کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
622655 1455296 2016 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Modified Kedem-Katchalsky equations for osmosis through nano-pore
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Modified Kedem-Katchalsky equations for osmosis through nano-pore
چکیده انگلیسی
Kedem-Katchalsky (K-K) equations provide an important model in analyzing the osmosis in both biological systems and membrane technology, including reverse osmosis for desalination. However, some experiments have shown that it is not able to accurately describe the osmosis through nano-pores. The most significant problem is that the two reflection coefficients in two of the K-K equations are not equal to one another. In this work, three new parameters, osmotic pressure coefficient, primary filtration coefficient and secondary selectivity rate, were introduced to replace the reflection coefficient in the K-K equations. Using an analytical method based on molecular dynamics, the quantitative relationship between osmotic pressure coefficient and the molecule size was obtained. This quantitative relationship was verified by comparing the theoretical results with the reported experimental data of aquaporin osmosis. The theoretical predictions agreed well with experimental results, showing high accuracy of this model. This work is expected to pave the way for a better understanding of osmosis in bio-systems and to inspire new ideas in designing new membranes with better performance.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Desalination - Volume 399, 1 December 2016, Pages 47-52
نویسندگان
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