Preparation and characterization of a novel polyethyleneimine cation-modified persimmon tannin bioadsorbent for anionic dye adsorption

Li, Xiaojuan; Wang, Zhongmin; Ning, Jingliang; Gao, Mingmin; Jiang, Wanquan; Zhou, Zhide; Li, Guiyin

doi:10.1016/j.jenvman.2018.03.107

Cited by 88 publications

(17 citation statements)

References 43 publications

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“…This implies that each MB and MO molecule had to displace more than one water molecule from the adsorbent surface before being adsorbed. Similar results have been reported in the literature [62,63], where the authors indicated that adsorption is based on endothermic process and favorable at high temperature, while the positive values of ΔS0 are indicative of increased randomness at the adsorbent–adsorbate interphase during the decolorization phenomenon, and the degree of dispersion of the process increased with increased temperature. The negative values of ΔG0 demonstrate the spontaneity and feasibility of MB and MO decolorization at various temperatures [64].…”

Section: Resultssupporting

confidence: 90%

Functional Chitosan Derivative and Chitin as Decolorization Materials for Methylene Blue and Methyl Orange from Aqueous Solution

et al. 2019

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Dyes are classified as one of the major pollutants of water. They have negative impacts not only on environment but also on human health. In fact, wastewater that contains these harmful substances requires many types of treatments. Therefore, alternative methods and adsorption agents are needed. Herein, we propose to evaluate the decolorization of methylene blue (MB) and methyl orange (MO) as two models of soluble dyes from water using chitin and chitosan-graft-polyacrylamide. Furthermore, the applicability of these biomacromolecules as alternative adsorption agents, their sticking probability and desorption were also examined. Experimental parameters such as dye concentration, contact time, pH solution, adsorbent dosage and temperature were thoroughly examined for the grafted chitosan and chitin. The activation energy (Ea) and the thermodynamic variables (i.e., standard Gibb’s free energy (ΔG0), standard enthalpy (ΔH0), and standard entropy (ΔS0)) were determined using the Van’t Hoff and Arrhenius equations. The sticking probability (S*) model for MB and MO removal by chitin and the chitosan derivative demonstrated that both dyes were successfully removed under the proposed conditions. Desorption studies of MB and MO showed the reusability of both materials, suggesting their application for removing dyes from aqueous solution.

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Section: Resultssupporting

confidence: 90%

Functional Chitosan Derivative and Chitin as Decolorization Materials for Methylene Blue and Methyl Orange from Aqueous Solution

et al. 2019

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“…3.9 | Adsorption mechanism Figure 10 shows the FTIR spectrums of MB, THAM-2 gels before and after MB adsorption. In the spectrums of THAM-2 gels after MB adsorption, there are new peaks appeared at 1670 cm −1 , 1050 cm −1 , and 1508 cm −1 belonged to stretching vibration of C N, 35 heterocyclic vibration of S C 65 and symmetry bending vibration of CH 3 , 66 respectively, which are the characteristic IR absorption peaks of MB. These results indicate MB molecules were adsorbed on THAM-2 gels.…”

Section: Reusabilitymentioning

confidence: 97%

“…It can be seen from the spectrum of TA and THAM-2 gels that the adsorption peak of 1448 cm −1 is the skeletal vibration of benzene ring from TA, indicating that TA was immobilized in the THAM-2 gels. 35 From the spectrum of HAM, the peak of 1589 cm −1 and 1398 cm −1 are derived from the antisymmetric stretching vibration of COO − in AA and the stretching vibration of C N in AM, respectively. 36,37 However, the peak of COO − and C N are shifted to 1575 and 1409 cm −1 in the spectrum of THAM-2 gels.…”

Section: Fourier Transform-infrared Spectroscopymentioning

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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“…The calculation of the adsorbed amount (qe, mg/g) indicates the quantity of adsorbent that was adsorbed in function of the mass of adsorbent. It was calculated through Equation 1 (LI et al, 2018):…”

Section: Calculation Od Adsorbed Amountmentioning

confidence: 99%

Evaluation of the rubber seed shell (hevea brasiliensis) as an adsorbent: kinetic study

Carneiro

Megale

Catunda

et al. 2019

BJD

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Preparation and characterization of a novel polyethyleneimine cation-modified persimmon tannin bioadsorbent for anionic dye adsorption

Cited by 88 publications

References 43 publications

Functional Chitosan Derivative and Chitin as Decolorization Materials for Methylene Blue and Methyl Orange from Aqueous Solution

Functional Chitosan Derivative and Chitin as Decolorization Materials for Methylene Blue and Methyl Orange from Aqueous Solution

Hydroxyethyl cellulose hydrogel modified with tannic acid as methylene blue adsorbent

Evaluation of the rubber seed shell (hevea brasiliensis) as an adsorbent: kinetic study

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