PEI-grafted magnetic cellulose for Cr(VI) removal from aqueous solution

Li, Yunhua; Zhu, Hongxiang; Zhang, Cunzhi; Cheng, Meixiao; He, Hui

doi:10.1007/s10570-018-1868-2

Cited by 57 publications

(15 citation statements)

References 43 publications

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“…These results suggest that the process controlling the adsorption rate may be chemical sorption involving valency forces through sharing or exchange of electrons between biosorbent and adsorbate. 56,65 Diffusion from the solid-liquid interface to the interior of the solid particles plays a very important role in adsorption. Fig.…”

Section: Kinetic Studiesmentioning

confidence: 99%

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Surface modification of biomaterials based on cocoa shell with improved nitrate and Cr(vi) removal

et al. 2020

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Section: Kinetic Studiesmentioning

confidence: 99%

“…Therefore, studying these isotherms is critical for optimizing the development of the adsorbent. 65,67 To optimize the design of an adsorption system, it is essential to establish the most appropriate correlation for the equilibrium curve (Fig. S4-S6 †).…”

Section: Kinetic Studiesmentioning

confidence: 99%

Surface modification of biomaterials based on cocoa shell with improved nitrate and Cr(vi) removal

et al. 2020

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“…156 Similarly, epichlorohydrin has been employed in a system of cellulose solution, PEI, and magnetic particles to create a crosslink between the cellulose and PEI. 179 The application of magnetic cellulose in devices like loudspeakers indeed is becoming a reality. However, cellulose may also have negative effects on the properties of the device due to its tendency to absorb moisture, which may have an impact on the stability of the device.…”

Section: Discussionmentioning

confidence: 99%

Magnetic cellulose: does extending cellulose versatility with magnetic functionality facilitate its use in devices?

Nypelö

2022

J. Mater. Chem. C

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“…The adsorption kinetics were analyzed by means of the pseudo‐first‐order, pseudo‐second‐order, and intraparticle diffusion model. Their linear forms are described in Equations ), respectively 31,32

Q_{t} = Q_{e} ((), 1 - e^{- k_{1} t})

Q_{t} = \frac{k_{2} Q_{e}^{2} t}{1 + k_{2} Q_{e} t}

Q_{t} = k_{id} t^{\frac{1}{2}} + C

where t is the adsorption time (min); Q e and Q t represent the amount of MB adsorbed at equilibrium and time t (mg g −1 ), respectively; k 1 , k 2 , and k id are the rate constants of the pseudo‐first‐order kinetics (min −1 ); pseudo‐second‐order kinetics (g mg −1 min −1 ), and intraparticle diffusion model (mg [g min 1/2 ] −1 ); and C is a constant involved in the thickness of the boundary layer of the intraparticle diffusion model (mg g −1 ).…”

Section: Methodsmentioning

confidence: 99%

“…Their linear forms are described in Equations (4)-(6), respectively. 31,32 Q t = Q e 1 −e − k 1 t À Á ð4Þ…”

Section: Adsorption Kinetics Modelingmentioning

confidence: 99%

Hydroxyethyl cellulose hydrogel modified with tannic acid as methylene blue adsorbent

Feng

Zhang

Kang

et al. 2020

J of Applied Polymer Sci

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This work developed an effective way to improve the methylene blue (MB) adsorption performance of cellulose-based hydrogel by modified with tannic acid (TA). HEC-co-p(AA-AM)/TA hydrogel was synthesized by grafting of acrylic acid (AA) and acrylamide (AM) onto hydroxyethyl cellulose (HEC), followed by modified with TA. Fourier transform infrared spectroscopy manifested that AA and AM were successfully grafted onto the hydrogel, and TA was immobilized in the hydrogel. Field emission scanning electron microscope demonstrated that the hydrogel after TA modification had a homogeneous pore structure. Brunauer-Emmett-Teller (BET) surface areas, total pore volume, and average pore diameters of the hydrogel are 11.821 m 2 g −1 , 0.0641 cm 3 g −1 , and 2.538 nm, respectively. The high swelling ratio (1179.2 g g −1 in deionized water) was in favor of the MB adsorption. The results of the adsorption experiments illustrated that HEC-cop (AA/AM) hydrogel had excellent MB adsorption performance. As the pH increases, the electrostatic attraction is enhanced, and the adsorption capacity is improved. The adsorption process was more fit with pseudo-second-order kinetics, and the maximum adsorption capacity (3438.27 mg g −1) was determined by Langmuir model. Thermodynamic studies suggested that the adsorption process is spontaneous, exothermic, and entropy reduction. X-ray photoelectron spectroscopy analysis confirmed that MB molecules were reacted with the oxygen atoms in hydroxyl and carboxyl groups by ion-exchange. High reusability demonstrated that the hydrogel could be a potential candidate for removal cationic dye from industrial effluents.

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PEI-grafted magnetic cellulose for Cr(VI) removal from aqueous solution

Cited by 57 publications

References 43 publications

Surface modification of biomaterials based on cocoa shell with improved nitrate and Cr(vi) removal

Surface modification of biomaterials based on cocoa shell with improved nitrate and Cr(vi) removal

Magnetic cellulose: does extending cellulose versatility with magnetic functionality facilitate its use in devices?

Hydroxyethyl cellulose hydrogel modified with tannic acid as methylene blue adsorbent

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