Bazik Boyanın Astrazon Mavisi FGRL Iki Farklı Doğal Kil Üzerine Adsorpsiyonu

Yıl 2017, Cilt: 7 Sayı: 2, 438 - 448, 01.06.2017

Erhan Gengec

Öz

Bu çalışmada Sivas İlinden temin edilen, Talc ve Chrysotile doğal killerinin bazik tekstil boyası Astrazon Mavisi giderimdeki kullanım potansiyeli araştırılmıştır. Çalışma kapsamında farklı boya başlangıç konsantrasyonları 100-400 mg/L , pH , adsorbent miktarı 1-4 g/L ve sıcaklıklarda 313-333 K çalışılmıştır. Sonuçlar; artan başlangıç konsantrasyonu, pH, adsorbent miktarı ve sıcaklığın adsorpsiyon kapasitesini artırdığını göstermiştir. İlave olarak, üç kinetik model; yalancı birinci, yalancı ikinci ve partikül içi diffüzyon modeli adsorpsiyon sabitlerinin hesaplanması için kullanılmıştır. Sonuçlar en yüksek korelasyon katsayılarının R2>0.9960 , yalancı ikinci dereceden kinetik ile elde edildiğini göstermektedir. Doğal killer kıyaslandığında Talc’ın Chrysotile’den daha yüksek giderim verimi ve adsorpsiyon kapasitesine sahip olduğu görülmüştür. pH 7’de, 300 mg/L başlangıç boya konsantrasyonunda ve 1020 dakikalık karıştırma süresinde Talc ve Chrysotile için en yüksek adsorpsiyon kapasiteleri 284 mg/g ve 169 mg/g olarak elde edilmiştir

Anahtar Kelimeler

Adsorpsiyon kinetiği, Bazik boyalar, Doğal kil, Yalancı ikinci dereceden adsorpsiyon kinetiği

The adsorption of basic dye Astrazon Blue FGRL from aqueous solutions onto two different clays: Talc and Chrysotile

Öz

In this study, Talc and Chrysotile were obtained from Sivas, Turkey and used as adsorbents for the investigation of the adsorption of the basic dye Astrazon Blue FGRL from aqueous solutions at various dye concentrations 100–400 mg/L , initial pH 3-7 , adsorbent doses 1-4 g/L , contact time 2.5-1400 min and temperatures 313–333 K . The result showed that the adsorption capacity of the dye increased with increasing initial dye concentration, pH, adsorbent dose and temperature. In addition, three kinetic models; the pseudo first order, pseudo second order and intraparticle diffusion, were used to predict the adsorption rate constants. The results showed that the highest correlation coefficients R2>0.9960 were obtained for pseudo second order kinetics. When the natural clays were compared, it was observed that, Talc showed higher removal efficiencies and adsorption capacity than Chrysotile. The highest adsorption capacity was obtained as 284 mg/g and 169 mg/g for Talc and Chrysotile at pH 7, 298 ºK, 300 mg/L of initial dye concentration and 1020 min of agitation time, respectively. The results showed that Talc and Chrysotile have important potentials for removal of basic dyes which are cheap and easy available.

Anahtar Kelimeler

Basic dyes, Natural clays, Adsorption kinetics, Pseudo second order kinetics.

Kaynakça

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