Synthesis and characterization of a functionalized graft copolymer of densified cellulose for the extraction of uranium(VI) from aqueous solutions

Anirudhan, T.S.; Sreekumari, S

doi:10.1016/j.colsurfa.2010.03.031

Cited by 56 publications

(14 citation statements)

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“…The pH of the dye solution is an important factor for the adsorption process, influencing the surface charge of the adsorbent, which consequently affects adsorption capacity [37,38]. DCMC 3 provided better results for the adsorption experiment at pH = 3, compared with the other samples.…”

Section: Effect Of Phmentioning

confidence: 99%

A Novel Cellulose-Based Polymer for Efficient Removal of Methylene Blue

et al. 2020

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A novel cellulose-based cross-linked polymer, dicarboxymethyl cellulose (DCMC), has been synthesized and used for methylene blue (MB) removal. Inductively coupled plasma atomic emission spectrometry (ICP-AES), Fourier-transform infrared spectroscopy (FTIR), nitrogen porosimetry, and optical microscopy were employed to characterize the structure of the cellulose-based adsorbent. The number of carboxylate groups per gram of polymer (CG) was calculated with sodium content determined by ICP-AES. Systematic equilibrium and kinetic adsorption studies were performed to assess the polymer suitability for dye removal. The effect of pH on its adsorption capacity was also studied and the equilibrium adsorption data was analyzed using Langmuir, Freundlich, and Sips isotherms. At pH = 3, the adsorption isotherms followed the Langmuir model with a maximum adsorption capacity of 887.6 mg/g. At pH = 6.4, the adsorption isotherms produced S-shape curves and were best fitted with the Sips model. The maximum MB uptake increased to 1354.6 mg/g. Pseudo first-order and second-order models were used to fit the kinetic data. A pseudo second-order kinetic model provided the best correlation for the adsorption of MB onto DCMC. Adsorption coupled with membrane filtration achieved 95% methylene blue removal and DCMC can be successfully regenerated and reused in consecutive experiments.

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Section: Effect Of Phmentioning

confidence: 99%

A Novel Cellulose-Based Polymer for Efficient Removal of Methylene Blue

et al. 2020

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“…It provides higher driving force that facilitates diffusion of ions from the bulk solution to active sites assembly. Thus the initial U(VI) concentration plays an important role in determining the maximum uptake capacity of the CTF for U(VI) [50].…”

Section: Effect Of Contact Time and Adsorption Dynamicsmentioning

confidence: 99%

CeO2–TiFe2O4 nanocomposite for effective removal of uranium ions from aqueous waste solutions

et al. 2019

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The present work deals with the preparation of Cerium oxide Titanium Ferrite (CTF) nanocomposite using a simple solvothermal method. The synthesized CTF nanocomposites were characterized using FT-IR, XRD, BET surface area, VSM and TEM. The adsorption action of CTF nanocomposite towards U(VI) was optimized using batch experiments by varying solution pH, initial concentration, sorbent dosage and rate of adsorption. The loaded uranium was efficiently desorbed using 0.1 M HNO 3. The Kinetic studies indicated that the adsorption process follows pseudo-second-order equation. Freundlich and Halsey adsorption isotherm was modeled, it proves the multilayers adsorption process. The calculated thermodynamic parameters show that the adsorption process of U(VI) onto CTF nanocomposite was spontaneous and endothermic in nature. The fabricated nanocomposite was applied successfully for removal of uranium species from waste solutions. The obtained results indicated that CTF nanocomposite was a promising and excellent adsorbent for uranium ions removal in comparison with other reported ones. Moreover, the process was very simple, fast and easily reusable several times.

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“…The adsorbent was prepared as reported in our previous paper (Anirudhan and Sreekumari 2010). The graft copolymerization of MA onto TDC was carried out in water using MnO 2 /citric acid redox system (Zahran and Rehan 2006).…”

Section: Preparation Of the Cation Exchangermentioning

confidence: 99%

Preparation of poly(methacrylic acid)-grafted TiO₂-densified cellulose as an adsorbent for the removal of copper(II) ions from aqueous solutions and industrial effluents

Anirudhan

Sreekumari

Jalajamony

2012

Toxicological & Environmental Chemistry

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The aim of this work is to evaluate the adsorption performance of a carboxylatefunctionalized graft copolymer of TiO 2 -densified cellulose (PGTDC-COOH) for copper ions removal from aqueous solutions and industrial effluents. The chemical modification was confirmed by infrared spectroscopy and X-ray diffraction. The adsorption experiments were conducted in a batch adsorption technique. The influence of different experimental parameters such as pH, contact time, adsorbent dose, and Cu(II) concentration was investigated. The optimum pH for Cu(II) adsorption was observed at pH 5.0 and the equilibrium was reached in 1 h. Kinetic data was analyzed using pseudo-first-order and pseudosecond-order equations and showed better fit with pseudo-second-order equation. The equilibrium isotherm data correspond to the Langmuir model. The maximum binding capacity, Q 0 was found to be 75.82 mg L À1 with binding constant, b ¼ 0.036 L mg À1 at 30 C and pH 5.0. Utility of the adsorbent was tested by removing Cu(II) from electroplating industry wastewater. The adsorbed Cu(II) ions were desorbed effectively by 0.1 M HCl solution. The results illustrate that PGTDC-COOH can be effectively used for the removal of copper ions from aqueous solutions.

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Synthesis and characterization of a functionalized graft copolymer of densified cellulose for the extraction of uranium(VI) from aqueous solutions

Cited by 56 publications

References 32 publications

A Novel Cellulose-Based Polymer for Efficient Removal of Methylene Blue

A Novel Cellulose-Based Polymer for Efficient Removal of Methylene Blue

CeO2–TiFe2O4 nanocomposite for effective removal of uranium ions from aqueous waste solutions

Preparation of poly(methacrylic acid)-grafted TiO₂-densified cellulose as an adsorbent for the removal of copper(II) ions from aqueous solutions and industrial effluents

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Synthesis and characterization of a functionalized graft copolymer of densified cellulose for the extraction of uranium(VI) from aqueous solutions

Cited by 56 publications

References 32 publications

A Novel Cellulose-Based Polymer for Efficient Removal of Methylene Blue

A Novel Cellulose-Based Polymer for Efficient Removal of Methylene Blue

CeO2–TiFe2O4 nanocomposite for effective removal of uranium ions from aqueous waste solutions

Preparation of poly(methacrylic acid)-grafted TiO2-densified cellulose as an adsorbent for the removal of copper(II) ions from aqueous solutions and industrial effluents

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Preparation of poly(methacrylic acid)-grafted TiO₂-densified cellulose as an adsorbent for the removal of copper(II) ions from aqueous solutions and industrial effluents