Adsorptive separation of Ginsenoside from aqueous solution by polymeric resins: Equilibrium, kinetic and thermodynamic studies

Barkakati, Pranab; Begum, Ashma; Das, Makhan Lal; Rao, Paruchuri G.

doi:10.1016/j.cej.2010.04.018

Cited by 47 publications

(33 citation statements)

References 25 publications

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“…In some cases, ACs were superior to polymeric resins for phenol adsorption (Otero et al, 2005d), and similar for flavonoid adsorption (Aehle et al, 2004). Macroporous resin adsorption emerged as an efficient technique for separation, recovery and concentration of active components from vegetals, including leaves (Xu et al, 2000;Silva et al, 2007;Li and Chase, 2009), bark (Lorenz and Roennefahrt, 2004), roots and rhizomes (Fu et al, 2005;Xu et al, 2005), hawthorn (Liu et al, 2010a,b), juice (Saleh et al, 2008), fruits (Lang, 2004), and commercial extracts (Barkakati et al, 2010). Resins have been applied to the purification of products and byproducts of citrus (Doner et al, 1993), pomegranate (Seeram et al, 2005a;Seeram et al, 2005b) and cacao (Kim et al, 2004).…”

Section: Purification Of Bioactive Phenolic Compoundsmentioning

confidence: 96%

Recovery, concentration and purification of phenolic compounds by adsorption: A review

Soto

Moure

Domı́nguez

et al. 2011

Journal of Food Engineering

432

211

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Section: Purification Of Bioactive Phenolic Compoundsmentioning

confidence: 96%

Recovery, concentration and purification of phenolic compounds by adsorption: A review

Soto

Moure

Domı́nguez

et al. 2011

Journal of Food Engineering

432

211

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“…Kinetic data can further be used to check whether pore diffusion is the only rate‐controlling step or not in the adsorption system using Bangham's equation :

Log log true(C_{0} / C_{0} - q_{t} m true) = log true(k_{0} m / 2.303 V true) + α log true(normalt true)

where C 0 is the initial concentration of adsorbate in solution (mg/L), V is the volume of solution (mL), m is the weight of adsorbent per liter of solution (g/L), q t (mg/g) is the amount of adsorbate retained at time t , and a (less than 1), and k 0 are constants (Table ). The double logarithmic plot (Figures c and d) according to above equation yielded perfect linear curves for AB83 removal by carbons, showing that the diffusion of adsorbate into pores of the adsorbent is not the only rate‐controlling step .…”

Section: Resultsmentioning

confidence: 90%

“…where C 0 is the initial concentration of adsorbate in solution (mg/ L), V is the volume of solution (mL), m is the weight of adsorbent per liter of solution (g/L), q t (mg/g) is the amount of adsorbate retained at time t, and a (less than 1), and k 0 are constants ( Table 3). The double logarithmic plot (Figures 7c and 7d) according to above equation yielded perfect linear curves for AB83 removal by carbons, showing that the diffusion of adsorbate into pores of the adsorbent is not the only rate-controlling step [45].…”

Section: Bangham's Equationmentioning

confidence: 86%

Kinetics and isotherm studies on acid dye adsorption using thermal and chemical activated Jatropha husk carbons

Karthick

Namasivayam

Pragasan

2017

Env Prog and Sustain Energy

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Activated carbon was prepared from Jatropha husk, as a biodiesel byproduct waste, by physical (JHC) and chemical (ZnCl2) activation (ZAJHC), as an adsorbent for the removal of acid dye Acid blue 83 (AB83). Batch adsorption experiments were carried out to study the effects of various physicochemical parameters such as contact time, initial dye concentration, adsorbent dose, and initial solution pH. The AB83 loaded and unloaded adsorbent materials were characterized by SEM, EDX, XRD, and FTIR. Lagergren first‐order, Pseudo second‐order, Intraparticle diffusion and Bangham's models were used to evaluate the kinetics and mechanism of the adsorption. The Langmuir, Freundlich, and D–R isotherm models were tested to represent the equilibrium data and the constants of the isotherms were determined by using the experimental data. Normalized deviation (Δq) is used to quantify the correlation of experimental results with the models. The maximum adsorption capacity (Qo) obtained was 7.59 and 27.93 mg g−1 at a temperature of 35°C for JHC and ZAJHC, respectively. The favorable pH for maximum AB83 adsorption was pH 2.0 for both JHC and ZAJHC. The desorption studies discovered that the regeneration and reusability of the adsorbent can be easily achieved. © 2017 American Institute of Chemical Engineers Environ Prog, 37: 719–732, 2018

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“…The adsorption rates of Fe 3 O 4 -Si-IL and Si-IL adsorbents to remove CR from aqueous solutions were able to be estimated and analyzed using pseudo first-order and pseudo second-order models [49] and have been tabulated in Table 2. The higher correlation coefficient (R 2 ) and the agreement of the calculated q e,cal values of the fitted curves obtained by the pseudo second-order kinetic model with the experimental q e,exp values prove that the pseudo second-order model is the predominant means by which to describe the adsorption process.…”

Section: Adsorption Kineticsmentioning

confidence: 99%

Novel Magnetic Silica-Ionic Liquid Nanocomposites for Wastewater Treatment

et al. 2019

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In this work, new imidazolium silica-ionic liquids doped with magnetite nanocomposites are prepared for use in the field of water purification owing to their unique properties, which can be manipulated by an external magnetic field. A silane precursor based on aminopropyltriethoxysilane (APTS) condensed with p-hydroxybenzaldehyde and glyoxal in an acetic acid solution is used to prepare disiloxyimidazolium ionic liquid (SIMIL). The silica composite (Si-IL) and silica-coated magnetite (Fe 3 O 4 -Si-IL) composites are prepared using the sol-gel technique. The chemical structures, morphologies, crystalline lattice structures, thermal stabilities, surface charges, surface areas, particle sizes, and magnetic characteristics of Fe 3 O 4 -Si-IL and Si-IL are investigated. The Fe 3 O 4 -Si-IL and Si-IL nanocomposites show excellent chemical adsorption capacities as 653 and 472 mg g −1 , respectively, during times ranging 90 to 110 min when they are used as adsorbents to remove Congo red (CR) dye as a water pollutant.Nanomaterials 2020, 10, 71 2 of 19 and integrate the merits of functional nanoparticles and vary the solid hosts of the large sizes of materials [8][9][10]. Although magnetic nanocomposites have achieved excellent results with adsorption and reuse for different cycles in the field of water treatment, some research challenges exist for their application to remove some pollutants such as toxic radioactive metals and organic and agricultural pollutants [9].The concept of a synergistic combination of two nanoparticles into a larger one has become one of the proposed synthetic techniques used to design advanced nano-adsorbents for water treatments [11][12][13][14]. Most of these materials are based on mesoporous silica-based adsorbents [15][16][17]. The large pore sizes, high specific area, good thermal and chemical stability, low manufacture cost, and excellent selectivity towards specific pollutants elect the ordered mesoporous silica composites as excellent adsorbents for water purification and treatment [17][18][19]. Highly dispersed and magnetic silica nanoparticles with large-scale chemical or sonochemical synthesis methods have been reported [20][21][22][23][24][25].With the large amount of literature available for the production of magnetic silica nanoparticles and with research still being published, perhaps some of the biggest challenges to overcome regard the production of greener selective magnetic silica nano-adsorbents for removal of organic pollutants; these are still a problem facing researchers. Organic cationic and anionic salts based on imidazolium, pyridinium, and quaternary ammonium cations which have been designated as ionic liquids (ILs) are widely used as greener extraction solvents for seawater desalination and industrial water and activated sludge treatments [26][27][28][29]. Poly (ionic liquid) (PIL) nanoparticles are used as flocculants for water purification [28], and hydrophobic PILs have been used for the selective separation of methylene blue (MB) dye and chromium ions from water [3...

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Adsorptive separation of Ginsenoside from aqueous solution by polymeric resins: Equilibrium, kinetic and thermodynamic studies

Cited by 47 publications

References 25 publications

Recovery, concentration and purification of phenolic compounds by adsorption: A review

Recovery, concentration and purification of phenolic compounds by adsorption: A review

Kinetics and isotherm studies on acid dye adsorption using thermal and chemical activated Jatropha husk carbons

Novel Magnetic Silica-Ionic Liquid Nanocomposites for Wastewater Treatment

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