Adsorption removal of anthocyanins from red cabbage extracts by bentonite: statistical analysis of main and interaction effects
Journal Title: Хімія, фізика та технологія поверхні - Year 2017, Vol 8, Issue 4
Abstract
In recent years, anthocyanins are widely used in food industry as natural dyes and in medicine as compounds with high antioxidant activity. In connection with this, examination of adsorption removal of anthocyanins from extracts of cheap plants containing a lot of these compounds as well as of main and interaction effects which influent on adsorption of anthocyanins is important. In this paper, experiments were conducted according to full factorial experimental design to identify the main and interaction effects of factors and their influence on the removal efficiency of anthocyanins from red cabbage aqueous extracts by bentonite. The factors were investigated at two levels: contact time – 30 and 120 min, temperature – 293 and 323 K, initial anthocyanin concentration – 70 and 130 mg/L, and adsorbent mass – 10 and 25 g/L. The total number of 16 experiments was performed and each experiment was repeated thrice to evaluate an experimental error. Main and interaction effects were analysed using of variance (ANOVA), F-test and P-values to define most important process variables affecting the anthocyanin adsorption. A mathematical model that considers the significant main and interaction effects was suggested. The variance analysis and the statistic data showed that the model was adequate and had high coefficient of determination (R2 = 0.9954). The mathematical model obtained allows prediction of the removal of anthocyanins from red cabbage aqueous extracts with bentonite. We have found that the contact time and adsorbent mass have the positive effect, but the initial concentration of anthocyanins and temperature as well as two-way interaction “contact time-temperature”, three-way interactions “contact time-initial anthocyanin concentration-adsorbent mass” and “temperature-initial concentration of anthocyanins-adsorbent mass” have the negative effect on the removal of anthocyanins from red cabbage extracts by bentonite. The results indicated that higher removal efficiency of anthocynians from red cabbage aqueous extracts was 95 % at 120 min, 293 K, initial anthocyanin concentration 70 mg/L, and adsorbent mass 25 g/L.
Authors and Affiliations
L. M. Soldatkina, V. O. Novotna
Keywords
Related Articles
- EP ID EP252175
- DOI 10.15407/hftp08.04.439
- Views 110
- Downloads 0
Synthesis of nano-structured powders of yttrium aluminum garnet doped with cerium and their application to form filled polymer optical composites
A method of thermochemical synthesis of powders of yttrium-aluminum garnet doped with cerium (yellow phosphor) for polymer material filling with the purpose of optical composites creation has been developed. As initial i...
Влияние гидроксида калия на структуру и развитие поверхности бурого угля при щелочной активации
Исследованы изменения структуры и характера термолиза бурого угля, обусловленного интеркалированием KOH при соотношении щелочь/уголь RKOH≤15 ммоль/г. На зависимостях глубины изменений от RKOH идентифицированы две области...
Физико-механические свойства органо-неорганических композитов на основе полиуретана, силиката натрия и Zn-Al слоистых двойных гидроксидов
Целью данной работы было создание органо-неорганических композитов (ОНК) полиуретана, содержащих силикат натрия и Zn-Al слоистые двойные гидроксиды (СДГ). Органической матрицей был выбран макродиизоцианат (МДИ) на основе...
Разные методы для описания морфологических и текстурных характеристик различных материалов
Целью данной работы было сравнение разных методов для описания текстурных характеристик разных материалов. Несколько путей могут быть избраны для описания морфологии и текстуры различных материалов: (i) адсорбция-десорбц...
CdS films on the porous substruction of Si obtained by chemical surface deposition
The purpose of this work is to develop a technology for the production of CdS films by chemical surface deposition on porous substrates of nanocrystalline silicon. The possibility of using the heterostructure CdS/porous-...