The study of adsorption characteristics Cu2+ and Pb2+ ions onto PHEMA and P(MMA-HEMA) surfaces from aqueous single solution

Moradi, Omid; Aghaie, Mehran; Zare, Kazem; Monajjemi, Majid; Aghaie, H.

doi:10.1016/j.jhazmat.2009.05.012

Cited by 134 publications

(51 citation statements)

References 58 publications

(60 reference statements)

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“…Despite the selectivity and sensitivity of modern analytical techniques, there is a crucial need for the preconcentration of trace elements before their analysis. Consequently, several different types of methods, such as chemical precipitation [1,2], solvent extraction [3], nanofiltration [4], and adsorption [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22], have been used for the removal of heavy metal ions.…”

Section: Introductionmentioning

confidence: 99%

“…Up to now, a variety of adsorbents have been reported as materials for the adsorption of heavy metals including activated carbon [5,6], modified silica gel [7,8], multiwalled carbon nanotubes (MWCNTs) [9,10], biomaterials [11], ion-imprinted materials [12,13], polymers [14][15][16][17][18], inorganic materials [19], and sorption resins [20][21][22]. For example, thiourea-modified magnetic chitosan microspheres (TMCS) have been prepared by Zhou et al [11].…”

Section: Introductionmentioning

confidence: 99%

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Adsorption of Cu(II), Pb(II), Co(II), Ni(II), and Cd(II) from aqueous solution by poly(aryl ether ketone) containing pendant carboxyl groups (PEK-L): Equilibrium, kinetics, and thermodynamics

Zhao

Zhang

Jia

et al. 2011

Chemical Engineering Journal

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Adsorption of Cu(II), Pb(II), Co(II), Ni(II), and Cd(II) from aqueous solution by poly(aryl ether ketone) containing pendant carboxyl groups (PEK-L): Equilibrium, kinetics, and thermodynamics

Zhao

Zhang

Jia

et al. 2011

Chemical Engineering Journal

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“…Fig. 5 shows that the 4C2NP adsorption by graphene was decreased by increasing the temperature from 298 to 328 K. It may be due to this fact that at low temperatures, more active sites are available [31].…”

Section: Effect Of Temperaturementioning

confidence: 93%

Decontamination of 4-Chloro-2-Nitrophenol from Aqueous Solution by Graphene Adsorption: Equilibrium, Kinetic, and Thermodynamic Studies

Mehrizad¹,

Gharbani²

2014

Pol. J. Environ. Stud.

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Phenol and its compounds are one of the major materials commonly used in the petrochemical, coking, coal refining, chemical, and pharmaceutical industries [1,2]. The harmful effects due to the presence of phenols in industrial wastewaters have been confirmed [3,4]. Thus, development of suitable methods for the decontamination of phenols is necessary. Research has studied the removal of phenol from aqueous solutions, including advanced oxidation processes [5,6], biological degradation [7,8], ozonation [9,10], adsorption [11][12][13][14] [19] have been tested for adsorption of phenol and its compounds from aqueous solutions. Among them, carbon materials show significant adsorption yields. This may be because of their large surface area and good distribution of pore size. Therefore, using new carbonaceous materials as adsorbents is interesting for scientists. An example of a new carbonaceous material is graphene, whose atoms are arranged in a 2D honeycomb structure [20]. As literature results show, graphene has a high adsorption capacity for removal of aqueous pollutants [21][22][23][24][25].In the present study, the potential application of graphene for 4-chloro-2-nitrophenol (4C2NP) adsorption Pol. J. Environ. Stud. Vol. 23, No. 6 (2014), 2111-2116 Original (4C2NP) is an important chemical widely used in the pharmaceuticals, herbicide, and pesticide industries. The ability of graphene to remove 4C2NP from aqueous solutions was performed as a function of contact time, amounts of adsorbent, pH, initial 4C2NP concentrations, and temperatures using a batch technique. Based on the results, the amount of 4C2NP adsorption increased with increasing initial concentration, whereas the alkaline pH range, higher graphene dosage, and higher temperature were unfavorable. Non-linear regression methods suggest that the isotherm data can be well described by the Freundlich isotherm equation. The adsorption kinetic data were analyzed using the non-linear rate equations of pseudo-first and pseudo-second order. It was found that the pseudo-second-order kinetic model was the most appropriate model, describing the adsorption kinetics. The observed changes in the standard Gibbs free energy (ΔGº), standard enthalpy (ΔHº), and standard entropy (ΔSº) show that the adsorption of 4C2NP by graphene is feasible, spontaneous, and exothermic in the temperature range 298-328 K.

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“…At low pH values, hydronium ions have high concentration and more tendencies to be adsorbed, so hydronium ions are adsorbed more than Cd 2+ ions. 30,31 Hydronium ions concentration decreases with increasing pH, hence this decrease results in Cd 2+ ions being better and more adsorbed. [30][31][32] .…”

Section: Effect Of Phmentioning

confidence: 99%

“…30,31 Hydronium ions concentration decreases with increasing pH, hence this decrease results in Cd 2+ ions being better and more adsorbed. [30][31][32] . The reason of higher adsorption at higher pH values may also be that Cd 2+ interact with CB, RG and CR not only through the nitrogen and oxygen atoms by chelating, but also through -SO3H groups by cation-exchange, which is unprotonated at high pH.…”

Section: Effect Of Phmentioning

confidence: 99%

Cadmium Removal Performances of Different Dye Ligands Attached Cryogel Disks

Keleş¹,

Inanan²,

Tüzmen³

et al. 2015

Croat. Chem. Acta

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Abstract. Poly(HEMA) cryogel disks were synthesized by free radical polymerization of 2-hydroxyethylmethacrylate (HEMA), and then Cibacron Blue F3GA (CB), Reactive Green 19 (RG) and Congo Red (CR) were immobilized as dye ligands. Disks were characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM) and swelling degree, porosity calculations. Cd 2+ adsorption experiments were performed for 60 min. Maximum adsorption capacities were determined as 25.5 mg/g; 48.0 mg/g and 28.5 mg/g at pH = 7.0 for poly(HEMA)-CB; poly(HEMA)-RG and poly-(HEMA)-CR, respectively. Langmuir isotherm fitted best with the adsorption data and adsorption thermodynamics showed that Cd 2+ adsorption is thermodynamically favorable and a physisorption process. A great majority of adsorbed Cd 2+ desorbed with 1 M NaCl and cryogel disks can be re-used in adsorption experiments. Cd 2+ removal efficiencies of disks from human plasma are approximately 45 %. Dyeattached cryogel disks synthesized in this study have potential in use for environmental and therapeutic applications.

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The study of adsorption characteristics Cu2+ and Pb2+ ions onto PHEMA and P(MMA-HEMA) surfaces from aqueous single solution

Cited by 134 publications

References 58 publications

Adsorption of Cu(II), Pb(II), Co(II), Ni(II), and Cd(II) from aqueous solution by poly(aryl ether ketone) containing pendant carboxyl groups (PEK-L): Equilibrium, kinetics, and thermodynamics

Adsorption of Cu(II), Pb(II), Co(II), Ni(II), and Cd(II) from aqueous solution by poly(aryl ether ketone) containing pendant carboxyl groups (PEK-L): Equilibrium, kinetics, and thermodynamics

Decontamination of 4-Chloro-2-Nitrophenol from Aqueous Solution by Graphene Adsorption: Equilibrium, Kinetic, and Thermodynamic Studies

Cadmium Removal Performances of Different Dye Ligands Attached Cryogel Disks

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