Fabrication of lightweight and reusable salicylaldehyde functionalized chitosan as adsorbent for dye removal and its mechanism

Parshi, Nira; Pan, Dipika; Dhavle, Vishal; Jana, Biswajit; Maity, Santu; Ganguly, Jhuma

doi:10.1016/j.ijbiomac.2019.09.025

Cited by 59 publications

(9 citation statements)

References 31 publications

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“…Where qm corresponds to the maximum adsorption capacity and KL refers to the Langmuir The results of the adjustments showed that the Langmuir model presented better correlation coefficients when compared to the Freundlich model. According to the Langmuir model, maximum adsorption occurs in a monolayer of solute molecules on the surface of the adsorbent, without any lateral interaction between the adsorbed molecules [52,53,58]. That is, the adsorbent has a limited number of positions available on the surface and that the molecules can be adsorbed until the available surface sites are vacated [49,51].…”

Section: Balance Study and Thermodynamic Parametersmentioning

confidence: 99%

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Removal of Remazol Black B dye using bacterial cellulose as an adsorbent

et al. 2021

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Effluents from textile processes, when discarded of inappropriately, have been shown to be a major environmental concern. In this way, different methods can be used, among them adsorption is an economical and efficient technique in the removal of dyes. Therefore, we propose to analyze the adsorptive capacity of bacterial cellulose (CB) against effluents containing the dye Remazol Black B (RBB). CB was produced by the bacterium Gluconacetobacter hansenii and characterized by the techniques of FTIR, DRX, TGA / DTG and pH (PCZ). The RBB removal tests were initially performed at different pHs. From the best experimental condition, new tests were performed at temperatures of 30, 40, 60 and 100 ± 2 °C, 150 rpm, pH 3.5, using 0.5 g of adsorbent in the concentrations of dye from 25 to 65 mg•L -1 . The kinetic study showed that the system balance was achieved in 80 minutes. The experimental data were better described by the pseudosecond order model. The equilibrium results showed that the experimental data fit the Langmuir model (qmax 17.513 mg•g -1 ). The thermodynamic parameters of adsorption showed that the process is exothermic, not spontaneous and also presented low system randomness. The activation energy (Ea) was 23.8 kJ•mol -1 characterizing physical adsorption. The residual water was not toxic to animal or microbial cells. Bacterial cellulose proved to be a good low-cost adsorbent, easy to acquire and which can be used in the adsorption process.

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Section: Balance Study and Thermodynamic Parametersmentioning

confidence: 99%

“…The models of pseudo-first order (applied in times above the initial 20-30 minutes of the adsorption process) and intraparticle diffusion (mechanism as a limiting step) did not fit satisfactorily with the experimental data because they have a low correlation coefficient [52,53].…”

mentioning

confidence: 93%

Removal of Remazol Black B dye using bacterial cellulose as an adsorbent

et al. 2021

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“…Among these methods, adsorption is regarded to be the most effective and reliable method due to its accessibility and low cost [16][17][18]. Porous materials are particularly suitable sorbents for the removal of dyes on account of their high speci c surface areas (that is, large numbers of active sites for the adsorption of dye molecules) and their surface functional groups and internal structures [19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Facile Preparation of Hierarchically Porous Aromatic-cyclodextrin Polymers and Their Application for the Selective Adsorption of Cationic Dyes

Duan

Wang

et al. 2021

Preprint

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Porous β-cyclodextrin-containing materials have significant potential as adsorbents for the removal of pollutants from water. However, preparing these porous polymers in the aqueous phase is challenging. In this study, a kind of novel porous aromatic-cyclodextrin polymers (P-aro-CDPs) was designed and synthesized in aqueous solution under mild conditions by exploiting covalence-crosslinking reaction. P-aro-CDPs were characterized using a variety of methods, which revealed that P-aro-CDPs have a hierarchical porous structure, a highly negatively charged surface, and rich in hydroxyl groups. The prepared P-aro-CDPs showed excellent removal efficiency for methylene blue, with a maximum adsorption capacity of 194.17 mg g-1. The adsorption data are well fitted to the pseudo-second-order kinetic model and the Langmuir isotherm. The as-synthesized P-aro-CDPs material exhibited superior adsorption selection toward cationic dyes than anionic dyes whether in single or multicomponent systems. Further, the P-aro-CDPs adsorbent are reusable, and good performance over six adsorption–desorption cycles was demonstrated. Due to its off-the-beaten-path synthesis, low cost, excellent removal efficiency, and recyclability, P-aro-CDPs have great potential for use as an adsorbent in water-treatment applications.

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“…Wide range organic and inorganic adsorbent has been used to reduce dyes from an aqueous solution such as chitin, chitosan 9 , cellulose 10 , bentonite 11 , kaolin 12 , clay 13 , carbon nanotube 14 , zeolite 15 , and also layered double hydroxide (LDH) [16][17][18] . LDH is inorganic layer material with the general formula [M 2+ /M 3+ (OH) ]x + [A n− ] •mH2O where M 2+/ M 3+ is divalent and trivalent metal ions, from stacking brucite-like layers metal oxide containing a positive charge due to partial substitution of divalent metal cation by trivalent metal cation 19 .…”

Section: Introductionmentioning

confidence: 99%

Citrate-Zn/Al Layered Double Hydroxide as Adsorbent of Congo Red from Aqueous Solution

Hidayati¹,

Palapa²,

Rahayu³

et al. 2020

Mediterr.J.Chem.,

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Layered double hydroxide (LDH) of Zn/Al and citrate-Zn/Al was prepared and used as an adsorbent of Congo red from aqueous solution. LDH was characterized by X-ray, FTIR, and BET analysis. Adsorption of Congo red was studied through kinetic, isotherm, and thermodynamic analyses. Zn/Al LDH has diffraction at 10.29o (003) with interlayer distance 8.59 Å and citrate-Zn/Al LDHs have anomalous diffraction at 7.57o (003) with interlayer distance 11.68 Å. The surface area of citrate-Zn/Al (40.50 m2 g-1) has higher than pristine LDH (1.97 m2 g-1). Adsorption of Congo red was conducted at pH 6 for Zn/Al LDH and at pH 8 for citrate-Zn/Al LDH. Adsorption of Congo red on both LDHs follows the pseudo-second-order kinetic model. The isotherm parameter follows the Freundlich isotherm model with maximum adsorption capacity 166.67 mg g-1 for Zn/Al and 249.99 mg g-1 for citrate-Zn/Al LDH. Adsorption of Congo red on both LDHs was classified as physical adsorption with energy 4.085-4.148 kJ mol-1.

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Fabrication of lightweight and reusable salicylaldehyde functionalized chitosan as adsorbent for dye removal and its mechanism

Cited by 59 publications

References 31 publications

Removal of Remazol Black B dye using bacterial cellulose as an adsorbent

Removal of Remazol Black B dye using bacterial cellulose as an adsorbent

Facile Preparation of Hierarchically Porous Aromatic-cyclodextrin Polymers and Their Application for the Selective Adsorption of Cationic Dyes

Citrate-Zn/Al Layered Double Hydroxide as Adsorbent of Congo Red from Aqueous Solution

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