Synthesis of ethylenediamine modified chitosan microspheres for removal of divalent and hexavalent ions

Chethan, P.D.; Vishalakshi, B.

doi:10.1016/j.ijbiomac.2015.01.032

Cited by 41 publications

(8 citation statements)

References 41 publications

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“… Adsorbents Q max (mg/g) Time (min) Refs. Chitosan 35.6 120 13 Titanium cross-linked chitosan composite 171 420 15 Zirconium cross-linked chitosan 175 300 16 Chitosan–Fe(III) complex 173.1 10 17 Ethylenediamine cross-linked magnetic 51.8 6–10 18 Chitosan resin Ethylenediamine modified chitosan 60.9 120 19 n -butylacrylate grafted chitosan 17.15 60 20 CTS/montmorillonite-Fe 3 O 4 35.71–58.82 90 22 Magnetic cyclodextrin-chitosan/graphene oxide 67.66 300 23 Chitosan-coated MnFe 2 O 4 nanoparticles 35.32 360 24 Cross-linked magnetic chitosan beads 69.4 60 25 Magnetic chitosan nanoparticles 55.8 100 26 Magnetic chitosan–GO nanocomposite 101.6 120 28 CTS-iron(III) hydrogel 144.9 30 29 Modified magnetic chitosan chelating resin 58.5 120 31 …”

Section: Resultsmentioning

confidence: 99%

“…Recently, to enhance its adsorbing ability for Cr(VI), various methods for the modification of CTS have been demonstrated. These include titanium cross-linked chitosan composite 15 , zirconium cross-linked chitosan 16 , chitosan-Fe(III) complex 17 , ethylenediamine modified chitosan microsphere 18 , 19 , n -butylacrylate grafted chitosan 20 , and so on. What’s more, the magnetic nanoparticles (MNPs) have continued to draw considerable interests for their large surface areas and simple magnetic separation via a magnet.…”

Section: Introductionmentioning

confidence: 99%

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One-step synthesis of 1,6-hexanediamine modified magnetic chitosan microspheres for fast and efficient removal of toxic hexavalent chromium

Yue

Chen

et al. 2018

Sci Rep

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Here, we reported a novel one-step hydrothermal route for the facile synthesis of 1,6-hexanediamine functionalized magnetic chitosan microspheres (AF-MCTS), which were characterized by TEM, FT-IR and XPS to look into its morphology, surface functional groups, and adsorption mechanism of Cr(VI) from the aqueous solution. Cr(VI) adsorption on AF-MCTS as a function of contact time, Cr(VI) concentration, pH, and ionic strength was investigated. The adsorption process follows the Langmuir isotherm model and pseudo-second-order kinetic model. The AF-MCTS exhibited high performance for Cr(VI) removal with very fast adsorption rate (reaching equilibrium within 5 min) and high adsorption capacity (208.33 mg/g), which was 1.1 to 12 times that of other chitosan-based adsorbents. Cr(VI) adsorption onto AF-MCTS was an endothermic and spontaneous process. The recovery and reuse of AF-MCTS was demonstrated 11 times without obvious decrease in adsorption capacity. Mechanism study suggested that –OH rather than –NH2 groups in AF-MCTS were the electron donors for reducing Cr(VI) to Cr3+. Consumption or addition of H+ could trigger the reversible supramolecular coordination between Cr3+ and chitosan. Given the easy preparation, low cost, and remarkable performance, AF-MCTS composite is expected to show promising potential for the practical application in removing toxic Cr(VI) from aqueous media.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

One-step synthesis of 1,6-hexanediamine modified magnetic chitosan microspheres for fast and efficient removal of toxic hexavalent chromium

Yue

Chen

et al. 2018

Sci Rep

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“…pH is an important factor because, as is well known, in acid medium, hydronium ions could compete with metal ions for binding sites in the adsorption process, reducing availability of active sites. Also, metal ions will precipitate in basic medium as metal hydroxides, thus, at conditions above pH = 7, concentration of metal ions dissolved is lower due to precipitation and not to adsorption, as shown in Fig. .…”

Section: Resultsmentioning

confidence: 99%

Novel chitosan/polyurethane/anatase titania porous hybrid composite for removal of metal ions waste

Argüello

Hernández-Martínez

Molina

et al. 2016

J. Chem. Technol. Biotechnol.

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BACKGROUND: For almost three decades, heavy metal pollution has been studied and several treatment techniques have been proposed. Nevertheless, this contamination in wastewater is still a severe problem. In our study, Cd (II), Pb (II) and Al (III) metal ions removal was evaluated, using a chitosan-TiO 2 -polyurethane based composite. Composite synthesis variations in composition and temperature were studied; morphology characterization was conducted by SEM, EDS-STEM and X-ray micro-CT. Wastewater samples in different pH solutions, and in static and dynamic systems were analyzed by ICP-MS. Also, the photo-degradation of azo dyes in these systems was studied by UV-vis spectrophotometry. A dynamic removal system was built as possible water treatment plant prototype.

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“…The adsorbed amounts of Cr(VI) were calculated by subtracting the equilibrium concentrations (C e , mg L À1 ) from the initial concentrations (C 0 , mg L À1 ) and the adsorption capacities (q e , mg g À1 ) were calculated by Equation (1). Removal efficiency (R, %) of Cr(VI) ions by the MZFA/CS composite is considered in percentage as Equation (2).…”

Section: Adsorption Experimentsmentioning

confidence: 99%

“…[ 1 ] Due to its bioaccumulation, non‐biodegradability, and long‐term existence in nature compared to organic pollutants, it is considered the most dangerous pollutant in water bodies. [ 2 ] Currently, rapid industrialization (such as electroplating, leather tanning, dye, photography, iron, and steel industries) over the years led to an increase and accumulation of hexavalent chromium (Cr(VI)) in the environment. [ 3 ] Cr(VI) is well known and is perceived to be extremely toxic to living organisms.…”

Section: Introductionmentioning

confidence: 99%

Preparation of magnetic zeolite/chitosan composite using silane as modifier for adsorption of Cr(VI) from aqueous solutions

Liu

Zhang

2021

Vinyl Additive Technology

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This study aimed to prepare an efficient, cost‐effective, and separable magnetic zeolite/chitosan composite (MZFA/CS) adsorbent from solid waste to deal with the water pollution of Cr(VI). The MZFA/CS was characterized by X‐ray fluorescence (XRF), Fourier transform infrared (FTIR) spectroscopy, X‐ray diffraction (XRD), and vibrating sample magnetometer (VSM) techniques. Then, the effect of pH, temperature, initial concentration of Cr(VI) ions, and contact time was considered in the study. For a sorbent dose of 0.1 g in 50 mL of a Cr(VI) solution, at a contact time of 30 min, temperature of 30°C, and a pH of 3, an adsorption capacity (qe) of 16.96 mg g−1 was achieved. Adsorption kinetics and isotherm data obtained for all adsorption systems were well‐fitted by pseudo‐second‐order and Langmuir models, respectively. The thermodynamic study suggested that the adsorption process is spontaneous and endothermic in nature. In summary, the adsorbent with better separability (Ms = 16.83 emu g−1) and adsorbability was successfully fabricated.

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Synthesis of ethylenediamine modified chitosan microspheres for removal of divalent and hexavalent ions

Cited by 41 publications

References 41 publications

One-step synthesis of 1,6-hexanediamine modified magnetic chitosan microspheres for fast and efficient removal of toxic hexavalent chromium

One-step synthesis of 1,6-hexanediamine modified magnetic chitosan microspheres for fast and efficient removal of toxic hexavalent chromium

Novel chitosan/polyurethane/anatase titania porous hybrid composite for removal of metal ions waste

Preparation of magnetic zeolite/chitosan composite using silane as modifier for adsorption of Cr(VI) from aqueous solutions

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