Kinetics of diffusion-controlled adsorption of adenine and adenosine in a carboxymethyl diaminoethane PVC-mediated column system
Küçük Resim Yok
Tarih
2015
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
SCIENCE REVIEWS 2000 LTD
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
The adsorption kinetics of adenine and adenosine on a ligand-exchange matrix, carboxymethyl diaminoethane poly(vinyl chloride) in cobalt form (cobalt-CMEDA-PVC), have been studied in a fixed-bed column system. The initial ligand concentrations ranged between 1.25x10(-5) and 2.0x10(-4) mol L-1. The kinetic studies were carried out spectrophotometrically, in order to determine the rate-controlling step of the adsorption. The kinetic data of the single-component systems were acquired from the breakthrough curves of the ligands on the basis of the equivalent points method. In this study, the homogeneous diffusion model was adapted to a fixed-bed column system to describe the differentiation in the ligand concentration of the effluent, beginning from breakthrough point as a function of time. The results obtained for the adsorption kinetics indicated that the diffusion step plays a significant role in the adsorption kinetics of the ligands, due to the fact that the adsorption performance was strongly affected by the initial concentration of ligands.
Açıklama
Anahtar Kelimeler
adenine, adenosine, rate-controlling, step, breakthrough curve, ligand-exchange, equivalent points method
Kaynak
PROGRESS IN REACTION KINETICS AND MECHANISM
WoS Q Değeri
Q4
Scopus Q Değeri
Cilt
40
Sayı
1
