TEKSTİL ATIKSULARINDAKİ METAL KOMPLEKS BOYARMADDELERİN YUMURTA KABUKLARI İLE GİDERİMİ

Bu çalışmada AV90 (C.I.Acid Violet 90) ve AY194 (C.I.Acid Yellow 194) boyarmaddelerinin yumurta kabukları kullanılarak adsorpsiyonu araştırılmıştır. pH (2-7), adsorplayıcı miktarı (3-25 g/L), partikül boyutu (30-710 µm), sıcaklık (20-40ºC) ve başlangıç boyarmadde derişimi (50-200 mg/L) gibi parametrelerin adsorpsiyona etkileri incelenmiştir. En yüksek giderim her iki boyarmadde için pH 2 de elde edilmiştir. Deneysel denge verilerine Langmuir, Freundlich ve Temkin adsorpsiyon izoterm modelleri uygulanmıştır ve izoterm sabitleri belirlenmiştir. En yüksek boyarmadde giderimi 20oC sıcaklıkta gerçekleştirilmiş olup bu sıcaklıkta sırasıyla 9,7 mg/g ve 9,60 mg/g giderim kapasitesi ve % 82,3 ve % 91,5 giderim elde edilmiştir. Boyarmaddelerin adsorpsiyon kinetiği en iyi Pseudo ikinci derece model ile tanımlanmıştır.

REMOVAL OF METAL-COMPLEX DYE FROM TEXTILE WASTEWATERS USING EGGSHELL

In this study, adsorption of AV90 (C.I.Acid Violet 90) and AY194 (C.I.Acid Yellow 194) acid dyes using eggshell was investigated. The effects of various parameters such as pH (2-7), adsorbent dosage (3-25 g/L), particle size (30-710 µm), temperature (20-40ºC), initial dye concentration (50-200 mg/L) were examined. The highest dye removal was obtained at pH 2 for both of the dyes.The Langmuir, Freundlich and Temkin adsorption isotherm models were applied to the experimental equilibrium data and the isotherm constants were determined. The highest dye removal was observed at 20 ºC and the adsorption capacities and percentage removal of eggshell for AV90 and AY194 were obtained as 9.97mg/g, 9.60 mg/g and 82.3 % and 91.5 % at 20oC, respectively. The adsorption kinetic of dyes was acquired Pseudo second order model.

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