Porous CS monoliths and their adsorption ability for heavy metal ions

Xu, Fangqiang; Zhang, Nana; Long, Ying; Si, Youmiao; Liu, Yu; Mi, Xue; Wang, Xiaodong; Xing, Fubao; You, Xiao‐Zeng; Gao, Jianping

doi:10.1016/j.jhazmat.2011.01.094

Cited by 25 publications

(16 citation statements)

References 44 publications

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“…In this context, cellulose, starch, or chitosan are widely used to prepare adsorbents (Chen et al 2008;Li et al 2009;Tripathy et al 2009;Liu et al 2010;Zheng et al 2010;Wang et al 2011;Xu et al 2011). These naturally occurring biomacromolecules are abundantly available, biodegradable, and environmentally friendly (Irani et al 2011;Miretzky and Muñoz 2011).…”

Section: Introductionmentioning

confidence: 99%

Poly(amidoxime) from Polymer-Grafted Khaya Cellulose: An Excellent Medium for the Removal of Transition Metal Cations from Aqueous Solution

Rahman¹,

Sarkar²,

Yusoff³

et al. 2016

BioResources

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A free radical chain initiation reaction was exploited to prepare poly(acrylonitrile)-grafted Khaya cellulose. The synthesis of the poly(amidoxime) ligand was also performed using oximation reactions. Transition metal cations formed some complexes with the polymeric ligand. The pH of the solution played an important role in the optical detection of Cu 2+ ions. The highest absorbance (approximately 94%) of the [Cu-ligand] n+ complex was at pH 6. The sorption quantity increased with increasing Cu 2+ ion concentration, which was reflected by a broad peak at 600 nm that was attributed to the charge transfer (- transition) process. The equilibrium sorption capacity of 282 mg/g, with faster adsorption rates (t1/2 = 8 min), suggested that copper possessed excellent adsorption capacity compared with the other cations (Fe 3+ , Co 3+ , Cr 3+ , Ni 2+ , and Zn 2+ ). The sorption data for all of the cations followed the Freundlich isotherm model, with a high coefficient of determination, reflecting a heterogeneous sorption process by the cellulose-based, poly(amidoxime) adsorbent. The feasibility for recycling of adsorbent was evaluated by the sorption/ desorption study, and the results suggest that a new type adsorbent can be reused in seven cycles without any significant loss in its original sensing and removal performances.

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Section: Introductionmentioning

confidence: 99%

Poly(amidoxime) from Polymer-Grafted Khaya Cellulose: An Excellent Medium for the Removal of Transition Metal Cations from Aqueous Solution

Rahman¹,

Sarkar²,

Yusoff³

et al. 2016

BioResources

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“…(2) The high surface area and porous structure of PE-MA-NN increased the adsorption sites, which were beneficial to Pb(II) adsorption. 24 Figure 7, the adsorption capacity of PE-MA-NN for Pb(II) increases as the temperature increases. This might be explained as follows: (i) the interactions between Pb(II) and the amine/ amide groups of PE-MA-NN were strong at higher temperatures, and (ii) the rise of temperature could accelerate the transport of Pb(II) from the bulk to the surface-bound phase, which would result in more uptake of Pb(II) from the solute.…”

Section: Adsorption Kinetics Of Pb(ii)mentioning

confidence: 98%

A New Porous Chelating Fiber: Preparation, Characterization, and Adsorption Behavior of Pb(II)

Wang

Cheng

Yang

et al. 2013

Ind. Eng. Chem. Res.

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A new porous chelating fiber (PE-MA-NN) was prepared with polyethylene for the removal of Pb(II) from water. Scanning electron microscopy (SEM), contact angle, Brunauer−Emmett−Teller (BET) surface area, Fourier transform infrared (FT-IR), and 13 C nuclear magnetic resonance ( 13 C NMR) were used to characterize PE-MA-NN. The batch kinetic study indicated that the adsorption of Pb(II) could be well-fitted by a pseudo-second-order equation, suggesting intraparticle diffusion process as the rate-limiting step of the adsorption process. By using the Elovich equation, the initial adsorption rate of Pb(II) onto PE-MA-NN was calculated to be 394.084 mg (g min) −1 . The Langmuir equation fit the experimental data well, and the monolayer saturation adsorption value was more than 500 mg g −1 for Pb(II). When the temperature was increased within the range of 278−308 K, the adsorption entropy changes of PE-MA-NN were from ∼95.30 J mol −1 K to ∼96.01 J mol −1 K. Although the presence of Ca 2+ in solution had a negligible effect on the removal of Pb(II), PE-MA-NN could retain over 90% of its adsorption capacity, even if the Ca 2+ concentration was up to 280 mg L −1 . Both 1 M HCl and 0.1 M EDTA solution could be used as effective eluants to desorb the Pb(II) that has been adsorbed by PE-MA-NN, and the adsorption capacity could still be maintained at a high level at the fifth cycle.

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“…The desorption of Cu 2+ from the blend monolith is vital in considering practical chelation applications of the blend monolith (Xu et al, 2011). Fig.…”

Section: Adsorption and Desorption Of Heavy Metal Ionsmentioning

confidence: 99%

“…Generally, chitosan-based materials with macroporous structure in the type of bead (Fu et al, 2006;Mi, Shyu, Chen, & Lai, 2001), gel (Cooney et al, 2008;Kathuria, Tripathi, Kar, & Kumar, 2009), foam (Zhang et al, 2014), and membrane (Orrego & Valencia, 2009) were prepared by using the methods such as freeze-drying, phaseinversion, or porogen-leaching. In contrast, little research was done on the fabrication of chitosan-based monolithic materials (Xu et al, 2011). Most importantly, a mesoporous structure has never been achieved in those materials.…”

Section: Introductionmentioning

confidence: 99%

Facile fabrication of mesoporous poly(ethylene- co -vinyl alcohol)/chitosan blend monoliths

Wang

Xin

Uyama

2015

Carbohydrate Polymers

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Porous CS monoliths and their adsorption ability for heavy metal ions

Cited by 25 publications

References 44 publications

Poly(amidoxime) from Polymer-Grafted Khaya Cellulose: An Excellent Medium for the Removal of Transition Metal Cations from Aqueous Solution

Poly(amidoxime) from Polymer-Grafted Khaya Cellulose: An Excellent Medium for the Removal of Transition Metal Cations from Aqueous Solution

A New Porous Chelating Fiber: Preparation, Characterization, and Adsorption Behavior of Pb(II)

Facile fabrication of mesoporous poly(ethylene- co -vinyl alcohol)/chitosan blend monoliths

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