Robust polymeric hydrogel using rod‐like amidodiol as crosslinker: Studies on adsorption kinetics and mechanism using dyes as adsorbate

Narayanan, Rohini Kuttiplavil; Nethran, Navya Kuttamassery; Devaki, Sudha J.; Rao, T. Prasada

doi:10.1002/app.40908

Cited by 12 publications

(7 citation statements)

References 33 publications

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“…17 The chelation is some kind of chemical interaction, which is apparently stronger than physical adsorption between inorganic carrier and metal ions. Besides, it has been reported that silica−chitosan hybrid materials exhibit an enhanced mechanical property compared with other hybrid materials because of addition of silica, 18,19 so the silica/chitosan hybrid material is a good choice of support for noble metal nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Silica/Chitosan Core–Shell Hybrid-Microsphere-Supported Pd Catalyst for Hydrogenation of Cyclohexene Reaction

Chen

et al. 2017

Ind. Eng. Chem. Res.

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This paper presents a simple microfluidic method to prepare monodispersed palladium nanoparticles supported on silica/ chitosan core−shell hybrid microspheres. Because a large amount of −NH 2 provided by chitosan has a strong force with metal ions, Pd nanoparticles loaded on the microspheres kept monodispersed and had a mean diameter of only 2−3 nm. In addition, the core−shell structure indicating that the chitosan was mainly distributed on the shell of the microspheres results in that palladium is mainly loaded on the shell too, which can effectively reduce mass transfer distance between reactant and catalyst. Therefore, the supported Pd catalyst showed a superb catalytic performance through the hydrogenation of cyclohexene. Furthermore, silica/chitosan-supported catalyst can be reused many times without an obvious loss of its activity, and it will have promising application in other similar hydrogenation reactions.

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Section: Introductionmentioning

confidence: 99%

Silica/Chitosan Core–Shell Hybrid-Microsphere-Supported Pd Catalyst for Hydrogenation of Cyclohexene Reaction

Chen

et al. 2017

Ind. Eng. Chem. Res.

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“…This was observed even for high values of 1/n, which can reach about ten (between 2 and 12) (Gu and Zhu 1990, Yurdakoç, Seki et al 2005, Khandelwal, Narayanan et al 2020. This correspondence can be attributed, at low concentrations, to the difference between the force of diffusionswelling of solvent versus the force of concentration gradient and mass transfer of solute (Kaşgöz and Durmus 2008, Narayanan, Nethran et al 2014, Bai, Zhang et al 2016, Du and Piao 2018, Saraydın, Işıkver et al 2018.…”

Section: Adsorption Isothermsmentioning

confidence: 87%

New Cellulose based pH-Sensitive Hydrogel for Highly Efficient Dyes Removal in Water Treatment: Kinetic, Thermodynamic, Theoretical and Computational Studies

Jabir

El-Hammi

Nor

et al. 2021

Preprint

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In this paper, a new green pH-sensitive cellulose based hydrogel (swelling rate ~ 1005 %) was successfully elaborated. However, the new EDTA crosslinked HEC was investigated as adsorbent materiel, which it showed high removal efficiency (~2000 mg.g-1) to aquatic micropollutants, especially methylene blue as cationic dyes model. The synthesis of HEC-EDTA at high advanced crosslinking degree (up to 92 %) that confirmed using structural analyzes (FTIR and 13C CP/MAS-NMR), was cried out using DAEDT and DMAP as acyl transfer agent, where the lamellar morphology (2D- microstructure) was highly suggested basing on the average functionality of the reaction system. The kinetic study showed that the adsorption process was better described by pseudo-second-order kinetic, where the thermodynamic parameters exhibited a negative effect of temperature indicating a physical adsorption process. In addition, the adsorption capacity was studied according to the experimental conditions (pH, contact time, concentration, etc.), and the Freundlich model revealed a strong correlation to the experimental results indicating an energetic heterogeneity of the surface active sites. In the other hand, molecular dynamics (MD) simulations were conducted and optimized using COMPASS II, where the results showed a good agreement with the experiment, and that basing on the intermolecular Non-covalent interaction, molecular structure and cluster configurations.

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“…Gile's plot showed that 1 gram of Dext-g-poly(AMPS-co-AA) polymer can adsorb upto 164 mg of dimethoate, 149 mg of phosalone, and 136 mg of chlorpyrifos. [76,77] 3.12 | Thermodynamic parameters Adsorption thermodynamic parameters, namely Gibbs free energy change (ΔG O Þ, enthalpy change ΔH O À Á , and entropy change (ΔS O Þ for the adsorption of studied pesticides onto the polymer are calculated using the following Van't Hoff equation:…”

Section: Nature Of Adsorption Isotherm Using Gile's Modelmentioning

confidence: 99%

Adsorption of toxic organophosphorus pesticides from aqueous medium using dextrin‐graft‐poly(2‐acrylamido‐2‐methyl propane sulfonic acid‐co‐acrylic acid) copolymer: Studies on equilibrium kinetics, isotherms, and thermodynamics of interactions

Ray

Samanta

Tripathy

2021

Polymer Engineering & Sci

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A graft copolymer was prepared by grafting a mixture of 2-acrylamido-2-methyl propane sulfonic acid (AMPS) and acrylic acid (AA) monomers onto the dextrin polysaccharide backbone by free radical copolymerization technique using potassium peroxydisulfate as an initiator in water medium. Several characterization techniques like FT-IR, 1 H and 13 C NMR, XRD, SEM, and EDAX analyses were used to characterize the synthesized polymer. The polymer was used as an efficient adsorbent for the removal of toxic pesticides namely dimethoate (DM), chlorpyrifos (CP), and phosalone (PL) from their aqueous solutions. Various operating variables such as kinetic, isotherm, and thermodynamic parameters were investigated for the three pesticides. The pesticide adsorption process over polymer surface was directed by pseudo-secondorder kinetic model. Langmuir and Dubinin-Radushkevich isotherms both correlate well with the equilibrium data. Maximum adsorption capacity (q m ) of the polymer was found to be 172.4 mg g À1 for DM, 121.95 mg g À1 for PL, and 108.69 mg g À1 for CP. Thermodynamic parameters showed that the selected pesticides' adsorption onto the polymers was a spontaneous and endothermic process. The preferential pesticide sorption by the graft copolymer followed the order DM > PL > CP.

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Robust polymeric hydrogel using rod‐like amidodiol as crosslinker: Studies on adsorption kinetics and mechanism using dyes as adsorbate

Cited by 12 publications

References 33 publications

Silica/Chitosan Core–Shell Hybrid-Microsphere-Supported Pd Catalyst for Hydrogenation of Cyclohexene Reaction

Silica/Chitosan Core–Shell Hybrid-Microsphere-Supported Pd Catalyst for Hydrogenation of Cyclohexene Reaction

New Cellulose based pH-Sensitive Hydrogel for Highly Efficient Dyes Removal in Water Treatment: Kinetic, Thermodynamic, Theoretical and Computational Studies

Adsorption of toxic organophosphorus pesticides from aqueous medium using dextrin‐graft‐poly(2‐acrylamido‐2‐methyl propane sulfonic acid‐co‐acrylic acid) copolymer: Studies on equilibrium kinetics, isotherms, and thermodynamics of interactions

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