کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1208925 | 965323 | 2006 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Experimental and theoretical studies of sorption kinetics of the anthracycline antitumor antibiotic rubomycin on a carboxylic heterogeneous sorbent
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
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چکیده انگلیسی
The present work is devoted to experimental and theoretical studies of the sorption kinetics of the anthracycline antitumor antibiotic rubomycin on a carboxylic heteroreticular sorbent, BDM-12. The dependence of sorption kinetic parameters on the radius of sorbent grains has been experimentally obtained. The comparison of experimental data with the predictions of both homogeneous and “shell-and-core” models demonstrates the impossibility of using these models for adequate description of the rubomycin sorption kinetics on the sorbent, BDM-12. We have proposed a theory using the bidisperse model of heterogeneous sorbent grain and “linear driving force” approximation. This approximation can be applied at 10â3 < α = ÏI/ÏA < 1, x < 1 and gives the values of the degree of process completion with relative errors â¼(αx)2. Here ÏI and ÏA are the characteristic times required for diffusion penetration into the macro- and microspheres, respectively, x is the ratio of the microsphere and macrosphere uptakes at equilibrium. The dependences of two characteristic times of the sorption process (for short- and long-time regions) on the radius of a sorbent grain have been derived. The predictions of the theory developed here are in good agreement with our experimental data and make it possible to calculate the kinetic parameters ÏI, ÏA and x.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Chromatography A - Volume 1123, Issue 1, 4 August 2006, Pages 121-129
Journal: Journal of Chromatography A - Volume 1123, Issue 1, 4 August 2006, Pages 121-129
نویسندگان
V.P. Toshchevikov, A.Y. Toshchevikova, O.A. Pisarev,