Removal of 2,4-dichlorophenol using cyclodextrin-ionic liquid polymer as a macroporous material: Characterization, adsorption isotherm, kinetic study, thermodynamics

Raoov, Muggundha; Mohamad, Sharifah; Abas, Mhd Radzi Bin

doi:10.1016/j.jhazmat.2013.10.003

Cited by 85 publications

(45 citation statements)

References 56 publications

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“…The results indicated that low temperature conditions benefit the adsorption and increase the adsorption capacity of the adsorbent, which may be attributed to the decrease in the available sites for the obtained adsorbents. This result was consistent with Raoov's research, further indicating that the adsorption process is exothermic [50]. In this study, the values of 1/n for MIPs and MNIPs were 0.6024 and 0.4888 at 15 °C, 0.5325 and 0.4196 at 25 °C, and 0.5979 and 0.5751 at 35 °C, respectively, which suggested that the removal condition of MIPs was more favorable than that of MNIPs at low temperature.…”

Section: Adsorption Isothermsupporting

confidence: 92%

Selective removal of erythromycin by magnetic imprinted polymers synthesized from chitosan-stabilized Pickering emulsion

Chen

Pan

et al. 2015

Journal of Hazardous Materials

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Section: Adsorption Isothermsupporting

confidence: 92%

Selective removal of erythromycin by magnetic imprinted polymers synthesized from chitosan-stabilized Pickering emulsion

Chen

Pan

et al. 2015

Journal of Hazardous Materials

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“…The lack of crystalline structure in CDPU may be attributed to the loss of regularity throughout the polymeric chains due to the introduction of bulky TDI molecules. 32 The porosity of CDPU was conrmed by reversible gas sorption experiments. A nitrogen adsorptiondesorption isotherm at À196 C (Fig.…”

Section: Characterization Of Pristine Cdpumentioning

confidence: 99%

Theoretical and experimental studies on the separation of cinnamyl acetate and cinnamaldehyde by adsorption onto a β-cyclodextrin polyurethane polymer

Liang

Chai

et al. 2017

RSC Adv.

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In order to isolate cinnamyl acetate (CAc) and cinnamaldehyde (CA), which coexist in cinnamon oil, a crosslinked polymer of b-cyclodextrin polyurethane (CDPU) was synthesized via a facile route and investigated as a selective adsorbent. The successful crosslinking was confirmed by FTIR, TG-DSC, XRD, SEM and N 2 adsorption-desorption analysis. The adsorption mechanism was investigated through a series of instrumental analyses and theoretical calculations, indicating that the combination of noncovalent interactions (e.g., hydrogen bonding, hydrophobic interactions) accounts for the superior affinity of CAc to CDPU, compared with CA. The adsorption behaviors of CAc and CA on CDPU were performed in the static adsorption mode, in which CDPU exhibited a selective adsorption property to CAc. The adsorption kinetics and isotherms in a single component system agreed well with the pseudosecond-order kinetic model and Freundlich isotherm model, respectively. It is noteworthy that the equilibrium adsorption amount was enhanced in the presence of the co-solute, presumably resulting from the cooperative effect arising from Lewis acid-base and p-p stacking interactions between the adsorbed CAc and CA molecules. Due to the stronger adsorption affinity of CAc to CDPU, adsorption enhancement of CAc in the presence of CA is greater than that of CA in the presence of CAc, resulting in higher CAc/CA selectivity with increasing concentrations of the equimolar mixture of CAc and CA.Additionally, CDPU could be easily regenerated and maintained high adsorption capacities and separation efficiency even after six adsorption/desorption cycles.

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“…The lower values of Dq t and relative errors (%) of the pseudo-second order kinetic model resulted in a better model fit. 33 Compared to MIP (MAA), the high initial sorption rate values (h) and low values of time required for the adsorption at (t 1/2 ) proved that the MIP(MAA-b-CD) was a better adsorbent. This might occur due to the presence of b-CD moiety in the internal surface of MIP (MAA-b-CD), which resulted in a broad pore diameter and lower pore volume of polymer matrix, proving that the super pores enhanced the mass transport for BzP analyte.…”

Section: Article Wileyonlinelibrarycom/appmentioning

confidence: 99%

“…Pseudo-first order (a first-order rate equation to describe the kinetic process of liquid-solid adsorption), pseudo-second order (the main assumptions were that the adsorption might be second-order, and the rate limiting step might be related to chemical adsorption involving valent forces through sharing or the exchange of electrons between the adsorbent and the metal ions), 32 and Elovich kinetic (to prove that the sorption was based on the chemisorption process) 33 models were applied to gain insight pertaining to the kinetics of adsorption process of BzP. The kinetic parameters calculated from the slopes and the intercepts of the plots from these models are listed in Table II.…”

Section: Adsorption Kineticsmentioning

confidence: 99%

Influence of polymer morphology on the adsorption behaviors of molecularly imprinted polymer‐methacrylic acid functionalized β‐cyclodextrin

Asman

Mohamad

Sarih

2015

J of Applied Polymer Sci

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The influence of molecularly imprinted polymer-methacrylic acid functionalized b-cyclodextrin (MIP(MAA-b-CD)) morphology on the adsorption behavior studies towards benzylparaben (BzP) was explored. The effects of time, concentration, and temperature towards BzP uptake were extensively evaluated. The adsorption performance of MIP(MAA-b-CD) was compared with that on the molecularly imprinted polymer-methacrylic acid (MIP(MAA)) synthesized without b-CD. The MIP(MAA-b-CD) was synthesized to obtain a spherical and spongy-porous texture with a broad pore size distribution. The MIP(MAA-b-CD) showed fast kinetic and the intra-particle diffusion model demonstrated a three step (surface and pore) adsorption process. The Koble-Corrigan isotherm was the most suitable model for data fitting, which indicated that MIP(MAA-b-CD) had homogeneous and heterogeneous surfaces. This finding clearly demonstrated that the large uptake and strong affinity of MIP(MAA-b-CD) did not only probably result from the monomer-template interactions, but also due to the morphological MIP(MAA-b-CD) structure. In contrary to MIP(MAA-b-CD), MIP(MAA) synthesized with uniform morphology and narrow pore size distribution had lower adsorption capacities and its kinetic data fitted the pseudo-second order diffusion model, indicating a two-step (surface only) adsorption process. The MIP(MAA) adsorption process followed the Langmuir isotherm model referred to solely homogeneous uptake. The calculated thermodynamic parameters showed that the BzP uptake was exothermic, spontaneous, and physisorption process onto MIPs, which supported the results of kinetics and isotherm adsorption data. This study clearly revealed that the presence of b-CD improved the morphology of synthesized MIP, and automatically enhanced the adsorption behavior of MIP.

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Removal of 2,4-dichlorophenol using cyclodextrin-ionic liquid polymer as a macroporous material: Characterization, adsorption isotherm, kinetic study, thermodynamics

Cited by 85 publications

References 56 publications

Selective removal of erythromycin by magnetic imprinted polymers synthesized from chitosan-stabilized Pickering emulsion

Selective removal of erythromycin by magnetic imprinted polymers synthesized from chitosan-stabilized Pickering emulsion

Theoretical and experimental studies on the separation of cinnamyl acetate and cinnamaldehyde by adsorption onto a β-cyclodextrin polyurethane polymer

Influence of polymer morphology on the adsorption behaviors of molecularly imprinted polymer‐methacrylic acid functionalized β‐cyclodextrin

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