Isothermic and Thermodynamic Approaches in Cadmium (II) Adsorption with Sivas Province Nanoclay

Nilgün Onursal

Makale detayları

Isothermic and Thermodynamic Approaches in Cadmium (II) Adsorption with Sivas Province Nanoclay

Yazarlar:

Nilgün Onursal

Yayıncı:

Bingol University

Ana Başlıklar:

Kataliz ve Reaksiyon Mekanizmaları

Dergi:

Türk Doğa ve Fen Dergisi Vol.12 Issue 4, pp.43-53

Belge Tipi:

Makale

Yayın Tarihi:

12/2023

Belge Dili:

Türkçe

Document ID (Org No.):

2001307725

pISSN:

2149-6366

Anahtar kelimeler:

Özet:

 In this study, the nano clay obtained by grinding clay from Sivas Yıldızeli region, Sivas Nano Clay SNC, was used as adsorbent for the removal of cadmium from the solution. For the characterization of nano clay; XRD, SEM-EDX, BET and TGA analyses were performed. The surface area of the adsorbent was measured as 153.364 m2g and the pore size as 3.835 nm. Parameters affecting adsorption such as temperature, adsorbent amount and speed were investigated. The contact time was determined as 180 min. The studies on adsorption equilibrium were applied to Langmuir, Freundlich, Temkin and Dubinin-Radushkevich isotherm models. As a result of the regression on the isotherm models, it was found that the adsorption fit the Temkin model. The adsorption capacity of nano clay was determined as 53.48, 49.50 and 48.54 gmg-1 for 298, 308 and 318 K temperatures. Adsorption thermodynamic study, ΔG values were found to be -26.553, -27.673, -28.796 kJmol-1 ΔH value 6,823 kJmol-1 and ΔS value 0.112 kJmol-1K-1 for 298, 308, 318 K, respectively. The positive value of ΔH indicates that the event is endothermic. The positive value also indicates that the event is chemical. The negative sign of ΔG indicates that the event is spontaneous.

 In this study, the nano clay obtained by grinding clay from Sivas Yıldızeli region, Sivas Nano Clay SNC, was used as adsorbent for the removal of cadmium from the solution. For the characterization of nano clay; XRD, SEM-EDX, BET and TGA analyses were performed. The surface area of the adsorbent was measured as 153.364 m2g and the pore size as 3.835 nm. Parameters affecting adsorption such as temperature, adsorbent amount and speed were investigated. The contact time was determined as 180 min. The studies on adsorption equilibrium were applied to Langmuir, Freundlich, Temkin and Dubinin-Radushkevich isotherm models. As a result of the regression on the isotherm models, it was found that the adsorption fit the Temkin model. The adsorption capacity of nano clay was determined as 53.48, 49.50 and 48.54 gmg-1 for 298, 308 and 318 K temperatures. Adsorption thermodynamic study, ΔG values were found to be -26.553, -27.673, -28.796 kJmol-1 ΔH value 6,823 kJmol-1 and ΔS value 0.112 kJmol-1K-1 for 298, 308, 318 K, respectively. The positive value of ΔH indicates that the event is endothermic. The positive value also indicates that the event is chemical. The negative sign of ΔG indicates that the event is spontaneous.

 In this study, the nano clay obtained by grinding clay from Sivas Yıldızeli region, Sivas Nano Clay SNC, was used as adsorbent for the removal of cadmium from the solution. For the characterization of nano clay; XRD, SEM-EDX, BET and TGA analyses were performed. The surface area of the adsorbent was measured as 153.364 m2g and the pore size as 3.835 nm. Parameters affecting adsorption such as temperature, adsorbent amount and speed were investigated. The contact time was determined as 180 min. The studies on adsorption equilibrium were applied to Langmuir, Freundlich, Temkin and Dubinin-Radushkevich isotherm models. As a result of the regression on the isotherm models, it was found that the adsorption fit the Temkin model. The adsorption capacity of nano clay was determined as 53.48, 49.50 and 48.54 gmg-1 for 298, 308 and 318 K temperatures. Adsorption thermodynamic study, ΔG values were found to be -26.553, -27.673, -28.796 kJmol-1 ΔH value 6,823 kJmol-1 and ΔS value 0.112 kJmol-1K-1 for 298, 308, 318 K, respectively. The positive value of ΔH indicates that the event is endothermic. The positive value also indicates that the event is chemical. The negative sign of ΔG indicates that the event is spontaneous.

 Bu çalışmada atık sulardaki ağır metallerin uzaklaştırılması için en uygun yöntemlerden biri olan adsorpsiyon yöntemi tercih edilmiş ve kadmiyumun çözeltiden giderimi için adsorban olarak Sivas Yıldızeli bölgesinden alınan kilin öğütülmesi ile elde edilen nanokil Sivas Nano Clay SNC kullanılmıştır. Nanokilin karakterizasyonu için; XRD, SEM-EDX, BET ve TGA analizleri yapılmıştır. Adsorplayıcının yüzey alanı 153.364 m2g-1 olarak,gözenek boyutu 3.835 nm olarak ölçülmüştür. Adsorpsiyonu etkileyen parametrelerden sıcaklık, adsorban miktarı ve hız gibi parametreler incelenmiştir. Temas süresi 180 dk olarak belirlenmiştir. Adsorpsiyon dengesi üzerine yapılan çalışmalar ise, Langmuir, Freundlich, Temkin ve Dubinin-Radushkevich izoterm modellerine uygulanmıştır. İzoterm modelleri ile ilgili yapılan regresyon sonucunda adsorpsiyonun Temkin modeline uyduğu tespit edilmiştir. Nanokilin adsorplama kapasitesi 298, 308 ve 318 K sıcaklıkları için 53.48, 49.50 ve 48.54 gmg-1 olarak belirlenmiştir. Adsorpsiyon termodinamiği çalışması ΔG değerleri 298, 308, 318 K için sırasıyla -26.553, -27.673, -28.796 kJmol-1 ΔH değeri 6,823 kJmol-1 ve ΔS değeri 0.112 kJmol-1K-1 olarak bulunmuştur. ΔHın pozitif değerli oluşu olayın endotermik olduğunu göstermektedir. Pozitif değer ayrıca olayın kimyasal olduğunu göstermektedir. ve ΔGın negatif işarete sahip olması olayın kendiliğinden yürüdüğünü göstermektedir.

Makale detayları

Isothermic and Thermodynamic Approaches in Cadmium (II) Adsorption with Sivas Province Nanoclay

Yazarlar:

Nilgün Onursal

Yayıncı:

Bingol University

Ana Başlıklar:

Kataliz ve Reaksiyon Mekanizmaları

Dergi:

Türk Doğa ve Fen Dergisi Vol.12 Issue 4, pp.43-53

Belge Tipi:

Makale

Yayın Tarihi:

12/2023

Belge Dili:

Türkçe

Document ID (Org No.):

2001307725

pISSN:

2149-6366

Nanoclay

Adsorption

Cadmium

Temkin

Adsorption ThermodynamicsNanokil

Adsorpsiyon

Kadmiyum

Temkin

Adsorpsiyon Termodinamiği

Sayı

Makale detayları

Yazarlar: Nilgün Onursal

Yayıncı: Bingol University

Ana Başlıklar: Kataliz ve Reaksiyon Mekanizmaları

Dergi: Türk Doğa ve Fen Dergisi Vol.12 Issue 4, pp.43-53

Belge Tipi: Makale

Yayın Tarihi: 12/2023

Belge Dili: Türkçe

Document ID (Org No.): 2001307725

pISSN: 2149-6366

Sayı

Yazarlar:

Nilgün Onursal

Yayıncı:

Bingol University

Ana Başlıklar:

Kataliz ve Reaksiyon Mekanizmaları

Dergi:

Türk Doğa ve Fen Dergisi Vol.12 Issue 4, pp.43-53

Belge Tipi:

Makale

Yayın Tarihi:

12/2023

Belge Dili:

Türkçe

Document ID (Org No.):

2001307725

pISSN:

2149-6366