scholarly journals Modification of Sulfonated Polyethersulfone Membrane as a Selective Adsorbent for Co(II) Ions

Polymers ◽  
2021 ◽  
Vol 13 (20) ◽  
pp. 3569
Author(s):  
Gadeer R. Ashour ◽  
Mahmoud A. Hussein ◽  
Tariq R. Sobahi ◽  
Khalid A. Alamry ◽  
Sara A. Alqarni ◽  
...  
Keyword(s):  
Langmuir Adsorption Isotherm ◽  
Icp Oes ◽  
Thermal Stabilities ◽  
Analytical Technique ◽  
Langmuir Adsorption ◽  
Polyethersulfone Membrane ◽  
Solid Adsorbents ◽  
Ft Ir ◽  
Selective Adsorbent ◽  
Sulfonated Polyethersulfone

In the current study, a variety of sulfonated polyethersulfone (SPES)-based ion-exchange membranes were prepared and utilized as efficient and selective solid adsorbents for the detection of Co(II) ions in aquatic solutions. SPES membranes were treated with a variety of cations at a 2:1 ratio overnight. The produced materials were assessed via XRD, FT-IR, SEM, and TGA analyses. The structure of these materials was confirmed by FT-IR and XRD, which also confirmed the inclusion of Na+, NH4+, and amberlite on the SPES surface successfully. TGA analysis showed that the thermal stabilities of these materials were enhanced, and the order of stability was NH4-SPES > SPES > Na-SPES > A-SPES. Furthermore, the efficiency of these modified membranes for the determination and adsorption of a variety of metal ions was also examined by the ICP-OES analytical technique. A-SPES expressed a powerful efficiency of adsorption, and it showed an efficient as well as quantitative adsorption at pH = 6. Moreover, A-SPES displayed the highest adsorption capacity of 90.13 mg/g for Co(II) through the Langmuir adsorption isotherm.

Synthesis of a Novel Hexanedioyl Thiourea Resin and its Adsorption Properties for Ag(I)

2012 ◽  
Vol 217-219 ◽  
pp. 1213-1217
Author(s):  
Zhong Nan Wang ◽  
Hong Zhong ◽  
Shuai Wang
Keyword(s):  
Adsorption Process ◽  
Adsorption Equilibrium ◽  
Interfacial Polymerization ◽  
Langmuir Adsorption Isotherm ◽  
Adsorption Properties ◽  
Chelating Resin ◽  
Langmuir Adsorption ◽  
Polyethylene Polyamine ◽  
Ft Ir ◽  
Equilibrium Adsorption Capacity

A novel hexanedioyl thiourea chelating resin(HTR) was synthesized through interfacial polymerization of hexanedioyl diisothiocyanate and polyethylene polyamine. Its structure was confirmed by FT-IR. The adsorption properties of HTR for Ag(I) were investigated by batch operation . The results show that the adsorption equilibrium of HTR for Ag(I) is achieved after 12 hour at 20°C, the equilibrium adsorption capacity is 4.56mmol/g and increases as the temperature or pH rises, the adsorption process accords with G. E. Boyd equation and Langmuir adsorption isotherm as well, and the silver-loaded resins can be quantitatively eluted by a solution containing 6% thiourea in 1mol/L HNO3.

Synthesis and Adsorption Properties for Ag(I) of Pyridinedicanbnyl Thiourea Resin

2012 ◽  
Vol 581-582 ◽  
pp. 180-184 ◽  
Author(s):  
Zhong Nan Wang ◽  
Hong Zhong ◽  
Shuai Wang
Keyword(s):  
Adsorption Isotherm ◽  
Adsorption Process ◽  
Adsorption Equilibrium ◽  
Langmuir Adsorption Isotherm ◽  
Adsorption Properties ◽  
Chelating Resin ◽  
Batch Operation ◽  
Langmuir Adsorption ◽  
Ft Ir ◽  
Equilibrium Adsorption Capacity

A novel pyridinedicanbnyl thiourea chelating resin(PTR) was synthesized from pyridinedicanbnyl diisothiocyanate and diethylene triarmine , its structure was confirmed by FT-IR. The adsorption properties of PTR for Ag(I) were investigated by batch operation . The results show that the adsorption equilibrium of PTR for Ag(I) is achieved after 14 hour at 25°C, the equilibrium adsorption capacity is 4.73mmol/g, the adsorption process accords with G. E. Boyd equation and Langmuir adsorption isotherm as well,and the silver-loaded resins can be quantitatively eluted by a solution containing 6% thiourea in 1mol/L HNO3.

scholarly journals CHARACTERISTICS OF Chlorella sp BIOMASS IMMOBILIZED ON CHITOSAN (Chlo-Kit) FOR ADSORPTION OF CHROMIUM(III) SOLUTION

2016 ◽  
Vol 11 (1) ◽  
pp. 15
Author(s):  
Titin Anita Zaharah ◽  
Anis Shofiyani ◽  
Endah Sayekti
Keyword(s):  
Metal Ion ◽  
Electrostatic Interactions ◽  
Langmuir Adsorption Isotherm ◽  
Chitosan Hydrogel ◽  
Langmuir Adsorption ◽  
Chlorella Sp ◽  
Optimum Ph ◽  
Ir Spectrophotometry ◽  
Ft Ir ◽  
Biomass Immobilization

<p>Properties of biosorbent prepared from biomass of <em>Chlorella </em>sp immobilized on chitosan (Chlo-Kit) have been studied for adsorption of Chromium(III). Chlo-Kit adsorbent prepared by following steps: dissolving chitosan to get hydrogel form, immobilization of biomasson chitosan hydrogel, <em>beads </em>formation and crosslinkingthe adsorbent beads using epichlorohydrin reagent.</p>Characterization using FT-IR spectrophotometry  and SEM showed that mechanism of biomass immobilization on chitosan involves electrostatic interactions between the functional groups of such both materials. Biomass immobilized on chitosan (Chlo-Kit) showed the higher stability in acid medium than un-immobilized biomass. Adsorption of Cr(III) metal ion on Chlo-Kit occured at optimum pH of 4-5 and followed well the Langmuir adsorption isotherm model. The adsorption capacity of Cr(III) on Chlo-Kit was 68.965 mg/g, about 91% higher than that on Chlorella biomass

CHARACTERISTICS OF Chlorella sp BIOMASS IMMOBILIZED ON CHITOSAN (Chlo-Kit) FOR ADSORPTION OF CHROMIUM(III) SOLUTION

2015 ◽  
Vol 11 (1) ◽  
pp. 15
Author(s):  
Titin Anita Zaharah ◽  
Anis Shofiyani ◽  
Endah Sayekti
Keyword(s):  
Metal Ion ◽  
Electrostatic Interactions ◽  
Langmuir Adsorption Isotherm ◽  
Chitosan Hydrogel ◽  
Langmuir Adsorption ◽  
Chlorella Sp ◽  
Optimum Ph ◽  
Ir Spectrophotometry ◽  
Ft Ir ◽  
Biomass Immobilization

<p>Properties of biosorbent prepared from biomass of <em>Chlorella </em>sp immobilized on chitosan (Chlo-Kit) have been studied for adsorption of Chromium(III). Chlo-Kit adsorbent prepared by following steps: dissolving chitosan to get hydrogel form, immobilization of biomasson chitosan hydrogel, <em>beads </em>formation and crosslinkingthe adsorbent beads using epichlorohydrin reagent.</p>Characterization using FT-IR spectrophotometry  and SEM showed that mechanism of biomass immobilization on chitosan involves electrostatic interactions between the functional groups of such both materials. Biomass immobilized on chitosan (Chlo-Kit) showed the higher stability in acid medium than un-immobilized biomass. Adsorption of Cr(III) metal ion on Chlo-Kit occured at optimum pH of 4-5 and followed well the Langmuir adsorption isotherm model. The adsorption capacity of Cr(III) on Chlo-Kit was 68.965 mg/g, about 91% higher than that on Chlorella biomass

Investigation of chocolate types on the content of selected metals and non-metals determined by ICP-OES analytical technique

2020 ◽  
pp. 1-11
Author(s):  
Katarzyna Karaś ◽  
Anetta Zioła-Frankowska ◽  
Małgorzata Bartoszewicz ◽  
Grzegor Krzyśko ◽  
Marcin Frankowski
Keyword(s):  
Icp Oes ◽  
Analytical Technique

Preparation and Properties of Silicon-Containing Arylacetylene Resins with Octa(maleimidophenyl)silsesquioxane

2012 ◽  
Vol 557-559 ◽  
pp. 1152-1156
Author(s):  
Yan Zhou ◽  
Fu Wei Huang ◽  
Fa Rong Huang ◽  
Lei Du
Keyword(s):  
Thermal Stability ◽  
Dielectric Constant ◽  
Dielectric Properties ◽  
Thermal Polymerization ◽  
Curing Process ◽  
Thermal Stabilities ◽  
Curing Reaction ◽  
Air Atmosphere ◽  
Ft Ir ◽  
Dsc Analyses

Modified silicon-containing arylacetylene resins (DMSEPE-OMPS) were prepared from poly(dimethylsilyleneethynylenephenyleneethynylene) (DMSEPE) and Octa(maleimidophenyl)- silsesquioxane (OMPS). The curing reaction of DMSEPE-OMPS resin was studied by FT-IR and DSC techniques. Thermal stability and dielectric properties of cured DMSEPE-OMPS resins were determined. FT-IR and DSC analyses indicate that thermal polymerization of DMSEPE-OMPS resin occurs in the curing process. Thermal stabilities of cured DMSEPE-OMPS resins under N2 and air atmosphere decrease gradually with the increment of OMPS components. The incorporation of OMPS can obviously reduce dielectric constant of DMSEPE-OMPS resins.

scholarly journals Diffusion of calcium ions in retinal rods. A theoretical calculation.

1981 ◽  
Vol 77 (4) ◽  
pp. 475-487 ◽  
Author(s):  
S McLaughlin ◽  
J Brown
Keyword(s):  
Diffusion Coefficient ◽  
Adsorption Isotherm ◽  
Calcium Ions ◽  
Outer Segment ◽  
Effective Diffusion ◽  
Langmuir Adsorption Isotherm ◽  
Diffuse Double Layer ◽  
Langmuir Adsorption ◽  
Retinal Rods ◽  
Disk Membrane

The Fick diffusion equation is combined with the Langmuir adsorption isotherm and the relevant equations from the Gouy-Chapman theory of the electrical diffuse double layer to demonstrate that the effective diffusion coefficient of calcium ions, both in the cytoplasm of the rod outer segment and within the aqueous space bounded by the disk membrane, should be reduced by a factor of 10-100 because these ions adsorb to phospholipids present in the disk membrane.

A further note on the measurement of the affinity of a dye (Azure A) for histological substrates

1965 ◽  
Vol s3-106 (76) ◽  
pp. 299-306
Author(s):  
D. J. GOLDSTEIN
Keyword(s):  
Adsorption Isotherm ◽  
Goblet Cell ◽  
Binding Sites ◽  
Langmuir Isotherm ◽  
Langmuir Adsorption Isotherm ◽  
Intestinal Epithelial ◽  
Langmuir Adsorption ◽  
Azure A ◽  
First Approximation ◽  
The Ideal

If two histological sections, of thickness nµ and 2nµ, and having the same apparent intensity of staining, are at equilibrium with dyebaths of concentration B1 and B2 respectively, the affinity of the histological substrate for the dye is, under denned conditions, given by the expression ΔF° = - RT In I/B, where B is either (i) B2 if the thinner section is stained to saturation, or (ii) B1 if B1 = 3B2. The affinity tends to be greater when measured in a weaker dyebath, as implied in method (ii). Evidence is presented suggesting that the uptake of the basic dye Azure A by pancreatic basal chromidial substance, goblet cell mucin and intestinal epithelial cytoplasm follows a Langmuir adsorption isotherm to a first approximation, in that, at low dyebath concentrations, the uptake of dye is proportional to the concentration of dyebath with which the substrate is in equilibrium, while in strong dyebaths the uptake approaches a plateau. A deviation from the ideal Langmuir isotherm in dyebaths of moderate concentration, observed in epithelial cytoplasm and to a lesser extent in pancreatic basal chromidial substance, may have been due to interaction between neighbouring dye-binding sites, or to the presence in a single area of sites with different affinities for the dye.

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