Investigation of Adsorption Characteristic of Basic Blue 41 (BB41) onto Raw Kütahya Ca-Bentonite

Abstract

The objective of this research concerns the adsorption characteristic of the cationic azo dye namely Basic Blue 41(BB41) from aqueous solution was investigated on raw Kütahya Ca-Bentonite. In batch configuration, the effects of experimental parameters, such as contact time (0–300 min.), pH (3−8), Ca-Bentonite dose (0.01–0.1 g) and initial dye concentration (40–100 mg L−1) on the removal efficiency were studied. Optimum conditions from experimentally data, to be concentration of 40 mg L-1, pH: 4.0, contact time: 90 min. and amount of adsorbent to be 0.02 g were obtained. Two parameter (Freundlich, Langmuir and Dubinin-Radushkevich) adsorption isotherm models were applied on obtained experimental result and the model constant were calculated. The best equilibrium model was chosen based on the linear square regression correlation coefficient, R2. The experimental data for the adsorption equilibrium of BB41 has been interpreted with the linearized Langmuir model (R2~1) compared to Freundlich one (R2=0.9333). Maximum adsorption capacity of bentonite was obtained 119.4 mg g-1.

Keywords

• Adsorption,bentonite,dye removal,adsorption isotherms,Blue Basic41

İşlem Görmemiş Kütahya Ca-Bentonitinin Bazik Mavi 41 (BB41) Adsorpsiyon Karakteristiğinin İncelenmesi

Abstract

Bu araştırmanın amacı, katyonik azo boyar madde olan ve Bazik Mavi 41 (BB41) olarak isimlendirilen boyar maddenin sulu çözeltilerden işlem görmemiş Kütahya Ca-Bentoniti üzerine adsorpsiyon karakteristiğinin incelenmesidir. Kesikli çalışma yöntemiyle, temas süresi (0-300dak.), pH (3-8), Ca−Bentonit dozu (0.01-0.1 g) ve başlangıç boya konsantrasyonu (40-100 mg L-1) gibi deneysel parametrelerin giderim verimi üzerindeki etkileri çalışılmıştır. Deneysel verilerden optimum koşullar, 40 (mg L-1) başlangıç konsantrasyonu için; pH:4.0, temas süresi: 90 dak. ve 0.02 g adsorbant miktarı olarak elde edilmiştir. İki parametreli adsorpsiyon izoterm modelleri (Freundlich, Langmuir ve Dubinin-Radushkevich) deneysel olarak elde edilen sonuçlara uygulanıp model sabitleri hesaplanmıştır. En iyi denge modeli lineer regresyon korelasyon katsayısı, R2’ye bağlı olarak seçilmiştir. BB41’in denge adsorpsiyonu için elde edilen deneysel veriler lineerleştirilmiş Langmuir modeli (R2~1) ile Freundlich modeli (R2=0.9333) karşılaştırılarak yorumlanmıştır. Bentonitin maksimum adsorpsiyon kapasitesi 119.4 mg g-1 olarak elde edilmiştir.

Keywords

• Adsorpsiyon,bentonit,boyar madde giderimi,adsorpsiyon izotermleri,Bazik Mavi 41

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