Adsorption of chromium (VI) from aqueous solutions by cellulose modified with β-CD and quaternary ammonium groups

Zhou, Yanmei; Jin, Qiang; Zhu, Tao; Akama, Yoshifumi

doi:10.1016/j.jhazmat.2011.01.025

Cited by 119 publications

(52 citation statements)

References 27 publications

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“…A number of functional groups, including carboxylate, hydroxyl, sulfate, phosphate, amide, and amino groups, have been found to be effective in metal sorption [8,9]. Among these, the amine group is very effective for removing heavy metals.…”

Section: Introductionmentioning

confidence: 99%

Interactions of bentonite clay in composite gels of non-ionic polymers with cationic surfactants and heavy metal ions

et al. 2014

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Chemically cross-linked composite gels based on bentonite clay from Manyrak deposit (Kazakhstan Republic) and nonionic polymers, i.e., poly(hydroxyethylacrylate) and poly(acrylamide), were polymerized in situ after preliminary intercalation of monomers in an aqueous suspension of bentonite clay. By means of cryo-scanning electron microscopy, it was shown that bentonite clay is well incorporated into the gel network structure with pore sizes up to 1.5 μm. The intercalated bentonite clay can adsorb cationic surfactants as well as heavy metal ions due to electrostatic interactions. Conductometric and surface tension measurements indicate not only the adsorption of surfactants and heavy metals inside the hydrogel, but also the displacement of the critical micellization concentration (CMC) of the surfactants.

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Section: Introductionmentioning

confidence: 99%

Interactions of bentonite clay in composite gels of non-ionic polymers with cationic surfactants and heavy metal ions

et al. 2014

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“…Several studies of chemical surface modification of cellulose have been published. Zhou et al [13] modified cellulose with b-CD and quaternary ammonium groups to removal Cr(VI) from aqueous solutions. Gurgel et al [14,15] modified cellulose by succinic anhydride to treat with heavy ions.…”

Section: Introductionmentioning

confidence: 99%

Heavy metal ions and organic dyes removal from water by cellulose modified with maleic anhydride

et al. 2012

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A novel type of adsorbent (CM) was synthesized by cellulose modified with maleic anhydride to remove heavy metal ions and organic dyes in this work. The synthesized adsorbent was characterized by FTIR, SEM, TGA and XRD. The degree of carboxyl group of CM was found to be 2.7 mmol g -1 by the titration method. The adsorption of Hg(II) ions as heavy metal ions while basic fuchsine, methylene blue and crystal violet as organic dyes by CM was investigated. The influence of different experimental parameters such as pH, contact time, temperature on removal process was evaluated. The results indicated that the CM has a good adsorption capacity for Hg(II). The maximum adsorption capacity of Hg(II) was found to be 172.5 mg g -1 , and the adsorption process was described by Freundlich isotherm model of adsorption well. The process of basic fuchsine, methylene blue and crystal violet adsorbed by CM was also studied and the adsorption removal rate of those organic dyes was 88.10, 98.47 and 92.85 % under the optimum conditions, respectively. The adsorption process was depicted by the Langmuir isotherm model more correctly.

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“…The band at 3021 cm −1 corresponds to deformation vibration of CH in epoxy group. The bands at 1491 and 1190 cm −1 correspond to CN vibration of N + (CH 3 ) 3 Cl − . The bands at1421 and 1378 cm −1 correspond to symmetric deformation vibration of CH in N + (CH 3 ) 3 .…”

Section: Resultsmentioning

confidence: 96%

Study on quaternary ammonium modified tentacle‐type cellulose beads and its adsorption for

Zhang

Zhou

Xie

et al. 2014

J of Applied Polymer Sci

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A novel anion exchange resin based on cellulose has been prepared to adsorb Ag true(CN true)2− for the urgent demand of silver and the high toxicity of metal‐cyanide complexes. Quaternary ammonium groups were grafted onto cellulose beads as main active sites in tentacle‐type through a series of chemical reactions. The substitution degree of each reaction was determined to be about 0.854, 2.125, and 2.899 mmol g−1, respectively. The resin exhibited excellent spherical shape with microporous structure by the observation of optical microscopy and scanning electron microscope. Moreover, the adsorption experiments demonstrated the adsorption was fast in alkaline condition. Fitting the data into isotherm and kinetic models gave the conclusion that the adsorption behavior matched better with Langmuir model and pseudo‐second‐order kinetic in initial time followed pseudo‐first‐order kinetic model in later phase. The equilibrium adsorption capacity was determined to be 3.016 mmol g−1. With the advantages of high capacity, short equilibrium time, and alkaline resistance, the resin would be considered to a top‐priority adsorbent for the separation of Ag true(CN true)2−. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40987.

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Adsorption of chromium (VI) from aqueous solutions by cellulose modified with β-CD and quaternary ammonium groups

Cited by 119 publications

References 27 publications

Interactions of bentonite clay in composite gels of non-ionic polymers with cationic surfactants and heavy metal ions

Interactions of bentonite clay in composite gels of non-ionic polymers with cationic surfactants and heavy metal ions

Heavy metal ions and organic dyes removal from water by cellulose modified with maleic anhydride

Study on quaternary ammonium modified tentacle‐type cellulose beads and its adsorption for

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