Green method to synthesize magnetic zeolite/chitosan composites and adsorption of hexavalent chromium from aqueous solutions

Liu, Xiaoqi; Zhang, Yanyun; Liu, Yan; Zhang, Ting‐an

doi:10.1016/j.ijbiomac.2021.11.121

Cited by 27 publications

(3 citation statements)

References 34 publications

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“…For the case of Cr(III) and Cr(VI) adsorption, CH-MS outperformed different activated carbons, magnetic zeolite/chitosan composites, multiwalled carbon nanotube, and natural clinoptilolite [137, 150–152]. On the other hand, the adsorption properties of CH-N were higher than those reported for magnetic zeolite/chitosan composites and porous Fe 3 O 4 hollow microspheres/graphene oxide composite [153, 154]. However, its removal performance was lower than the reported for functionalized multiwalled carbon nanotube with H 2 SO 4 /HNO 3 solution and ionic liquid impregnated exfoliated graphene oxide [152, 155].…”

Section: Resultsmentioning

confidence: 99%

Adsorption of Arsenic, Lead, Cadmium, and Chromium Ions from Aqueous Solution Using a Protonated Chabazite: Preparation, Characterization, and Removal Mechanism

Pinedo-Torres

Bonilla-Petriciolet

García-Arreola

et al. 2023

Adsorption Science & Technology

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The adsorption of As(V), Pb(II), Cd(II), and Cr(III) ions from aqueous solutions on natural and modified chabazite was studied. The functionalization of chabazite was performed via a protonation and calcination with the aim of generating Lewis acid sites to improve its anion exchange properties. The surface and physicochemical properties of both adsorbents were studied and compared. The adsorption isotherms of tested heavy metal ions were quantified and modeled to identify the best isotherm equation. Steric parameters for the adsorption of these ions were also calculated with a monolayer statistical physics model. Natural chabazite showed the maximum adsorption capacity for Pb(II), while the modified zeolite improved its As(V) properties in 79%. These results showed that the modified zeolite was able to remove both cations and anions from aqueous solution. The application of this functionalized chabazite can be extended for the removal of other anionic pollutants from water, thus opening the possibility of preparing new adsorbents with tailored properties for water treatment.

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Section: Resultsmentioning

confidence: 99%

Adsorption of Arsenic, Lead, Cadmium, and Chromium Ions from Aqueous Solution Using a Protonated Chabazite: Preparation, Characterization, and Removal Mechanism

Pinedo-Torres

Bonilla-Petriciolet

García-Arreola

et al. 2023

Adsorption Science & Technology

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“…Analyzing the equilibrium data by kinetic and isotherm models demonstrated that Cr( vi ) adsorption fitted the Langmuir adsorption isotherm and pseudo second order kinetics, implying the domination of the chemical interactions in the adsorption process. 26 In this context, Eltaweil and his co-authors developed a new CTS-based adsorbent (NiFe 2 O 4 @SEH-CTS-SB) to remove the detrimental Cr( vi ) from an aqueous medium. The calculated q max of Cr( vi ) onto NiFe 2 O 4 @SEH-CTS-SB under the Langmuir isotherm was 373.61 mg g −1 .…”

Section: Introductionmentioning

confidence: 99%

Engineering a sustainable cadmium sulfide/polyethyleneimine-functionalized biochar/chitosan composite for effective chromium adsorption: optimization, co-interfering anions, and mechanisms

Eltaweil,

Al Harby,

El Batouti

et al. 2024

RSC Adv.

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“…Among the many methods for Cr(VI) removal from water, including membrane filtration [8], coagulation [9], solvent extraction [10], chemical precipitation [11], catalytic and photocatalytic reduction [12][13][14], etc., adsorption is considered one of the most attractive due to its simplicity, abundance of potential adsorbent precursors and possibility of adsorbent recyclability [15]. There are multiple classes of materials that have been shown to be effective adsorbents of Cr(VI), such as carbon derivatives from various sources [16][17][18], clays [19][20][21], zeolites [22][23][24] and conducting polymers, such as polyaniline and polypyrrole (PPy) [25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Magnetic Polypyrrole-Gelatin-Barium Ferrite Cryogel as an Adsorbent for Chromium (VI) Removal

Milakin,

Taboubi,

Hromádková

et al. 2023

Gels

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Polypyrrole-gelatin aerogels, containing magnetic barium ferrite (BaFe) particles, (PPy-G-BaFe) were synthesized by oxidative cryopolymerization and used as adsorbents for the removal of Cr(VI) from aqueous media. The removal was performed at pH 4, which was shown to be the optimal value, due to HCrO4− being the dominant species in these conditions and its more favorable adsorption and reduction compared to CrO42−, present at pH > 4. It was found that the presence of magnetic BaFe particles had no effect on the adsorption performance of PPy aerogels in terms of capacity and kinetics, which was attributed to its relatively low content in the composite. After the adsorption, the presence of chromium in the composites was confirmed by EDX and its electrostatic interaction with the adsorbent was pointed at by vibrational spectroscopy, corresponding to the accepted adsorption mechanism. The adsorption kinetics followed the pseudo-second-order model pointing at chemisorption being the rate-limiting step. The adsorption isotherm data was best fitting with the Temkin model. The maximum adsorption capacity, calculated using the Langmuir model, was 255.8 mg g−1 (the maximum experimental value was 161.6 mg g−1). Additionally, the possibility of Cr(VI) adsorption in the presence of Cl−, Br−, NO3− and SO42− as interfering ions was shown.

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Green method to synthesize magnetic zeolite/chitosan composites and adsorption of hexavalent chromium from aqueous solutions

Cited by 27 publications

References 34 publications

Adsorption of Arsenic, Lead, Cadmium, and Chromium Ions from Aqueous Solution Using a Protonated Chabazite: Preparation, Characterization, and Removal Mechanism

Adsorption of Arsenic, Lead, Cadmium, and Chromium Ions from Aqueous Solution Using a Protonated Chabazite: Preparation, Characterization, and Removal Mechanism

Engineering a sustainable cadmium sulfide/polyethyleneimine-functionalized biochar/chitosan composite for effective chromium adsorption: optimization, co-interfering anions, and mechanisms

Magnetic Polypyrrole-Gelatin-Barium Ferrite Cryogel as an Adsorbent for Chromium (VI) Removal

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