Multivariate Optimization of Removing of Cobalt(II) with an Efficient Aminated-GMA Polypropylene Adsorbent by Induced-Grafted Polymerization under Simultaneous Gamma-Ray Irradiation

Abstract Nowadays, radiation grafting polymer adsorbents have been widely developed due to their advantages, such as low operating cost, high efficiency. In this research, glycidyl methacrylate monomers by simultaneous irradiation of gamma-ray with a dose of 20 kGy were grafted on polypropylene polymer fibers. The grafted polymer was then modified using different amino groups and tested for adsorption of cobalt ions in an aqueous solution. Finally, modified polymer adsorbent with the high efficiency for cobalt ions adsorption was synthesized and tested for further investigation. Different modes of cobalt ions adsorption were tested in other adsorption conditions, including adsorption contact time, pH, different amounts of adsorbent mass, and different concentrations of cobalt ions solution. The adsorbent structure was characterized with FT-IR, and SEM techniques and illustrated having an efficient grafting percentage and adsorption capability for cobalt removing by batch experiments. The optimum conditions were obtained by a central composite design as follows: adsorbent mass = 0.07 g, initial concentration = 40 mg/L, time = 182 min, and pH = 4.5 with ethylenediamine as a modified monomer and high amination percentage. The features such as inexpensive adsorbent, easy to prepare, high efficiency, and stability allow the radiated-induced grafted adsorbent to constitute one of promising materials for heavy metals remediation.

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Multivariate optimization of removing of cobalt(II) with an efficient aminated-GMA polypropylene adsorbent by induced-grafted polymerization under simultaneous gamma-ray irradiation

Scientific Reports ◽

10.1038/s41598-021-97826-y ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Fatemeh Maleki ◽

Mobina Gholami ◽

Rezvan Torkaman ◽

Meisam Torab-Mostaedi ◽

Mehdi Asadollahzadeh

Keyword(s):

High Efficiency ◽

Gamma Ray ◽

Operating Cost ◽

Polymer Fibers ◽

Maximum Adsorption Capacity ◽

Cobalt Ions ◽

Grafted Polymer ◽

Modified Polymer ◽

Pseudo Second Order ◽

Gamma Ray Irradiation

AbstractNowadays, radiation grafting polymer adsorbents have been widely developed due to their advantages, such as low operating cost, high efficiency. In this research, glycidyl methacrylate monomers were grafted on polypropylene polymer fibers by simultaneous irradiation of gamma-ray with a dose of 20 kGy. The grafted polymer was then modified using different amino groups and tested for adsorption of cobalt ions in an aqueous solution. Finally, the modified polymer adsorbent with a high efficiency for cobalt ions adsorption was synthesized and tested. Different modes of cobalt ions adsorption were tested in other adsorption conditions, including adsorption contact time, pH, different amounts of adsorbent mass, and different concentrations of cobalt ions solution. The adsorbent structure was characterized with FT-IR, XRD, TG and SEM techniques and illustrated having an efficient grafting percentage and adsorption capability for cobalt removing by batch experiments. The optimum conditions were obtained by a central composite design: adsorbent mass = 0.07 g, initial concentration = 40 mg/L, time = 182 min, and pH = 4.5 with ethylenediamine as a modified monomer and high amination percentage. Kinetics and equilibrium isotherms observation described that the experimental data followed pseudo-second-order and Langmuir models, respectively. The maximum adsorption capacity from Langmuir isotherm capacity is obtained equal to 68.02 mg/g.

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PREPARATION OF HYDROPHILIC POLYMER FILM BY GRAFTING OF MALEIC ANHYDRIDE ONTO POLYETHYLENE BY γ-IRRADIATION METHOD

International Journal of Nanoscience ◽

10.1142/s0219581x06004437 ◽

2006 ◽

Vol 05 (02n03) ◽

pp. 331-337 ◽

Cited By ~ 2

Author(s):

YOUNG SOO KANG ◽

SONG LEE

Keyword(s):

Maleic Anhydride ◽

Polymer Film ◽

Contact Angles ◽

Γ Irradiation ◽

Water Contact ◽

Grafted Polymer ◽

Modified Polymer ◽

Bond Scission ◽

Molecular Bond ◽

Ft Ir

The method of γ-irradiation grafting of maleic anhydride onto polyethylene films was studied. The γ-irradiation causes molecular bond scission and produces free radical sites on the polyethylene. This process was carried out at different γ-irradiation doses from a Cobalt-60 source and different concentration of MAH. The microstructure of modified polymer film has been characterized by Fourier transform infrared (FT-IR) spectroscopy, nuclear magnetic resonance (NMR), and the thermal properties of the grafted products were also studied by thermogravimetric analysis (TGA). The degree of hydrophilicity was investigated into water contact angle and surface free energy determination. The surface free energies of the grafted polymer films were studied by measuring the contact angles of water and diiodomethane.

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Synthesis of Platinum Nanoparticles by Gamma Co-60 Ray Irradiation Method Using Chitosan as Stabilizer

Advances in Materials Science and Engineering ◽

10.1155/2019/9624374 ◽

2019 ◽

Vol 2019 ◽

pp. 1-5 ◽

Cited By ~ 2

Author(s):

Thi Kim Lan Nguyen ◽

Ngoc Duy Nguyen ◽

Van Phu Dang ◽

Dinh Tuan Phan ◽

Thai Hoa Tran ◽

...

Keyword(s):

Electron Microscopy ◽

Transmission Electron Microscopy ◽

Fourier Transform ◽

Platinum Nanoparticles ◽

Gamma Ray ◽

Visible Spectroscopy ◽

Chitosan Concentration ◽

Transmission Electron ◽

Gamma Ray Irradiation ◽

Ft Ir

Platinum nanoparticles were synthesized using the gamma-ray irradiation as a reducing factor and chitosan as a stabilizer. The prepared platinum nanoparticles were characterized using ultraviolet-visible spectroscopy (UV-Vis), transmission electron microscopy (TEM), and Fourier-transform infrared spectroscopy (FT-IR). The saturated conversion dose to reduce the Pt4+ to Pt0 was found to be about 14 kGy for initial Pt4+ concentration of 1 mM. The size of the platinum nanoparticles (1.4–1.6 nm) did almost not change with the increase of chitosan concentration from 0.5 to 2.0%. Thus, gamma Co-60 ray irradiation method is favorable for synthesizing PtNPs with the small sizes.

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Characterization of modified PVDF membrane by gamma irradiation for non-potable water reuse

Water Science & Technology ◽

10.2166/wst.2015.056 ◽

2015 ◽

Vol 71 (6) ◽

pp. 947-954

Author(s):

Seung Joo Lim ◽

Tak-Hyun Kim ◽

In Hwan Shin

Keyword(s):

Contact Angle ◽

Water Permeability ◽

Photoelectron Spectroscopy ◽

Water Reuse ◽

Potable Water ◽

Gamma Ray ◽

Membrane Surface ◽

Monomer Concentration ◽

Gamma Ray Irradiation ◽

Ft Ir

Poly(vinylidene fluorine) (PVDF) membranes were grafted by gamma-ray irradiation and were sulfonated by sodium sulfite to modify the surface of the membranes. The characteristics of the modified PVDF membranes were evaluated by the data of Fourier transform infrared (FT-IR), X-ray photoelectron spectroscopy (XPS), field-emission scanning electron microscope (FE-SEM), the contact angle of the membrane surface and the water permeability. From the results of FT-IR, XPS and FE-SEM, it was shown that the modified membranes were successfully grafted by gamma-ray irradiation and were sulfonated. The content of oxygen and sulfur increased with the monomer concentration, while the content of fluorine sharply decreased. The pore size of the modified membranes decreased after gamma-ray irradiation. The contact angle and the water permeability showed that the hydrophilicity of the modified membranes played a role in determining the membrane performance. The feasibility study of the modified PVDF membranes for using non-potable water reuse were carried out using a laboratory-scale microfiltration system. Grey wastewater was used as the influent in the filtration unit, and permeate quality satisfied non-potable water reuse guidelines in the Republic of Korea.

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Polarized microbeam FT-IR analysis of single fibers

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100163496 ◽

1996 ◽

Vol 54 ◽

pp. 206-207

Author(s):

Liling Cho ◽

David L. Wetzel

Keyword(s):

Molecular Orientation ◽

Transition Point ◽

Polymer Fibers ◽

Single Fiber ◽

Wire Grid ◽

Polyester Fibers ◽

Ft Ir ◽

Ir Analysis ◽

The Relationship ◽

Wire Grid Polarizer

Polarized infrared microscopy has been used for forensic purposes to differentiate among polymer fibers. Dichroism can be used to compare and discriminate between different polyester fibers, including those composed of polyethylene terephthalate that are frequently encountered during criminal casework. In the fiber manufacturering process, fibers are drawn to develop molecular orientation and crystallinity. Macromolecular chains are oriented with respect to the long axis of the fiber. It is desirable to determine the relationship between the molecular orientation and stretching properties. This is particularly useful on a single fiber basis. Polarized spectroscopic differences observed from a single fiber are proposed to reveal the extent of molecular orientation within that single fiber. In the work presented, we compared the dichroic ratio between unstretched and stretched polyester fibers, and the transition point between the two forms of the same fiber. These techniques were applied to different polyester fibers. A fiber stretching device was fabricated for use on the instrument (IRμs, Spectra-Tech) stage. Tension was applied with a micrometer screw until a “neck” was produced in the stretched fiber. Spectra were obtained from an area of 24×48 μm. A wire-grid polarizer was used between the source and the sample.

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