Removal of anionic azo dyes from aqueous solutions by quaternary ammonium salt-functionalized fibers with adjustable surface microenvironments

Zhao, Jingyan; Wang, Lu; Xiao, Jian; Tao, Minli; Zhang, Wenqin

doi:10.1016/j.reactfunctpolym.2020.104684

Cited by 17 publications

(6 citation statements)

References 62 publications

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“…The variation law of R (%) of Q-LSP to MB against pH is similar that of LSP to other cationic dye, [12] and the variation law of R (%) of Q-LSP to CR against pH agrees with that of other quaternization adsorbents to anionic ion. [23,24,32] The variation laws of R (%) of Q-LSP to MB and CR against pH agree with that of carboxyl and quaternary ammonium group modified wheat straw to cationic dye MB and anionic dye AG25. [33] The Figure 5(b) illustrated the effect of dosage of Q-LSP on its R (%) to MB and CR.…”

Section: Effect Of Ph and Dosage On Adsorption Of Q-lspmentioning

confidence: 60%

“…The results show that the introduction of quaternary ammonium group in LSP does not affect the adsorption capacity of LSP for MB, on the contrary, greatly improves the adsorption capacity of Q-LSP for CR. Adsorption of Q-LSP to MB should give the credit to the electrostatic attraction between the sulfonic acid group in Q-LSP and MB, [4,5,6,12] and adsorption of Q-LSP to CR should attribute to the electrostatic attraction between the quaternary ammonium group in Q-LSP and CR, [23,24] Duan et al [25] and Song et al [26] also reported that electrostatic attraction was involved in adsorption of positively charged amine group to anion dyes methyl orange. Moreover, H-bond between the oxygen atom of sulfonic acid group in Q-LSP and nitrogen atom of CR could be involved in the adsorption of Q-LSP to CR.…”

Section: Adsorption Performance Of Q-lspmentioning

confidence: 99%

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Quaternary Ammonium Functionalized Lignosulfonate for Simultaneous Adsorption of Anionic/Cationic Dyes and Desinfection

et al. 2021

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Although various adsorbents have been developed for sewage treatment, only a few adsorbents can simultaneously adsorb anions/cations and disinfect. In this work, a quaternary lignosulfonate (Q-LSP) was prepared, which can not only simultaneously adsorb anion and cation pollution, but also disinfect. FT-IR, XPS were employed to confirm successful preparation of Q-LSP. The Q-LSP adsorbs cationic dye methylene blue (MB) and anionic dye Congo red (CR) favorably, and the maximum q e of Q-LSP to MB and CR are 153 and 324 mg/g respectively according to Langmuir isotherm model. The Langmuir isotherm and pseudo-second-order kinetic models are more suitable to describe the adsorption process of MB and CR on Q-LSP. In binary system containing MB and CR, Q-LSP can simultaneously adsorb MB and CR, with MB adsorbed preferentially. The Q-LSP loaded MB or CR is easily regenerated, and the adsorption properties of regenerated Q-LSP only decreases by 9.2 % to CR and 9.6 % to MB respectively after 4 desorption-resorption cycles. Moreover, the Q-LSP can disinfect by leaking endogenous chemicals. Therefore, the Q-LSP can be used as a new adsorbent possessing performance of simultaneously adsorbing anionic/cationic pollutants and bactericidal activities.

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Section: Effect Of Ph and Dosage On Adsorption Of Q-lspmentioning

confidence: 60%

Section: Adsorption Performance Of Q-lspmentioning

confidence: 99%

Quaternary Ammonium Functionalized Lignosulfonate for Simultaneous Adsorption of Anionic/Cationic Dyes and Desinfection

et al. 2021

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“…This is similar to the phenomenon observed for another cationized cellulose nanofiber [ 42 ]. The state of the nanofiber surface charge will most likely affect its adsorption performance for anionic contaminants in water [ 41 , 45 ].…”

Section: Resultsmentioning

confidence: 99%

“…Since neither PFO nor PSO kinetic describe the process of diffusion, the Weber-Morris intraparticle diffusion model was also used to explain the adsorption process. The Weber-Morris intraparticle diffusion equation is as follows [ 45 ]:

where K i [mg/(g·min 0.5 )] is the rate constant of intraparticle diffusion; C is the constant related to the thickness of the boundary layer, which is in direct ratio to the effect of the boundary layer.…”

Section: Resultsmentioning

confidence: 99%

Cationic Lignocellulose Nanofibers from Agricultural Waste as High-Performing Adsorbents for the Removal of Dissolved and Colloidal Substances

et al. 2022

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The accumulation of dissolved and colloidal substances (DCS) in the increasingly closed paper circulating water system can seriously lower the productivity and safety of papermaking machines, and it has been a challenge to develop an adsorbent with low cost, high adsorption efficiency and large adsorption capacity for DCS removal. In this study, cationic lignocellulose nanofibers (CLCNF) were obtained by cationic modification of agricultural waste bagasse in deep eutectic solvents (DES) followed by mechanical defibrillation, and then CLCNF were employed as an adsorbent for DCS model contaminant polygalacturonic acid (PGA) removal. CLCNF was characterized by transmission electron microscopy, Fourier transform infrared, elemental analysis, X-ray diffraction, and thermogravimetric analysis. The analytical results confirmed the successful preparation of CLCNF with 4.6–7.9 nm diameters and 0.97–1.76 mmol/g quaternary ammonium groups. The effects of quaternary ammonium group contents, pH, contact time and initial concentration of PGA on the adsorption were investigated in a batch adsorption study. According to the results, the cationic modification significantly enhanced the adsorption of PGA by CLCNF and the adsorption performance increased with the increase of the quaternary ammonium group contents. The adsorption of PGA on CLCNF followed the pseudo-second-order and the fitted Langmuir isotherm model. The adsorption showed fast initial kinetics and the experimental maximum adsorption capacity was 1054 mg/g, which is much higher than PGA adsorbents previously reported in the literature. Therefore, CLCNF with high cationic group content developed in this paper is a promising adsorbent for DCS removal.

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“…For example, selective dye adsorption by UiO-66 MOF [ 13 ], adsorption of heavy metal ion Cr(VI) on UiO-66-NH 2 MOFs [ 14 ], or chemical fixation of CO 2 by amine functionalized MOF [ 15 ] have been reported. Modifying a material with some functional groups can be one of the main methods of achieving efficient surfactant adsorption [ 16 ]. At present, the volume of wastewater including surfactants that need treatment is excessive, and thus we still need to explore adsorption methods that achieve stronger adsorption capacity with cheaper raw materials.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of an Anionic Surfactant (Sodium Dodecyl Sulfate) from an Aqueous Solution by Modified Cellulose with Quaternary Ammonium

et al. 2022

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In this study, a method of removing an anionic surfactant sodium dodecyl sulfate (SDS) from an aqueous solution by cellulose modified with quaternary ammonium cation was discussed. Cellulose, as the adsorbent, was obtained from medical cotton balls, and the quaternary ammonium cation (synthesized from dodecyl dimethyl tertiary amine and epichlorohydrin) was grafted onto the sixth hydroxyl group of D-glucose in the cellulose by the Williamson reaction under alkaline conditions. The modified cellulose was characterized by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS); and the zeta potential of the material was also measured after confirmation of the synthesis of quaternary ammonium salts by nuclear magnetic resonance (NMR). From these analyses, a peak of the quaternary ammonium group was observed at 1637 cm−1; and it was found that the surface of the material exhibited a positive charge in pH 2–7. The optimal conditions for SDS adsorption by modified cellulose were pH of 7, contact time of 3 h, and temperature of 60 °C in this study. Typical adsorption isotherms (Langmuir and Freundlich) were determined for the adsorption process, and the maximal adsorption capacity was estimated as 32.5 mg g−1. The results of adsorption kinetics were more consistent with the pseudo-second-order equation, indicating that the adsorption process was mainly controlled by chemical adsorption. Furthermore, thermodynamic analysis indicated that the adsorption process of SDS on the modified cellulose was endothermic and spontaneous and that an increasing temperature was conducive to adsorption.

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Removal of anionic azo dyes from aqueous solutions by quaternary ammonium salt-functionalized fibers with adjustable surface microenvironments

Cited by 17 publications

References 62 publications

Quaternary Ammonium Functionalized Lignosulfonate for Simultaneous Adsorption of Anionic/Cationic Dyes and Desinfection

Quaternary Ammonium Functionalized Lignosulfonate for Simultaneous Adsorption of Anionic/Cationic Dyes and Desinfection

Cationic Lignocellulose Nanofibers from Agricultural Waste as High-Performing Adsorbents for the Removal of Dissolved and Colloidal Substances

Adsorption of an Anionic Surfactant (Sodium Dodecyl Sulfate) from an Aqueous Solution by Modified Cellulose with Quaternary Ammonium

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