Makale BilgisiÖz Bu çalışmada Polianilin/Aljinat (PANİ/SA) adsorbent malzemesi Asit Violet 90 (AV 90) boyar maddesinin adsorpsiyonunda kullanılmıştır. PANİ/SA'nın karakterizasyonu Fourier Dönüşüm Kızılötesi Spektroskopisi (FTIR) ile analiz edilmiştir. pH (2-6), PANİ/SA küre sayısı (10-50 adet) ve AV 90 derişiminin (25-200 mg/L) boyar madde giderimine etkisi incelenmiştir. En yüksek boyar madde giderimi pH 2'de elde edilmiştir. AV 90 adsorpsiyon izotermlerini belirlemek için Langmuir, Freundlich ve Temkin modelleri kullanılmıştır. Boyar madde derişimi 25-200 mg/L aralığında iken Langmuir modelinden elde edilen maksimum adsorpsiyon kapasitesi (qm) değeri 138,9 mg/g olarak bulunmuştur. Adsorpsiyon kinetiğinin belirlenmesi için Yalancı birinci derece ve ikinci derece kinetik modelleri kullanılmış ve Yalancı ikinci derece kinetik modelin deney verileri ile daha uyumlu olduğu görülmüştür. Deney sonuçları PANİ/SA adsorbentinin AV 90 boyar maddesinin adsorpsiyonu için oldukça iyi bir alternatif olduğunu göstermiştir.
AbstractIn this study, Polyaniline/Alginate (PANI/SA) material was used to adsorption of Acid Violet 90 (AV 90) dye. The characterization of PANI/SA was analyzed by Fourier transform infrared spectroscopy (FTIR). The effect of pH (2-6), number of PANI/SA beads (10-50 adet) and concentration of AV 90 (25-200 mg/L) on removal of dye were examined. The highest dye removal was obtained at pH 2. Langmuir, Freundlich and Temkin models were used to determine AV 90 adsorption isotherms. The maximum adsorption capacity (qm) value obtained from the Langmuir model in the range of 25-200 mg/L dye concentrations was found to be 138.9 mg / g. To determine the adsorption kinetics, Pseudo first order and second order kinetic models were used and it was found that the Pseudo second order kinetic model was more compatible with the experimental data. Experimental results have shown that PANI/SA adsorbent is a very good alternative for adsorption of AV 90 dye.
Zeolite-Poly(2-hydroxyethyl methacrylate (HEMA)-co-acrylic acid (AA)) hydrogel composite materials were synthesized by in situ free radical addition polymerization technique. The swelling values obtained highly for the hydrogel are synthesized at HEMA/AA monomer ratio value of 80/20. The hydrogel composites synthesized with zeolite having -90 µm particle size and 20 wt% amount showed the highest swelling degree. Zeolite adding to the hydrogel structure increased the swelling values of hydrogel. Synthesized samples were characterized using a Fourier transform infrared spectrometer technique.
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