DOĞAL VE KALSİNE YUMURTA KABUKLARININ Cr(III) GİDERİMİNDE DEĞERLENDİRİLMESİ

Yıl 2019, , 405 - 418, 30.08.2019

Müjgan Okur , Çağla Ak Utku Tümtürk

https://doi.org/10.17482/uumfd.383572

Öz

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

Kaynakça

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