Sulu Çözeltiden Remazol Brilliant Blue R Gideriminde Kaolin Destekli Nano Boyutlu Sıfır Değerlikli Demir Kullanımı

Öz

Bu çalışmada, kaolin destekli nano boyutlu sıfır değerlikli demir (K-nZVI) partikülleri kaolin varlığında borhidrür indirgeme metodu ile sentezlenmiş ve sulu çözeltiden Remazol Brilliant Blue R (RBBR) gideriminde kullanılmıştır. RBBR gideriminde çözelti başlangıç pH’ı, K-nZVI dozajı, temas süresi ve başlangıç boyar madde konsantrasyonunun etkisi değerlendirilmiştir. Giderim veriminin pH’a bağlı olduğu tespit edilmiş ve RBBR’nin maksimum giderim verimi pH 3’te gerçekleşmiştir. 0.3-1.0 g L-1 dozaj aralığında K-nZVI dozajının artışı ile RBBR giderim verimi artmıştır. 60 dakikalık temas süresinde dengeye ulaşılmıştır. Başlangıç boyar madde konsantrasyonun artışı ile giderim verimi azalmıştır. Çalışmada, deneysel verilerin Langmuir ve Freundlich izoterm modellere uygunluğu da araştırılmış ve bu modellere ait parametreler hesaplanmıştır. K-nZVI ile RBBR adsorpsiyonun hem Langmuir hem de Freundlich izoterme uygun olduğu tespit edilmiştir. Maksimum adsorpsiyon kapasitesi 200 mg g-1 olarak belirlenmiştir.

Anahtar Kelimeler

• Adsorpsiyon,boyar madde giderimi,K-nZVI,izoterm,RBBR

Use of Kaolin-supported Nano-scale Zero-valent Iron for Removal of Remazol Brilliant Blue R from Aqueous Solution

Öz

In this study, kaolin supported nano-sized zero-valent iron (K-nZVI) particles were synthesized by borohydride reduction method in presence of kaolin and used for removal of Remazol Brilliant Blue R (RBBR) from aqueous solution. The effects of solution initial pH, K-nZVI dosage, contact time and initial dye concentration for removal of RBBR were evaluated. The removal efficiency was determined to be pH dependent and the maximum removal efficiency of RBBR was obtained at pH 3. RBBR removal efficiency increased with increasing K-nZVI dosage in the dosage range of 0.3 and 1.0 g L-1. The equilibrium was reached at the contact time of 60 minutes. The removal efficiency decreased with the increase of the initial dye concentration. In this study, the suitability of experimental data to Langmuir and Freundlich isotherm models was also investigated and the parameters of these models were calculated. It was found that RBBR adsorption by K-nZVI was suitable for both Langmuir and Freundlich isotherm. The maximum adsorption capacity was determined as 200 mg g-1.

Anahtar Kelimeler

• Adsorption,dye removal,K-nZVI,isotherm,RBBR

Kaynakça

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