Nanoporous Magnetic Cellulose–Chitosan Composite Microspheres: Preparation, Characterization, and Application for Cu(II) Adsorption

Peng, Shuai; Meng, Hecheng; Ouyang, Yan; Chang, Jie

doi:10.1021/ie402855t

Cited by 158 publications

(62 citation statements)

References 31 publications

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“…Kinetic data were treated with the pseudo‐second‐order kinetic model. The pseudo‐second‐order equation has been widely used due the excellent fit of the experimental data for the entire sorption period for many systems . The differential equation is shown in

\frac{d q_{t}}{d t} = k_{2} {(q_{e} - q_{t})}^{2}

where k 2 is the pseudo‐second‐order rate constant for the sorption process (g/mg min), and q e and q t are the amounts of metal ions adsorbed per gram of polymer (mg/g) at equilibrium and time t , respectively.…”

Section: Resultsmentioning

confidence: 99%

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Metal ion sorption by chitosan–tripolyphosphate beads

Giraldo

Rivas

Elgueta³

et al. 2017

J of Applied Polymer Sci

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Heavy metal removal from wastewater is crucial for the proper management of discharged water from mining operations. This residual water is typically unusable for other purposes such as for human/animal, crop, or industrial consumption. Eco‐friendly adsorption materials are necessary to ensure the sustainable treatment of this wastewater. Therefore, the sorption of Cu(II), Cd(II), Pb(II), and Zn(II) ions onto chitosan–tripolyphosphate (CTPP) beads was investigated using real mining wastewater and prepared ion metal solutions. The effects of pH, contact time, temperature, selectivity, and maximum sorption capacity in successive batches at different concentrations were studied. The optimum sorption of cations, except for copper (pH 3) was found at pH 5. Equilibrium in the adsorption of all metals was reached at 24 h of contact. Studies of the maximum sorption capacity at different concentrations showed that the CTPP beads could adsorb 158, 55, 47, and 47 mg/g of Pb(II), Cu(II), Cd(II), and Zn(II), respectively. Experimental data for the sorption of Pb(II) were optimally correlated with the Langmuir model. The thermodynamic parameters such as the changes in enthalpy (ΔH0), entropy (ΔS0), and free energy (ΔG0) were determined. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45511.

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\frac{d q_{t}}{d t} = k_{2} {(q_{e} - q_{t})}^{2}

Section: Resultsmentioning

confidence: 99%

“…The pseudo-second-order equation has been widely used due the excellent fit of the experimental data for the entire sorption period for many systems. [26][27][28] The differential equation is shown in…”

Section: Sorption Kineticsmentioning

confidence: 99%

Metal ion sorption by chitosan–tripolyphosphate beads

Giraldo

Rivas

Elgueta³

et al. 2017

J of Applied Polymer Sci

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“…The calculated adsorption capacities at equilibrium (

q_{normale}^{cal}

) for GO(20)/cellulose(100) hydrogel was 94.34 mg·g −1 , which was much higher than that of pristine cellulose hydrogels [37]. The value is much higher than those of acrylic acid-grafted and acrylic acid/sodium humate-grafted bamboo cellulose nanofibers (46.53 and 45.38 mg/g, respectively) [38] and cellulose/chitosan composite microspheres (65.8 mg/g) [39]. …”

Section: Resultsmentioning

confidence: 99%

Adsorption of Heavy Metals by Graphene Oxide/Cellulose Hydrogel Prepared from NaOH/Urea Aqueous Solution

et al. 2016

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By taking advantage of cellulose, graphene oxide (GO), and the process for crosslinking using epichlorohydrin (ECH), we propose a simple and novel method to prepare GO/cellulose hydrogel with good potential to adsorb metal ions. GO nanosheets containing carboxyl and hydroxyl groups were introduced into the surface of the cellulose hydrogel with retention of the gel structure and its nanoporous property. Due to the introduction of GO, the GO/cellulose composite hydrogels exhibited good compressive strength. Adsorption capacity of Cu2+ significantly increases with an increase in the GO/cellulose ratio and GO/cellulose hydrogel showed high adsorption rates. The calculated adsorption capacities at equilibrium (qnormalecal) for GO/cellulose hydrogel (GO:cellulose = 20:100 in weight) was up to 94.34 mg·g−1, which was much higher than that of the pristine cellulose hydrogels. Furthermore, GO/cellulose hydrogel exhibited high efficient regeneration and metal ion recovery, and high adsorption capacity for Zn2+, Fe3+, and Pb2+.

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“…Then, magnetic fluid was immediately added to the solution by vigorous agitation for 15 min. After several emulsion as reported in Peng et al[131], by slowly decreasing the temperature, the composite microspheres were obtained. The final NMCMs were washed three times with deionized water followed by washing thoroughly with ethanol.…”

mentioning

confidence: 97%

Characteristics and adsorption capacities of low-cost sorbents for wastewater treatment: A review

Gisi

Lofrano

Grassi

et al. 2016

Sustainable Materials and Technologies

932

528

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Low-cost by-products from agricultural, household and industrial sectors have been recognized as a sustainable solution for wastewater treatment. They allow achieving the removal of pollutants from wastewater and at same time to contribute to the waste minimization, recovery and reuse. Despite numerous reviews have been published in the last few years, a direct comparison of data obtained using different sorbents is difficult nowadays because of inconsistencies in the data presentation. In this context, the aim of the study was to revise the current literature concerning the application of low-cost adsorbents for wastewater treatment highlighting, systematically, both adsorbents characteristics and adsorption capacities. For this scope, low-cost sorbents have been divided into the following five groups: (i) Agricultural and household wastes, (ii) industrial by-products, (iii) sludge, (iv) sea materials, (v) soil and ore materials and (vi) novel low-cost adsorbents. The affinity of sorbents in removing various pollutants, their applications on real wastewater, costs and considerations on their reuse after adsorption processes, has been discussed. Finally, in order to better highlights the affinity of sorbents for more pollutants (dyes, heavy metals, biorecalcitrant compounds, nitrogen and phosphate compounds), simple methodological tools such as "adsorbentspollutants" matrices have been proposed and applied. In this manner, the adsorbent candidates for

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Nanoporous Magnetic Cellulose–Chitosan Composite Microspheres: Preparation, Characterization, and Application for Cu(II) Adsorption

Cited by 158 publications

References 31 publications

Metal ion sorption by chitosan–tripolyphosphate beads

Metal ion sorption by chitosan–tripolyphosphate beads

Adsorption of Heavy Metals by Graphene Oxide/Cellulose Hydrogel Prepared from NaOH/Urea Aqueous Solution

Characteristics and adsorption capacities of low-cost sorbents for wastewater treatment: A review

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