کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
639485 | 1456199 | 2006 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Simultaneous interactions between a low molecular-weight species and two high molecular-weight species studied by diafiltration
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
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چکیده انگلیسی
A mathematical model is presented that allows calculating the distribution concentration of low molecular-weight species (LMWS) interacting simultaneously with two high molecular-weight species in diafiltration experiments. This treatment may be used for the study of the interactions of LMWS with a water-soluble polymer (WSP) when surface fouling equilibrium on the diafiltration membrane is held, the simultaneous interaction with two WSP, or the coexistence of equilibria that may produce retention of the LMWS in the diafiltration cell, as molecular aggregation. For this treatment, it is assumed that the constants directing all the equilibria are kept independently of the presence of other connected equilibrium situations. Contrasting this treatment with previously described approximations, it is shown that significant differences are found in the calculation of the apparent dissociation constant between salicylic acid (SA) and branched poly(ethyleneimine) (BPEI), but not in the case of the interaction of triphenylterazolium chloride (TTC) with poly(sodium 4-styrenesulfonate) (PSS), related with the respective sieving coefficient values for SA (0.54) and for TTC (0.91).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 272, Issues 1â2, 15 March 2006, Pages 137-142
Journal: Journal of Membrane Science - Volume 272, Issues 1â2, 15 March 2006, Pages 137-142
نویسندگان
Ignacio Moreno-Villoslada, VÃctor Miranda, Marlén Jofré, Patricio ChandÃa, José Miguel Villatoro, José Luis Bulnes, Marcos Cortés, Susan Hess, Bernabé L. Rivas,