Application of factorial experimental design to the study of the suspension polymerization of β‐cyclodextrin and epichlorohydrin

Romo, Ana; Peñas, Francisco Javier; Sevillano, Xabier; Isasi, José Ramón

doi:10.1002/app.23778

Cited by 42 publications

(23 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The main polymerization conditions were a CD:EP mole ratio of 1:16 and a reaction temperature of 50°C. A detailed description can be found in Romo et al (2006). The swollen polymer particles thus obtained were wet sieved and the fraction between 1.25 and 1.60 mm was chosen for this study.…”

Section: Biomass Supportmentioning

confidence: 99%

Feasibility study of degradation of phenol in a fluidized bed bioreactor with a cyclodextrin polymer as biofilm carrier

2007

Self Cite

View full text Add to dashboard Cite

This work is focused on the evaluation of a beta-cyclodextrin polymer as a carrier medium in a fluidized bed bioreactor treating aqueous phenol as a model pollutant. The insoluble polymer support was obtained in the shape of spherical beads by crosslinking beta-cyclodextrin with epichlorohydrin. A batch of swollen polymer particles was loaded into the reactor and inoculated with a mixed bacterial culture. Bacterial growth on the polymer beads was initially stimulated by glucose addition to the medium, and then gradually replaced with phenol. The operational variables studied after the acclimation period included phenol load, hydraulic residence time and recirculation flow rate. Low hydraulic residence times and moderate phenol loads were applied. The elimination capacity was usually about 1.0 kg-phenol/m(3)d, although a maximum of 2.8 kg-phenol/m(3)d was achieved with a retention time of only 0.55 h. The depuration efficiency was not affected by the recirculation flow rate in the range studied. Neither operational nor support stability problems were detected during the operation. A high degree of expansion was achieved in the bioreactor due to the hydrogel nature of the cyclodextrin polymer and, consequently, a low energy requirement was necessary to fluidize the bed.

show abstract

Section: Biomass Supportmentioning

confidence: 99%

Feasibility study of degradation of phenol in a fluidized bed bioreactor with a cyclodextrin polymer as biofilm carrier

2007

Self Cite

View full text Add to dashboard Cite

show abstract

“…Scheme ) are of great interest in sorption‐based applications 10, 11. The sorption of adsorbates in β‐CD copolymer materials may occur at various sorption sites (e.g., intracavity vs. extracavity sites), such as the β‐CD cavity or interstitial domains of the polymer framework 12–21…”

Section: Introductionmentioning

confidence: 99%

Preparation and sorption studies of β‐cyclodextrin/epichlorohydrin copolymers

Pratt

Wilson

Koziński

et al. 2010

J of Applied Polymer Sci

View full text Add to dashboard Cite

b-Cyclodextrin (b-CD) copolymer materials were synthesized by reacting different mole ratios (1 : 15, 1 : 25 and 1 : 35) of b-CD with epichlorohydrin (EP). The products were characterized using N 2 porosimetry, Fourier Transform Infrared spectroscopy, 13 C CP-MAS NMR spectroscopy, thermogravimetry analysis, elemental (C and H) analysis, and scanning electron microscopy. The sorption properties in aqueous solution were studied using p-nitrophenol (PNP) with UV-Vis spectrophotometry. Sorption isotherms were obtained at pH 4.6 and three temperatures (22, 35, and 45 C) and at pH 10.3 at 22 C. The isotherms were analyzed using the BET isotherm model and the sorption parameters provided estimates of the surface area, sorption capacity, and isosteric heats of sorption for each polymeric material. The estimated surface areas are as follows: 58.2, 52.1, and 90.1 m 2 /g at pH 4.6. At pH 10.3, the estimated surface areas are 44.2, 40.5, and 58.5 m 2 /g, respectively. The removal efficiency of PNP by the polymeric materials ranged between 4.5 and 58% for the conditions investigated whereas the isosteric heats ranged between À24.5 and À13.6 kJ/mol. Removal efficiencies were concluded to strongly depend on the sorption conditions such as pH, temperature, and the relative amounts of sorbent and dye in aqueous solution.

show abstract

“…17,29,30 In all cases, the silica hybrid materials and the CD cross-linked copolymers are white in appearance and water insoluble, whereas the GAC and modified GAC compounds are black, water-insoluble materials. The 13 C NMR and IR results are consistent with the spectral signatures of the anticipated products.…”

Section: Resultsmentioning

confidence: 97%

“…[7][8][9][10][11][12][13][14][15][16] Advances in polymer chemistry has afforded the development of novel synthetic engineered sorbent materials that incorporate carbohydrate molecules such as cyclodextrins (CDs) within a polymeric framework. [17][18][19][20][21][22][23][24][25] b-CD-based polymeric materials represent a versatile class of host molecules capable of encapsulating inorganic and organic guest molecules in aqueous solution, gas phase, and in the solid state. 21 Sorbent materials that incorporate CD compounds are of great interest because of their interesting physicochemical properties and potential utility as sorbents for the sequestration of trace organic contaminants in aquatic and soil media to safe concentration levels.…”

Section: Introductionmentioning

confidence: 99%

Sorption of Agrochemical Model Compounds by Sorbent Materials Containing β-cyclodextrin

Wilson

Mohamed

Guo

et al. 2010

Journal of Agromedicine

View full text Add to dashboard Cite

Polymeric sorbent materials that incorporate beta-cyclodextrin (CD) have been prepared and their sorption behavior toward two model agrochemical contaminant compounds, p-nitrophenol (PNP) and methyl chloride examined. The sorption of PNP was studied in aqueous solution using ultraviolet-visible (UV-Vis) spectroscopy, whereas the sorption of methyl chloride from the gas phase was studied using a Langmuir adsorption method. The sorption results for PNP in solution were compared between granular activated carbon (GAC), modified GAC, CD copolymers, and CD-based mesoporous silica hybrid materials. Nitrogen porosimetry at 77 K was used to estimate the surface area and pore structure properties of the sorbent materials. The sorbents displayed variable surface areas as follows: copolymers (36.2-157 m(2)/g), CD-silica materials (307-906 m(2)/g), surface modified GAC (657 m(2)/g), and granular activated carbon (approximately 10(3) m(2)/g). The sorption capacities for PNP and methyl chloride with the different sorbents are listed in descending order as follows: GAC > copolymers > surface modified GAC > CD-silica hybrid materials. In general, the differences in the sorption properties of the sorbents were related to the following: (i) surface area of the sorbent, (ii) CD content and accessibility, (iii) and the chemical nature of the sorbent material.

show abstract

Application of factorial experimental design to the study of the suspension polymerization of β‐cyclodextrin and epichlorohydrin

Cited by 42 publications

References 23 publications

Feasibility study of degradation of phenol in a fluidized bed bioreactor with a cyclodextrin polymer as biofilm carrier

Feasibility study of degradation of phenol in a fluidized bed bioreactor with a cyclodextrin polymer as biofilm carrier

Preparation and sorption studies of β‐cyclodextrin/epichlorohydrin copolymers

Sorption of Agrochemical Model Compounds by Sorbent Materials Containing β-cyclodextrin

Contact Info

Product

Resources

About