کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
642247 1457030 2012 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparative separation of Rebaudiana A from commercialized steviol glycosides by macroporous adsorption resins mixed bed
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Preparative separation of Rebaudiana A from commercialized steviol glycosides by macroporous adsorption resins mixed bed
چکیده انگلیسی

This work focused on the separation and purification of commercialized steviol glycosides (SGs) by macroporous adsorption resins (MARs) mixed bed through the adsorption and desorption experiments. Firstly, the influence of functional groups on the separation degree of Rebaudiana A (RA) were investigated based on gel type ion exchange resins (GIRs), and the result showed the group of –N(CH3)2 was the best. Then, 21 sorts of MARs were screened one by one with adopting the separation degree of RA as the prior index, then the mixed bed of MARs that contained two, three, … till six were investigated in turn to find the most effective separation MARs mixed bed, and the results showed that MARs mixed bed LZ-1+LZ-20+LZ-30+LZ-37+LZ-36 had the higher separation efficiency than the others. Besides, the experimental data of MARs mixed bed LZ-1+LZ-20+LZ-30+LZ-37+LZ-36 well fitted the pseudo-second-order kinetics model and Brunauer’s IV adsorption isotherm model. And it was found that the intra-particle diffusion process was rate-limiting step. After that, the separation parameters of RA from commercialized SGs were optimized through adsorption and desorption experiments. And under the obtained optimum separation conditions, the separation degree increased from 0.838 to 0.9196 with a recovery yield of 91.67% through only one cycle adsorption and desorption.


► The separation effect of RA on 21 MARs was studied.
► MARs mixed bed LZ-1+LZ-20+LZ-30+LZ-37+LZ-36 offered the best separation efficiency.
► Adsorption on MARs mixed bed above accorded with the pseudo-second-order model.
► Adsorption isotherm on MARs mixed bed fitted Brunauer’s IV model.
► DAS increased from 0.838 to 0.9196 with a recovery yield of 91.67%.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Separation and Purification Technology - Volume 89, 22 March 2012, Pages 22–30
نویسندگان
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