon kapasitesi 116,3 mg/g olarak elde edilmiştir. 25 °C denemeler için Gibbs serbest enerjisi (ΔGo) hesaplanmış ve BY28’in asit aktive bentonit üzerine adsorpsiyon mekanizmasının istemli bir reaksiyon olduğu sonucuna varılmıştır.

Anahtar Kelimeler:

BY 28, asit aktive bentonit, adsorpsiyon

Investigation of Equilibrium Adsorption Characteristics of Di Azo Dyes Basic Yellow 28 of H2SO4 Activated Kesan Region Bentonite

In this study, acid activated Ca-Bentonite of Keşan region was used as adsorbent. Adsorption characteristics of Basic Yellow 28 (BY28) which has di azo chromorph structure, which is widely used in industry such as textile, cosmetics, food, paper, carpet, and plastic were investigated in batch system. Conditions such as pH, adsorbent amount, equilibrium time, and initial concentration which are directly effective on adsorption were optimized for BY28 adsorption. pH = 6, 0.05 g adsorbent amount and 40 minutes of equilibrium time were obtained as equilibrium adsorption conditions. Experimental results obtained under equilibrium adsorption conditions were interpreted by comparing linearized Langmuir model (R2 = 0.9987), Freundlich model (R2 = 0.8887), and Dubinin-Radushkevich (D-R) (R2 = 0.5594). The single layer adsorption capacity of acid activated Ca-bentonite of Keşan region was obtained as 116.3 mg / g. Gibbs free energy (ΔGo) was calculated for experiments at 25 ° C and it was concluded that the adsorption mechanism of BY28 on acid activated bentonite is a voluntary reaction.

Keywords:

Basic Yellow 28, acid activated bentonite, adsorption,

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