Adsorption of Toxic Metals on Modified Polyacrylonitrile Nanofibres: A Review

Bode-Aluko, Chris; Pereao, Omoniyi; Ndayambaje, Guillaume; Petrik, Leslie

doi:10.1007/s11270-016-3222-3

Cited by 63 publications

(28 citation statements)

References 47 publications

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“…In addition, cadmium is not biodegradable, and exposure to this pollutant can lead to various diseases and disorders [1]. The method commonly used to solve these serious environmental problems is adsorption, which has been proven to be one of the most efficient and cost-effective methods for water treatment applications [2]. However, the real problem in this area is the choice of selecting new adsorbents.…”

Section: Introductionmentioning

confidence: 99%

1,2,3,4-Tetrahydropyrimidine Derivative for Selective and Fast Uptake of Cadmium Ions from Aqueous Solution

M’hamed

Khezami

2019

Environments

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The aim of this work was to evaluate the performance of a 1,2,3,4-tetrahydropyrimidine derivative as a powerful heterocyclic compound for the elimination of Cd(II) ions from aqueous solutions. The tetrahydropyrimidine derivative was prepared during 30 min of milling by planetary ball mill with a ball-to-powder mass ratio of 8:1 and a rotation speed of 750 rpm. Nuclear magnetic resonance (NMR) and infrared (IR) were used to identify the obtained tetrahydropyrimidine derivatives. Furthermore, batches of experiments were carried out to establish the adsorption equilibrium, kinetics, and thermodynamic variables of the tetrahydropyrimidine derivatives for toxic heavy Cd(II) ions. The adsorption data were simulated by applying the Langmuir manner, the Freundlich equation, the pseudo-first-order and pseudo-second-order equations. The adsorption procedure was discovered to be very influenced by PH. The removal of heavy metal ions reached a maximum value quickly within 6 min and the adsorption data better adjusted the Langmuir isotherm than that of the Freundlich isotherm. The maximum Cd(II) ions adsorption capacity was approximated to be 151.16 mg g−1 at 328 K and a pH of 6 to 7. It was found that the adsorption kinetics of Cd(II) ions obeyed pseudo-second-order adsorption kinetics. The examination of the thermodynamic variables of tetrahydropyrimidine derivative showed a spontaneous endothermic adsorption procedure. Otherwise, positive entropy values put forward a rise in the randomness at the solid-solution interface when heavy metal ions are adsorbed.

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Section: Introductionmentioning

confidence: 99%

1,2,3,4-Tetrahydropyrimidine Derivative for Selective and Fast Uptake of Cadmium Ions from Aqueous Solution

M’hamed

Khezami

2019

Environments

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“…The adsorption efficiency of an adsorbent is mainly depending on its surface functional groups. Nevertheless, the material uptake capacity (chemisorption) is not the important point, but also its ability to desorb subsequently metals (physisorption) . Various adsorbents such as activated carbon, waste biomass, industrial waste, bio‐sorbents, chitosan, and chelating materials, have been used to remove Cr (VI) from aqueous solutions .…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, Cr(VI) is listed in group A of toxic pollutants in wastewater by the Environmental Protection Agency (EPA) [4]. Cr (VI) species may exist in wastewater as chromates (CrO 4 metals (physisorption) [12]. Various adsorbents such as activated carbon, waste biomass, industrial waste, bio-sorbents, chitosan, and chelating materials, have been used to remove Cr (VI) from aqueous solutions [13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of amidoximated polyacrylonitrile fibers and its use as adsorbent for Cr (VI) ions removal from aqueous solutions

Bouchoum

Benmoussa

Jada

et al. 2019

Env Prog and Sustain Energy

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Functionalized fibers, especially polyacrylonitrile fibers (PANF), have attracted wide interest as an effective and economical material for environment and water protection. In this study, polyacrylonitrile fibers modified with hydroxylamine hydrochloride were used as an adsorbent to remove hexavalent chromium ions from aqueous solutions. The novelty of the present study compared to the literature is the functionalization of polyacrylonitrile fibers surface by optimizing cost and energy while achieving a yield fast removal rate and high adsorption capacity of hexavalent chromium from aqueous solutions. The amidoximated polyacrylonitrile fibers were characterized using Fourier Transform InfraRed spectroscopy (FTIR) and Scanning Electron Microscopy (SEM). The results confirmed the success of polyacrylonitrile fibers modification. The adsorption capacity was evaluated by investigating the effect of initial pH solution ranging from 2.0 to 7.0, the adsorbent dose varied from 0.05 to 0.25 g, the initial Cr (VI) concentration range was (5–70 mg g−1), the temperature varied from 5 to 60°C, and the contact time ranged from 0 to 180 min. We have used the Langmuir and Freundlich adsorption models to describe the equilibrium sorption data. The maximum adsorption capacity estimated using the Langmuir model reached 32. 57 mg g−1 under optimal conditions. The thermodynamic parameters (ΔG, ΔH, and ΔS) were also determined. In addition, the adsorbent showed a desorption rate of Cr (VI) up to 92% with 0.5 mol of NaOH, which can be reused for three adsorption–desorption cycles. The overall data showed the efficiency of amidoximated polyacrylonitrile fibers in removing Cr (VI) from aqueous solutions. © 2019 American Institute of Chemical Engineers Environ Prog, 38:e13146, 2019

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“…Adsorptive removal of toxic metals including cadmium using various adsorbents has been reported as review articles [3][4][5][6][7] and general articles [8,9] . Chitosan is a polysaccharide rich in primary amino groups produced by alkaline hydrolysis of shells of crustacean.…”

Section: Introductionmentioning

confidence: 99%

“…Although the demand for cadmium has been decreased year by year due to the adverse effect caused by its toxicity [2] , cadmium compounds have been still employed for versatile applications such as pigments, batteries and solar panels. Therefore, the effective and selective removal of cadmium from spent materials has been strongly required.Adsorptive removal of toxic metals including cadmium using various adsorbents has been reported as review articles [3][4][5][6][7] and general articles [8,9] . Chitosan is a polysaccharide rich in primary amino groups produced by alkaline hydrolysis of shells of crustacean.…”

mentioning

confidence: 99%

Adsorption Behavior of Dithiocarbamate β-Chitosan Gels for Cadmium(II)

Ohto¹,

Ohta²,

Huang³

et al. 2017

Res. Rev. J Mat. Sci

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Research Article INTRODUCTIONCadmium occurs together with zinc in the majority of zinc ores. Consequently, serious environmental pollutions by cadmium such as Itai-itai disease have been brought by unsuitable control of mining wastes of zinc ores and mining effluents [1] . Although the demand for cadmium has been decreased year by year due to the adverse effect caused by its toxicity [2] , cadmium compounds have been still employed for versatile applications such as pigments, batteries and solar panels. Therefore, the effective and selective removal of cadmium from spent materials has been strongly required.Adsorptive removal of toxic metals including cadmium using various adsorbents has been reported as review articles [3][4][5][6][7] and general articles [8,9] . Chitosan is a polysaccharide rich in primary amino groups produced by alkaline hydrolysis of shells of crustacean. It can be easily chemically modified via these amino groups. This modified chitosan has been investigated as adsorption gels for some metal ions as well as original chitosan [10][11][12][13][14][15][16][17][18] . Adsorptive removal of Cd(II) ion using gels of original unmodified chitosan has been also reported, in which primary amino groups were reported to be effective for adsorption of Cd(II) ion [19][20][21][22] . Muzzarelli et al. [23,24] reported the chemical modification of α-chitosan produced from krill (Euphausia superba) with functional groups of dithiocarbamate, which is abbreviated as DTC hereafter, and also briefly reported its adsorption behavior for some metal ions including Cd(II). In the previous paper [25] , we also prepared lyophilic chitosan containing DTC functional groups for a solvent extraction reagent and found its high selectivity to Cu(II) and Ni(II). The chitosan compounds chemically modified with DTC functional groups are abbreviated as DTC-chitosan, hereafter. In the present paper, the detailed adsorption behavior of DTCchitosan for Cd(II) was investigated from viewpoint of its separation from Zn(II) ion, in particular.According to the Pearson's HSAB theory [26] , Cd(II) is classified as a typical soft Lewis acid. Although nitrogen atoms of the primary amino group are classified as a slightly soft Lewis base exhibiting some affinity to some kinds of metal ions classified as soft Lewis acids, the affinity to Cd(II) ion is expected to be much more increased in case some functional groups containing sulfur atoms, classified as a strong soft Lewis base, such as the DTC group are immobilized onto polymer matrices of chitosan by means ABSTRACT Adsorption gels were prepared by means of chemical modification of β-chitosan by immobilizing functional groups of dithiocarbamate to investigate its adsorption behavior for cadmium(II) such as effect of cross-linking, adsorption rate, pH dependency, loading capacity by batch-wise experimental work and mutual adsorptive separation of cadmium(II) from zinc(II) using a packed column. Thus prepared adsorption gel exhibited high selectivity towards cadmium(II) over zinc(II) and h...

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Adsorption of Toxic Metals on Modified Polyacrylonitrile Nanofibres: A Review

Cited by 63 publications

References 47 publications

1,2,3,4-Tetrahydropyrimidine Derivative for Selective and Fast Uptake of Cadmium Ions from Aqueous Solution

1,2,3,4-Tetrahydropyrimidine Derivative for Selective and Fast Uptake of Cadmium Ions from Aqueous Solution

Synthesis of amidoximated polyacrylonitrile fibers and its use as adsorbent for Cr (VI) ions removal from aqueous solutions

Adsorption Behavior of Dithiocarbamate β-Chitosan Gels for Cadmium(II)

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