Preparation and Adsorption Research of the Modification Macroporous Adsorption Resin (LX1180)

Long, Jiapeng; Chen, Zhenbin; Liu, Xiaojiao; Kang, Lei; Du, Xueyan; Di, Duolong

doi:10.1080/03602559.2014.886044

Cited by 6 publications

(6 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Based on our previous research (Liu et al , 2011; Chen et al , 2011; Long et al , 2014), this work focused on the separation and purification of flavonoids from Sophora japonica by MAR mixed-bed technology. First, the MAR mixed bed was screened based on the single, two, three and four MAR mixed-bed adsorption experiment, and the optimal combination of the MAR mixed bed was obtained.…”

Section: Introductionmentioning

confidence: 99%

Separation of flavonoids in the leaves of Sophora japonica by macroporous adsorption resin mixed-bed technology

Zhao

Chen

Long

et al. 2017

PRT

View full text Add to dashboard Cite

Purpose The purpose of this paper is to separate and purify flavonoids existing in the leaves of Sophora japonica by a novel method, macroporous adsorption resin (MAR) mixed-bed technology, and the optimal MAR mixed bed was screened based on the adsorption experimental result with the order of single, two, three and four MAR mixed bed separately. Design/methodology/approach The adsorption performance of MAR and MAR mixed bed for flavonoids was studied using ultraviolet – visible (UV-VIS) spectrophotometry. Findings This research showed that the MAR mixed bed of LZ-54 + LZ-67 with a mass ratio of mLZ-54:mLZ-67 = 1:1 was the optimized combination with the optimal conditions of adsorption (volume V = 140 mL, pH = 5, T = 35°C) and desorption (liquid ratio R = 50 per cent, T = 30°C, pH = 6) obtained, relatively. Practical implications This study aims to find an efficient way of separating flavonoids and other components that are useful for human health from Sophora japonica, which is complying with the policy of sustainable development. Originality/value This contribution provided a novel way to separate flavonoids from Sophora japonica. Under the optimal conditions, the adsorption rate (F) of MAR mixed bed LZ-54 + LZ-67 to the flavonoids was 63.65 per cent, the desorption rate (D) was 87.31 per cent and the purity was dramatically achieved at 58.17 per cent from 17.67 per cent after a round of adsorption/desorption operation.

show abstract

Section: Introductionmentioning

confidence: 99%

Separation of flavonoids in the leaves of Sophora japonica by macroporous adsorption resin mixed-bed technology

Zhao

Chen

Long

et al. 2017

PRT

View full text Add to dashboard Cite

show abstract

“…Our labs have focused on improving the adsorption performance of MAR for 10 years, and a novel method of the MAR mixed-bed technology had been exploited. Based on previous results (Chen et al , 2011; Long et al , 2014), first, a MAR mixed bed for flavonoids from Lamiophlomis rotata (Benth.) Kudo.…”

Section: Introductionmentioning

confidence: 99%

Preparative separation and purification of flavonoids from Lamiophlomis rotata (Benth.) Kudo.

Zhao

Chen

et al. 2017

PRT

View full text Add to dashboard Cite

Purpose The purpose of the paper is to separate and purify flavonoids existed in Lamiophlomis rotata (Benth.) Kudo. by macroporous adsorption resin (MAR) mixed-bed technology. Design/methodology/approach The adsorption and desorption parameters were characterized by UV-VIS spectrophotometry. The optimal MAR mixed bed was screened based on the adsorption experiments; the experiment process was investigated by the order of single, two and three MAR mixed bed separately; and the adsorption performance, which was composed by the authority of 80 per cent adsorption ratios and 20 per cent desorption ratios, was adopted to screen MAR mixed bed for flavonoids. The adsorption dynamic investigated the order of reaction first, and then the adsorption mechanism was researched further. The adsorption thermodynamic investigated the adsorption isotherm first, and then the adsorption feature was analyzed. Findings This research found that MAR mixed bed of LS-840 + LSD301 with mass ratio of mLS840:mLSD301 = 3:2 was the optimized combination, and the optimal conditions of the adsorption were volume V = 50 mL, time t = 6.5 h, T = 40°C. The desorption conditions were ethanol content = 70 per cent, desorption time t = 3.0 h, T = 40°C. The adsorption dynamic experimental data fitted better to the pseudo-second-order, and the intra-particle-diffusion model was more suitable for expression of the adsorption mechanism in mesopores process, whereas the homogeneous particle-diffusion model was more suitable in microspores. The adsorption was a physical and multilayer adsorption, and the adsorption driving force was disappeared as it transferred to the fourth layer. Practical implications Find an efficient way to separate flavonoids that useful for human’s health, which can not only utilize of plant resources effectively, but also make outstanding contributions to medical industry. It has very high economic and social value. Originality/value This contribution provided a new way to separate flavonoids from Lamiophlomis rotata (Benth.) Kudo. Under the optimal conditions, the adsorption rate (F) of MAR mixed bed LS-840 + LSD301 to the flavonoids was 97.81 per cent, the desorption rate (D) was 90.02 per cent and the purity of flavonoids was dramatically increased about 2.08 fold of the crude extract from 28 to 58.4 per cent, and the recovery yield of flavonoids arrived at 91.6 per cent after a circle of adsorption/desorption operation.

show abstract

“…A showed the equilibrium adsorption capacity ( Q e ) increased with the initial concentration ( C 0 ) till it approached a maximum at C 0 = 3.5 g/L, which indicated MIP had a very high affinity to GA, and meant selectivity of the MIP toward GA was high, which could be attributed to the high porosity, plenty of cavities and especially large amount of free efficient sites, because the adsorption of free efficient sites was intermolecular forces, and the form of hydrogen bond can remarkably enhanced Q e . After fitting the adsorption isotherm results with Langmuir (6b), Freundlich (6c) and Scatchard (6d) models . respectively, we could found the Freundlich model was more suitable to express the adsorption behavior of GA‐MIP, which meant the adsorption of MIP to GA was a physically multi‐layer adsorption and could be understand easily, because the original self‐assembly driving force between GA and functional monomers in the process was a physical interaction.…”

Section: Resultsmentioning

confidence: 99%

“…Due to the interaction difference of CIC, DIC and IAC to model molecules, the selectivity or affinity would show a difference correspondingly. Figure 7A showed the influence of n GA /n NMBA on Q GA , Q GL and D. It could be concluded that with the decrease of n GA /n NMBA, Q GA , Q GL and D increased firstly, then tends to decrease gradually, which reached a maximum at the ratio of n GA /n NMBA = 1:38, the variation of porosity in polymer network was the main reason [19,20]. Because NMBA was the crosslinker and the quantities which influenced the solubility and rigidity of MIP, the porosity of MIP varied with n GA /n NMBA correspondingly.…”

Section: The Adsorption Isothermmentioning

confidence: 94%

Preparation and characterization of a novel molecularly imprinted polymer for the separation of glycyrrhizic acid

Long

Liang

et al. 2017

J of Separation Science

View full text Add to dashboard Cite

Molecularly imprinted polymers of glycyrrhizic acid were prepared by solution polymerization using glycyrrhizic acid as the template molecule, N-vinypyrrolidone as functional monomer, N,N-methylene bisacrylamide as cross-linker and ascorbic acid and hydrogen peroxide as initiators. Focused on the adsorption capacity and separation degree of the polymer to glycyrrhizic acid, the effects of the monomers, crosslinker and initiators were investigated and optimized. Finally, the structure of the polymer was characterized by using Fourier transform infrared spectroscopy and scanning electron microscopy. To obtain objective results, non-imprinted molecular polymers prepared under the same conditions were also characterized. The adsorption quantity of the polymer was measured by high-performance liquid chromatography. Under the optimum conditions, the maximum adsorption capacity of glycyrrhizic acid approached 15 mg/g, and the separation degree was as high as 2.5. The adsorption kinetics could be well described by a pseudo-first-order model, while the thermodynamics of the adsorption process could be described by the Langmuir model.

show abstract

Preparation and Adsorption Research of the Modification Macroporous Adsorption Resin (LX1180)

Cited by 6 publications

References 18 publications

Separation of flavonoids in the leaves of Sophora japonica by macroporous adsorption resin mixed-bed technology

Separation of flavonoids in the leaves of Sophora japonica by macroporous adsorption resin mixed-bed technology

Preparative separation and purification of flavonoids from Lamiophlomis rotata (Benth.) Kudo.

Preparation and characterization of a novel molecularly imprinted polymer for the separation of glycyrrhizic acid

Contact Info

Product

Resources

About