Adsorptive potential of dispersible chitosan coated iron-oxide nanocomposites toward the elimination of arsenic from aqueous solution

Neeraj, Gerard; Krishnan, Raghunandan Santhana; Kumar, Ponnusamy Senthil; Cabana, Hubert; Vaidyanathan, Vinoth Kumar

doi:10.1016/j.psep.2016.09.006

Cited by 66 publications

(14 citation statements)

References 53 publications

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“…A similar trend was also reported for the adsorption of As(V) on nZVI-supported by activated carbon [38]. The decrease in As(III) adsorption was attributed to less availability of the active sites for a certain amount of dose [39]. The active sites available for adsorption were substantial at low As(III) concentrations.…”

Section: Effect Of Initial Concentration Of As(iii) On Its Removalsupporting

confidence: 82%

Treatment of As(III)-Laden Contaminated Water Using Iron-Coated Carbon Fiber

Kurniawan

Gui³

et al. 2022

Materials

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This work presents the fabrication, characterization, and application of iron-coated carbon fiber (Fe@CF), synthesized in a facile in situ iron reduction, for As(III) removal from an aqueous solution. The physico-chemical properties of the composite were characterized using Brunauer–Emmett–Teller (BET) surface area, scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier-transform infrared (FTIR) spectroscopy. Adsorption studies were evaluated in batch experiments with respect to reaction time, the dose of adsorbent, As(III) initial concentration, pH, and co-existing ions. The results showed that the BET surface area and pore volume of Fe@CF slightly decreased after Fe coating, while its pore size remained, while the SEM and XRD analyses demonstrated that the Fe was successfully anchored on the CF. A maximum As(III) adsorption of 95% was achieved with an initial As concentration of 1.5 mg/L at optimum conditions (30 min of reaction time, 1 g/L of dose, 1 mg/L of As(III) concentration, and pH 3.5). Since the treated effluents could not meet the strict discharge standard of ≤10 μg/L set by the World Health Organization (WHO), a longer reaction time is required to complete the removal of remaining As(III) in the wastewater effluents. As compared to the other adsorbents reported previously, the Fe@CF composite has the highest As(III) removal. Overall, the findings suggested that the use of Fe@CF as an adsorbent is promising for effective remediation in the aquatic environment.

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Section: Effect Of Initial Concentration Of As(iii) On Its Removalsupporting

confidence: 82%

Treatment of As(III)-Laden Contaminated Water Using Iron-Coated Carbon Fiber

Kurniawan

Gui³

et al. 2022

Materials

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“…Root mean square error ( RMSE ) and chi-square ( χ 2 ) are represented as Equations (1) and (2): RMSE=(1Ntrue∑i=1N(qtheo,i−qexp,i)2), χ2=true∑((qexp−qtheo)2qtheo) where q theo refers to the adsorption capacity generated by the model (mg/g), q exp refers to the experimental adsorption capacity (mg/g), N is the total number of experimental data [56,57]. A RMSE and χ 2 value close to zero suggest that the model utilized is a better fit and more reliable in the prediction of theoretical values wherein a lower bias exists between the predicted and experimental values [58,59].…”

Section: Methodsmentioning

confidence: 99%

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

Yee

Arida²,

Futalan

et al. 2019

Molecules

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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.

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“…While there are many studies concerning the use of chitosan for hybrid sorbents’ preparation (Miller and Zimmerman 2010; Seyed Dorraji et al 2014; Wang et al 2014; Qi et al 2015; Gerard et al 2016; He et al 2016; Martínez-Cabanas et al 2016; Su et al 2016; Dhoble et al 2017; López-García et al 2017), there is a lack of a detailed and thorough survey on the influence of selected process parameters on adsorptive and physical properties of the obtained material. Aside from the native properties of the used inorganic deposit, the stability and adsorptive properties of the formed hybrid polymer result from the composition and the sorbent’s structure, its swelling capacity in aqueous solutions, and cross-linking degree of the polymeric chains.…”

Section: Introductionmentioning

confidence: 99%

Optimization of hybrid polymer preparation by ex situ embedding of waste Fe/Mn oxides into chitosan matrix as an effective As(III) and As(V) sorbent

Ociński

2019

Environ Sci Pollut Res

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A hybrid polymer for deep removal of arsenic from aqueous solutions was obtained by loading of waste Fe/Mn oxides into a chitosan matrix. The process was optimized by studying the influence of selected individual factors and their reciprocal combinations on the adsorptive and physical properties of the product. The influence of chitosan solution concentration, inorganic load amount, the ratio of Fe/Mn oxides to chitosan, and polymer cross-linking degree on kinetics of As(III) and As(V) adsorption was examined. The optimal values of the parameters were chitosan polymer concentration 1.5% w / w , inorganic load to chitosan ratio 1.67, and glutaraldehyde to chitosan amine groups molar ratio 3:1. The selected products were evaluated in terms of their morphology (scanning electron microscopy (SEM) with EDS analysis), porosity (N 2 and CO 2 adsorption isotherms), surface properties (Fourier-transform infrared spectroscopy (FTIR), isoelectric point determination) and durability in an acidic environment. The proposed process makes it possible to obtain a product combining beneficial adsorptive properties toward arsenic with the physical form and durability essential in fixed-bed adsorption systems. Electronic supplementary material The online version of this article (10.1007/s11356-019-05856-x) contains supplementary material, which is available to authorized users.

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Adsorptive potential of dispersible chitosan coated iron-oxide nanocomposites toward the elimination of arsenic from aqueous solution

Cited by 66 publications

References 53 publications

Treatment of As(III)-Laden Contaminated Water Using Iron-Coated Carbon Fiber

Treatment of As(III)-Laden Contaminated Water Using Iron-Coated Carbon Fiber

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

Optimization of hybrid polymer preparation by ex situ embedding of waste Fe/Mn oxides into chitosan matrix as an effective As(III) and As(V) sorbent

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