The adsorptive removal of Telon Blue AGLF (TB AGLF) from aqueous solution using sunflower pulp was studied. The effects of pH, adsorbent dose, temperature, and initial dye concentration on the adsorption capacity and the removal % of TB AGLF were investigated. Experimental results showed that sunflower pulp was excellent agroindustrial adsorbent with maximum dye removal efficiency of 97.22% for a very short time (under conditions of 100 mg L−1initial dye concentration, pH = 3,T=50°C, and 1 g L−1of adsorbent dose). The binary effects of initial dye concentration and temperature on the adsorption properties of sunflower pulp were analysed by RSM and two model equations for predicting adsorption capacity and dye removal % of pulp because arbitrarily chosen initial dye concentration and temperature were developed by using response surface methodology (RSM). Experimental values of the adsorption capacity and dye removal % were in good agreement with the predicted values by the improved models. Adsorption experiments and kinetic regression results indicated that the experimental data were well defined with pseudo-second-order kinetic model.
ASİDİK BOYARMADDE İÇEREN TEKSTİL ENDÜSTRİSİ ATIKSULARINDAN ADSORPSİYON YÖNTEMİYLE RENK GİDERİLMESİ ÖZBu çalışmada, atıksulardan boyarmadde gideriminde yaygın olarak kullanılan adsorbentlere alternatif olabilecek yüksek giderim verimine sahip kitosan malzemesi kullanılmıştır. Acid Blue 29(AB 29) boyarmaddesinin kitosan üzerine adsorpsiyonunda, pH, adsorbent derişimi(X), başlangıç boyarmadde derişimi ve sıcaklık gibi ortam parametrelerinin etkisi incelenerek proses için en uygun değerler saptanmıştır. Deneysel sonuçlardan, adsorpsiyonun dengeye 15-20 dakikada ulaştığı gözlenmiştir. Bu denge sürecinde en iyi adsopsiyon verimi pH=4, X=1.0g/L ile T=35°C değerlerinde elde edilmiştir. Adsorpsiyon denge verilerinin Langmuir ve Freundlich izoterm modellerine uyumluluk durumu araştırıldığında, en iyi uyumun en yüksek regresyon katsayılarının elde edildiği Langmuir modelinde gerçekleştiği gözlenmiştir. AB 29 boyarmaddesinin kitosana adsorpsiyonunun kinetic analizi amacıyla deneysel verilere yalancı birinci ve ikinci derece kinetik model uygulanmış, tüm korelasyon katsayılarının 0.99'dan büyük olması, deneysel ve teorik değerlerin birbirine çok yakın çıkmasından dolayı adsorpsiyon kinetiğinin ikinci derece kinetik modele oldukça iyi uyum sağladığı belirlenmiştir. Sistem termodinamik açıdan analiz edildiğinde ise, adsorpsiyonda elde edilen negative ΔG o değerleri adsorpsiyonun kendiliğinden gerçekleştiğini, adsorpsiyonun gerçekleşmesi için bir enerji engelinin olmadığını göstermiştir. Yapılan çalışma sonucunda boyarmadde gideriminde kitosanın diğer adsorbentlere alternatif bir adsorbent olarak kullanılabileceği düşünülmektedir.Anahtar kelimeler:Kitosan, Adsorpsiyon, İzoterm, Kinetik, Acid Blue 29. COLOR REMOVAL BY ADSORPTION PROCESSES OF TEXTILE INDUSTRY WASTEWATER CONTAINING ACIDIC DYES ABSTRACTIn this study, chitosan material as an alternative adsorbent to the commonly used materials with high removal efficiency were used for the removal of dye from wastewater. In the adsorption of Acid Blue 29(AB 29) dye onto chitosan, the adsorption parameters such as pH, adsorbent concentration, initial dye concentration and temperature were investigated and the optimum conditions for the adsorption process were determined. From the experimental results, it was observed that adsorption reached to the equilibrium in 15-20 minutes . The highest removal yield in the equilibrium process was obtained at pH=4 , X=1.0 g/L (adsorbent concentration) values and T=35 °C .When the fitting of the adsorption data to Langmuir and Freundlich isotherm models were investigated, the best fitting was observed to Langmuir model with the highest regression coefficients.
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