A comparative study on sorption of arsenate ions from water by crosslinked chitosan and crosslinked chitosan/MMT nanocomposite

Gogoi, P. K.; Thakur, Ashim Jyoti; Devi, Rajlakshmi; Das, Bhanita; Maji, Tarun K.

doi:10.1016/j.jece.2016.09.027

Cited by 36 publications

(11 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The strong interaction of clay with the functional group of Ch was considered as a reason for uniform particle distribution. The homogeneous morphology of obtained composite membranes may be attributed to the hydrophilic character of clay which facilities the miscibility of MMT or C30B with Ch in solution [64,66].…”

Section: Resultsmentioning

confidence: 99%

Development and Characterization of Polyamide-Supported Chitosan Nanocomposite Membranes for Hydrophilic Pervaporation

et al. 2018

View full text Add to dashboard Cite

An experimental protocol of preparation of homogeneous and nanocomposite chitosan (Ch) based membranes supported on polyamide-6 (PA6) films was developed and described in detail. Montmorillonite (MMT) and Cloisite 30B (C30B) nanoclays were used as nanofillers to improve mechanical properties of chitosan films. The surface, mechanical, and transport properties of PA6 supported Ch, Ch/MMT and Ch/C30B membranes were studied and compared with a pristine, non-supported chitosan membrane. Implementation of advanced analytical techniques e.g., SEM reveal the clays nanoparticles are well dispersed in the chitosan matrix. According to AFM images, composite chitosan/nanoclay membranes possess higher roughness compared with unfilled ones. On the other hand, an incorporation of clay particles insignificantly changed the mechanical and thermal properties of the membranes. It was also found that all membranes are hydrophilic and water is preferentially removed from EtOH/H2O and iPrOH/H2O mixtures by pervaporation. Supporting of chitosan and chitosan/nanoclay thin films onto PA6 porous substrate enhanced permeate flux and pervaporation separation index, in comparison to the pristine Ch membrane. Concerning separation factor (β), the highest value equal to 4500 has been found for a chitosan composite membrane containing Cloisite 30B contacting 85/15 wt % iPrOH/H2O mixture. The mentioned membrane was characterized by the normalized flux of 0.5 μm kg m−2 h−1. Based on the established data, it was possible to conclude that chitosan membranes are meaningful material in dehydration of azeotropic mixtures. Nevertheless, to boost up the membrane efficiency, the further modification process is required.

show abstract

Section: Resultsmentioning

confidence: 99%

Development and Characterization of Polyamide-Supported Chitosan Nanocomposite Membranes for Hydrophilic Pervaporation

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Moreover, it is applicable in household module and industrial plants and has the capacity for adsorbent regeneration [27,28]. Extensive literature review shows several materials have been utilized in arsenic and radioactive elements removal including magnetic metal-organic framework nanocomposite [29], crosslinked chitosan/MMT [30], chitosan-coated bentonite [31], clinoptilolite-rich tuff [32], activated bauxite [33], hematite [33], kaolinite [34], montmorillonite [34], granular ferric oxide [35], UltraCarb [36], nZVI-zeolite [37], F400 [38], polymer-clay nanocomposite ion exchange resin [39], and iron-titanium oxide [40]. Spent adsorbents often undergo a regeneration process or may require special handling before disposal.…”

Section: Introductionmentioning

confidence: 99%

Treatment of Contaminated Groundwater via Arsenate Removal Using Chitosan-Coated Bentonite

Yee

Arida²,

Futalan

et al. 2019

Molecules

View full text Add to dashboard Cite

In the present research, treatment of contaminated groundwater via adsorption of As(V) with an initial concentration of 50.99 µg/L using chitosan-coated bentonite (CCB) was investigated. The effect of adsorbent mass (0.001 to 2.0 g), temperature (298 to 328 K), and contact time (1 to 180 min) on the removal efficiency was examined. Adsorption data was evaluated using isotherm models such as Langmuir, Freundlich, and Dubinin-Radushkevich. Isotherm study showed that the Langmuir (R2 > 0.9899; χ2 ≤ 0.91; RMSE ≤ 4.87) model best correlates with the experimental data. Kinetics studies revealed that pseudo-second order equation adequately describes the experimental data (R2 ≥ 0.9951; χ2 ≤ 0.8.33; RMSE ≤ 4.31) where equilibrium was attained after 60 min. Thermodynamics study shows that the As(V) adsorption is non-spontaneous (ΔG0 ≥ 0) and endothermic (ΔH0 = 8.31 J/mol) that would result in an increase in randomness (ΔS0 = 29.10 kJ/mol•K) within the CCB-solution interface. FT-IR analysis reveals that hydroxyl and amino groups are involved in the adsorption of As(V) from groundwater. Results of the present research serve as a tool to determine whether CCB is an environmentally safe and cost effective material that could be utilized in a permeable reactive barrier system for the remediation of As(V) from contaminated groundwater.

show abstract

“…The dark lines pointed out the well delaminated nano-montmorillonite layers which were stabilized within the crosslinked polymer matrix, whereas the bright zone reflected the intercalated Chs matrix. Sizes were less than 100 nm, so it could be assumed that both prepared composites were nanocomposite materials [38][39][40].…”

Section: Ft-irmentioning

confidence: 99%

Adsorption of the anionic dye (Diamond Fast Brown KE) from textile wastewater onto chitosan/montmorillonite nanocomposites

et al. 2019

View full text Add to dashboard Cite

A NOVEL nanocomposite chitosan/montmorillonite has been prepared by using two different weight ratios of nano-montmorillonite (Chs1 and Chs2). The structure of the prepared adsorbents has been characterized by Fourier transform infrared (FT-IR) spectroscopy, and transmission electron microscopy (TEM). The adsorption kinetics and isotherm behaviors of Diamond Fast Brown KE (DFB) dye molecules onto prepared chitosan nanocomposites had been studied and compared using pseudo-first, pseudo-second, and Langmuir, Freundlich, Dubinin _ Radushkevich models, respectively. The maximum adsorption capacities of DFB according to Langmuir isotherm model were 403.23 and 375.94 mg g-1 for Chs1 and Chs2, respectively. Moreover, our results indicate that the adsorption mechanism can be explained by the formation of the hydrogen bond. Based on the obtained results, Chs1 and Chs2 can be successfully applied for DFB dye removal from textile wastewater.

show abstract

A comparative study on sorption of arsenate ions from water by crosslinked chitosan and crosslinked chitosan/MMT nanocomposite

Cited by 36 publications

References 32 publications

Development and Characterization of Polyamide-Supported Chitosan Nanocomposite Membranes for Hydrophilic Pervaporation

Development and Characterization of Polyamide-Supported Chitosan Nanocomposite Membranes for Hydrophilic Pervaporation

Treatment of Contaminated Groundwater via Arsenate Removal Using Chitosan-Coated Bentonite

Adsorption of the anionic dye (Diamond Fast Brown KE) from textile wastewater onto chitosan/montmorillonite nanocomposites

Contact Info

Product

Resources

About