Isothermic and Thermodynamic Approaches in Cadmium (II) Adsorption with Sivas Province Nanoclay
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Tarih
2023
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Erişim Hakkı
info:eu-repo/semantics/openAccess
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 m2/g 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, ?G° values were found to be -26.553, -27.673, -28.796 kJmol-1 ?H° value 6,823 kJmol-1 and ?S° value 0.112 kJmol-1K-1 for 298, 308, 318 K, respectively. The positive value of ?H° indicates that the event is endothermic. The positive value also indicates that the event is chemical. The negative sign of ?G° indicates that the event is spontaneous.
Açıklama
Anahtar Kelimeler
Adsorption, Temkin, Cadmium, Nanoclay, Adsorption Thermodynamics
Kaynak
Türk Doğa ve Fen Dergisi
WoS Q Değeri
Scopus Q Değeri
Cilt
12
Sayı
4
