Sorption studies on Cr (VI) removal from aqueous solution using cellulose grafted with acrylonitrile monomer

Hajeeth, T.; Sudha, P. N.; Vijayalakshmi, K.; Gomathi, T.

doi:10.1016/j.ijbiomac.2014.02.027

Cited by 46 publications

(19 citation statements)

References 28 publications

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“…After this process, a dilute acetic acid solution was applied to neutralize the NaOH. Then, a mixed solution including 0.5 mol/L acetic acid and 0.1 mol/L sodium chlorite in 100 mL water was used to bleach the PF at 75 o C for 1 hr followed by washing with water and dried at 60 o C [10].…”

Section: Preparation Of Populus Fiber-graft-poly(amidoximated Acrylonmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Pollution of surface and underground water resources with toxic Cr (VI) has been one of the major causes for the deterioration in water quality [1][2][3][4][5][6][7][8][9][10]. Cr (VI) is used in various industries including metallurgy, leather tanning, electroplating and wood preservation [1,2,10]. There are number of treatment methods available to remove heavy metal ions and extending to remove Cr (VI) from waste water such as chemical precipitation [11,12], ion-exchange [13], membrane separation [14], electrocoagulation [15], solvent extraction [16], reverse osmosis [17] and adsorption [18,19].…”

Section: Introductionmentioning

confidence: 99%

“…These chelating resins are usually obtained through grafting polyacrylonitrile (PAN) from cellulose, and then the cyano groups converted into amidoxime groups [33][34][35][36][37]. It has been reported that KMnO 4 [33], Ce 4+ [10,34] and high-energy radiation [35,36] can be used in initiating polymerization of acrylonitrile. Ce 4+ as an initiator has advantages of short reaction time, mild reaction conditions and high rate of grafting [34].…”

Section: Introductionmentioning

confidence: 99%

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The applications of populus fiber in removal of Cr(VI) from aqueous solution

Gong

AiChao

et al. 2016

Applied Surface Science

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The surface modification of natural materials to be applied in removal of Cr (VI) from aqueous solutions has attracted much attention. A natural sorbent for Cr (VI) based on natural populus fibers (PF) is prepared by transforming the cyano groups (AN) in polyacrylonitriles (PAN) grafted from PF into amidoxime groups (AO), which has strong ability to attract and chelate heavy metal ions. The prepared sorbent is characterized by Fourier Transform Infrared Spectra (FT-IR), thermogravimetric analysis (TGA), solid-state nuclear magnetic resonance ( 13 C-NMR) and scanning electron microscope (SEM). As potassium dichromate solution (K 2 Cr 2 O 7 ) is used as a target solution for detecting adsorption capacity of the sorbent, the adsorption kinetics of the sorbent for chromiun is consistent with the pseudo-second-order kinetic model by analyzing the adsorption amount as a function of the sorbent dispersed duration in solution at pH = 2. The expected adsorption mechanism is that the Cr (VI) in anionic ions Cr 2 O 7 2and HCrO 4 are adsorbed through electrostatic attraction but when Cr (VI) is reduced to Cr (Ⅲ) by AO, the electronegative nitrogen and oxygen in AO chelate it through coordination bond. The as-prepared PF derivant with high adsorption efficiency of chromium 180.5 mg/g (3.47 mmol/g), low cost, reusability and greenly preparation process suggests that the development of natural PF as a sorbent in removal of Cr (VI) from aqueous solutions is a destined significant approach.

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Section: Preparation Of Populus Fiber-graft-poly(amidoximated Acrylonmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The applications of populus fiber in removal of Cr(VI) from aqueous solution

Gong

AiChao

et al. 2016

Applied Surface Science

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“…Blantocas et al (2017) proposed a molecular program package for this task with the objective to perpare theoretical modeling on the basis of the interaction of chitosan/TiO 2 . A competent element adsorbent from quaternary ammonium cellulose was effectively established by the quick elimination of Cr from aquatic solution (Neagu, 2009;Taha et al, 2012;Zhou et al, 2011;Hajeeth et al, 2014). The effect of HOMO-LUMO energy gaps and some electronic properties on the immobilization and heavy metal absorption process was examined (Chaban, 2016;Shtepliuk and Yakimova, 2018).…”

Section: Introductionmentioning

confidence: 99%

Electronic Properties of Cellulose Through Molecular Modeling Technique for Wastewater Treatment

Mekky¹

2020

SJKFU

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Improvement of cellulose electronic properties is one of the promising strategies used in wastewater treatment. The aim of this work is to study the properties of cellulose (Ce) enhanced by combining with chitosan (Cs) and TiO 2 nano-particles, as molecular modeling using certain naturally revised blends can help in eliminating heavy elements from the waste-water environment. TiO 2 , as water management mediators, was admitted in the chitosan/ cellulose blend. The nano-component cellulose/ TiO 2 and cellulose/chitosan/TiO 2 (Ce/TiO 2 and Ce/Cs/TiO 2) was utilized to detect the optimized geometrical structures and some electronic properties of the samples. The consequences of polymer nano-composites (PNCs) showed an expansion of the contact between the contiguous atoms when adjusting the optimized geometry, higher dipole moment, and lower ionization potential and slight HOMO-LUMO energy gaps compared to their original constituents of pure Ce. Thus, the ability of the nanocomposites mix improved its ability to remove heavy-metal pollutants from wastewater.

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Fabrication of a copolymer flocculant and application for Cr(VI) removal

You

Song

et al. 2016

Polymer Engineering & Sci

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A copolymer flocculant (CATCS) derived from starch and chitosan was fabricated and used as eco‐friendly adsorbent for removal of Cr(VI) from aqueous solution. The CATCS flocculant was characterized by scanning electron microscope, thermogravimetic analysis, and Fourier transform infrared spectroscopy. The effects of CATCS dosage, initial Cr(VI) concentration, pH, and reaction time on removal of Cr(VI) were discussed. The results showed CATCS removed Cr(VI) effectively and the adsorption isotherm agreed well with the Freundlich isotherm and R–P isotherm models. The enthalpy change (ΔH) of the process was 16.75 kJ/mol suggesting the existence of chemisorption and the reaction was endothermic. Moreover, the negative free energy change (ΔG) indicated the adsorption process was feasible and spontaneous. The positive entropy change (ΔS) showed there was an increase of disorder in the system during the adsorption process. The adsorption kinetics results showed that the adsorption could be described by the pseudo‐second‐order kinetics mechanism. The activation energy (Ea) of the adsorption reaction was 29.16 kJ/mol. POLYM. ENG. SCI., 56:1213–1220, 2016. © 2016 Society of Plastics Engineers

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Sorption studies on Cr (VI) removal from aqueous solution using cellulose grafted with acrylonitrile monomer

Cited by 46 publications

References 28 publications

The applications of populus fiber in removal of Cr(VI) from aqueous solution

The applications of populus fiber in removal of Cr(VI) from aqueous solution

Electronic Properties of Cellulose Through Molecular Modeling Technique for Wastewater Treatment

Fabrication of a copolymer flocculant and application for Cr(VI) removal

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