Telli Müjgan OKUR, Çağla AK, Utku TÜMTÜRK

DOĞAL VE KALSİNE YUMURTA KABUKLARININ Cr(III) GİDERİMİNDE DEĞERLENDİRİLMESİ

Bu çalışmada Cr(III)’ün tavuk yumurtası kabuklarına adsorpsiyonu araştırılmıştır. Bu amaçla kalsine edilmiş (900°C ve 3 saat) ve doğal yumurta kabukları adsorplayıcı olarak kullanılmıştır. Yumurta kabuğu miktarı (0,6-2,0 g/L), Cr(III) derişimi (50-350 mg/L) ve sıcaklığın (25-55 °C) Cr(III) adsorpsiyonuna etkisi incelenmiştir. Kalsine edilmiş ve doğal yumurta kabukları X-ışını kırınım (XRD) cihazında analiz edilmiştir. Doğal yumurta kabukları ile Cr(III) adsorpsiyonunda 25°C’de, 50-350 mg/g Cr(III) derişimi aralığında % 100-16,6 giderim ve 38,23-46,31 mg/g giderim kapasitesi elde edilmiştir. Kalsine edilmiş yumurta kabukları ile Cr(III) giderimi çöktürmeyle gerçekleştirilmiştir. Langmuir, Freundlich ve Temkin adsorpsiyon modelleri deneysel verilere uygulanmış ve her üç modelinde uygun olduğu belirlenmiştir. Cr(III) adsorpsiyon kinetiğinin Yalancı ikinci derece kinetik ile daha iyi ifade edildiği bulunmuştur. Bu çalışma atıksularda bulunan Cr(III) iyonlarının gideriminde doğal ve kalsine tavuk yumurtası kabuklarının kullanılabileceğini göstermiştir.

Anahtar Kelimeler:

Tavuk yumurtası kabuğu, Cr (III), Adsorpsiyon, Adsorpsiyon İzotermi, Adsorpsiyon Kinetiği

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