Muhammet Şaban TANYILDIZI, Serhat ELÇİÇEK, Yavuz DEMİRCİ

Buğday Kepeğiyle Asidik Boya Gideriminin Cevap Yüzey Yöntemiyle Modellenmesi

Reaktif Sarı 145 boyar maddesinin buğday kepeğiyle giderimi iki aşamalı deneysel tasarım yöntemi kullanılarak incelenmiştir. Placket-Burman tarama deneylerinin istatiksel analizi sonucunda adsorbent dozu, başlangıç pH’sı, boyar madde konsantrasyonu ve temas süresinin boyar madde gideriminde etkin olduğu belirlenmiştir. Bu parametrelerin etkileşimi ve optimum değerleri 1.25 g/lt adsorbent dozu, 0.5 başlangıç pH’sı, 100 mg/lt boyar madde konsantrasyonu ve temas süresi 256 dak. olarak Merkez Kompozit Dizayn deneyleri yardımıyla belirlenmiştir. Adsorbent dozu ile başlangıç pH’sı ve boyar madde konsantrasyonu arasındaki etkileşimin istatiksel olarak önemli olduğu ANOVA sonuçlarına göre görülmüştür. Adsorpsiyon denge verileri Langmuir ve Freundlich izotermleriyle incelenmiş ve Langmuir izoterm modelinin adsorpsiyon mekanizmasını daha iyi açıkladığı görülmüştür. Ayrıca adsorpsiyon kinetiğinin yalancı ikinci derece kinetik modele uygun olduğu görülmüştür.

Anahtar Kelimeler:

Deneysel tasarım, Reaktif Sarı 145, Buğday kepeği, Adsorpsiyon

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Removal of reactive yellow 145 with wheat bran (WB) has been investigated by using a two-stage experimental design. It was determined that adsorbent dosage, initial pH value, initial dye concentration and contact time are effective parameters on dye removal. Using a central composite design, it was also found that optimum values of these parameters are 1.25 g/lt adsorbent dosage, 0.5 initial pH, 100 mg/lt initial dye concentration and 256 min contact time. The interaction among adsorbent dosage, initial pH and initial dye concentration has been seen to be crucial statistically based on ANOVA. Adsorption equilibrium data were analyzed and it was determined that Langmuir isotherm model explained the adsorption mechanism in a better way. Meanwhile, it was also determined that adsorption kinetics is more suitable for pseudo second order kinetics model

Keywords:

Experimental Design, Reactive Yellow 145; Wheat Bran; Dye Removal; Adsorption,

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