Bazik Boyanın (Astrazon Mavisi FGRL) Iki Farklı Doğal Kil Üzerine Adsorpsiyonu: Talc ve Chrystoline
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 (3-7), 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.
The Adsorption of Basic Dye (Astrazon Blue FGRL) from Aqueous Solutions Onto Two Different Clays: Talc and Chrysotile
In this study, Talc and Chrysotile were obtained from Sivas, Turkey and used as adsorbents for the investigation of the adsorptionof 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 capacityof 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 resultsshowed that the highest correlation coefficients (R2>0.9960) were obtained for pseudo second order kinetics. When the natural clayswere compared, it was observed that, Talc showed higher removal efficiencies and adsorption capacity than Chrysotile. The highestadsorption 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 dyeconcentration and 1020 min of agitation time, respectively. The results showed that Talc and Chrysotile have important potentials forremoval of basic dyes which are cheap and easy available.
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