Novel Magnetic Chitosan Hydrogel Film, Cross-Linked with Glyoxal as an Efficient Adsorbent for Removal of Toxic Cr(VI) from Water

Mirabedini, Maryam; Kassaee, M.Z.; Poorsadeghi, Samira

doi:10.1007/s13369-016-2062-1

Cited by 39 publications

(10 citation statements)

References 54 publications

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“…Magnetic particles with surface functionalized, natural‐, synthetic‐, crosslinked‐, composite‐, fibrous‐, polymers, core shell, surface‐modified, powder‐coated, polymer hybrid fibrous materials added were employed in the heavy metals removal by batch adsorption. Several magnetic adsorbents like crosslinked magnetic chitosan hydrogel film, magnetic chitosan modified with ethylenediamine, amino functionalized magnetic polymer were reported to be an efficient reduction of Cr(VI) from its aqueous mixture.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of higher degree‐deacetylated chitosan‐coated magnetic adsorbent for the removal of chromium(VI) from its aqueous mixture

Ravi

Jabasingh

2017

J of Applied Polymer Sci

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Chitosan (90% deacetylated) coated magnetic adsorbent prepared by coprecipitation method to remove Cr(VI) from its aqueous solution. The experimental studies depicts that the predominant option for removal of Chromium by adsorption from its aqueous phase using Magnetic‐Chitosan (MC). The subsequent physical, chemical, and magnetic properties of MC were characterized by X‐ray powder diffraction, scanning electron microscopy, Fourier transform infrared spectrometer, vibrating sample magnetometer. The influence of batch process parameters such as contact time, initial concentration, pH, and coexisting anions were investigated. The Box‐Behnken experimental design in response surface methodology was performed to design the experiment optimal operating conditions. The maximum percentage reduction of Cr(VI) is 96.3 that was obtained by magnetic chitosan with the optimal operating conditions of 149.53 mg/L at pH of 5.32 at the contact time of 80 min and at the temperature of 303 K. The average diameter of the magnetic chitosan was calculated from X‐ray diffractometer analysis as 24.5 nm. The equilibrium adsorption isotherm models such as Langmuir and Freundlich and the adsorption kinetics such as pseudo first order, pseudo second order and intra‐particle diffusion kinetic model were analyzed. The experimental data's suited for the best fit with the Langmuir isotherm model and pseudo first order kinetic model. It also revealed that Cr(VI) adsorption on MC is intrinsically exothermic and spontaneous. The magnetic chitosan was also used to investigate for the removal of Cr(VI) from the real water sources such as surface, underground, and tannery wastewater. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45878.

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Section: Introductionmentioning

confidence: 99%

Preparation and characterization of higher degree‐deacetylated chitosan‐coated magnetic adsorbent for the removal of chromium(VI) from its aqueous mixture

Ravi

Jabasingh

2017

J of Applied Polymer Sci

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“…Therefore, it can be used effectively for removal chromium from synthetic aqueous solutions. Grass (Onopordom Heteracanthom) 37.3 [17] Magnetic Chitosan Hydrogel 27.3 [18] Magnetic activated carbon 51.7 [19] Walnut shell pyrolysis product 49.8 [20] Grapefruit shell 39.1 [21] Carbon / AlOOH composite 32.6 [22] Biomass waste 53.4 [23] A kind of flower (Eupatorium adenophorum) 89.2 [24] Activated carbon modified with nitric acid 16.1 [25] Coconut shell activated carbon 10.9 [26] Terminalia arjuna nuts activated carbon 28.4 [27] Peanut shell activated carbon 16.3 [28] Modified coconut commercial activated carbon 20 [29] Fe and 87% under the same conditions at pH 4, respectively.…”

Section: Resultsmentioning

confidence: 99%

Preparation And Characterization Of Novel Iron (III) HydroxidePaper Mill Sludge Composite Adsorbent For Chromium Removal

Yaraş

Arslanoğlu

2019

Sakarya University Journal of Science

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This work deals with the removal of Cr (III) and Cr (VI) from synthetic solutions via a novel composite adsorbent prepared by precipitating iron (III) hydroxide on paper mill sludge (PMS). To obtain Fe(OH)3 loaded PMS,-8+16 mesh fraction of PMS was saponified with NaOH solution, then iron (III) chloride was impregnated, hydrolyzed in NaOH solution and dried. The influences of pH, time, initial concentration and temperature on removal of Cr (III) and Cr (VI) were examined and it was determined that Cr (VI) removal occurs simultaneously with a reduction reaction. Maximum removal yields for Cr (III) and Cr (VI) occurred at approximately pH = 5 and the adsorption achieved equilibrium in 90 min. Cr (VI) adsorption ratio decreases while Cr (III) removal percentage increases with raising in temperature. Experimental results are consistent with Langmuir isotherm. Adsorption capacities of Cr (III) and Cr (VI) were calculated as 8.49, 10.14, 12.62 mg/g and 7.64, 5.39 and 4.17 mg/g for 25, 40 and 55 °C, respectively. Enthalpy changes for Cr (III) and Cr (VI) were calculated as 24.67 kJ/mol and-12.46 kJ/mol, respectively. These results demonstrated that the adsorption phenomenon of Cr (III) and Cr (VI) are endothermic and exothermic.

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“…Several physicochemical and biological approaches have been used to reduce the organic and inorganic content of tannery wastewaters, including coagulation/flocculation induced by specific chemical agents [3], electrocoagulation [4], solvent extraction [5], adsorption [6], aerobic or anaerobic biological treatment [7], incineration [8], chemical oxidation [9], membrane filtration [10][11][12], and via process integration, such as by combining coagulation with microfiltration [13] or electrodialysis [14,15]. Among the adsorptionbased methods, different adsorbents, such as clays [16,17], activated carbon derived from different biological [18] and non-biological materials [19] with distinct morphologies [20], and chitosan-based compounds [6,[21][22][23][24][25][26] have proved to allow for an efficient capture of metals from target effluents.…”

Section: Introductionmentioning

confidence: 99%

“…Chitosan is an eco-friendly and inexpensive biomaterial obtained from the partial deacetylation of the acetoamine groups of chitin. Chitosan-based flakes/beads [6], nanofibres [22], membranes [12,23], or films [24] produced by chitosan crosslinking have been prepared and tested in terms of their capacity to adsorb metal ionic species. The outstanding capacity of chitosan to adsorb heavy metal ions [22], including copper [25,26] and chromium [23], such as Cr(III), has been mainly ascribed to the ability of amine to act as chelators of these ionic species.…”

Section: Introductionmentioning

confidence: 99%

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Recovery of Cr(III) from Tannery Effluents by Diafiltration Using Chitosan Modified Membranes

Zakmout

Sadi

Велизаров

et al. 2021

Water

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The selective recovery of chromium remaining in tannery effluents after the leather tanning process is highly desirable to potentiate its reuse, simultaneously minimizing the ecotoxicity of these effluents. To the best of our knowledge, this work evaluates for the first time the ability of a chitosan-based membrane for selective recovery of chromium from a tannery wastewater by subsequent diafiltration and selective chromium desorption, envisaging their integration after tannery wastewater treatment by reverse osmosis (RO). A polyethersulfone (PES) microfiltration membrane top-coated with a chitosan layer (cs-PES MF022) was used for selective recovery of Cr(III), from concentrate streams obtained by treatment of synthetic and real tannery effluents through reverse osmosis (RO), through a diafiltration process. The diafiltration of the RO concentrates was conducted by an intermittent addition of water acidified to pH 3.6. The prepared cs-PES MF022 membranes were able to retain 97% of the total mass of Cr(III) present in the RO concentrates, from a real tannery effluent, with a selectivity of 4.2 and 5 in reference to NH4+ and Cl−, respectively, 12.9 and 14.6 in reference to K and Na, and > 45 in reference to Mg, Ca, and S. Such a high selectivity is explained by the preferential adsorption of Cr(III) onto chitosan, and by the relatively high permeability of cs-PES MF022 membranes to the other ionic species. Proof of concept studies were performed to investigate the desorption of Cr(III) at pH 2 and 5.8. A higher Cr(III) desorption degree was obtained at pH 2, leading to a final solution enriched in Cr(III), which may be re-used in tannery operations, thus improving the process economy and reducing the hazardous impact of the effluents discharged by this industry.

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Novel Magnetic Chitosan Hydrogel Film, Cross-Linked with Glyoxal as an Efficient Adsorbent for Removal of Toxic Cr(VI) from Water

Cited by 39 publications

References 54 publications

Preparation and characterization of higher degree‐deacetylated chitosan‐coated magnetic adsorbent for the removal of chromium(VI) from its aqueous mixture

Preparation and characterization of higher degree‐deacetylated chitosan‐coated magnetic adsorbent for the removal of chromium(VI) from its aqueous mixture

Preparation And Characterization Of Novel Iron (III) HydroxidePaper Mill Sludge Composite Adsorbent For Chromium Removal

Recovery of Cr(III) from Tannery Effluents by Diafiltration Using Chitosan Modified Membranes

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