Articles with "cobalt ions" as a keyword



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A functionalized nanocomposite adsorbent for the sequential removal of radioactive iodine and cobalt ions in aqueous media

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Published in 2020 at "Korean Journal of Chemical Engineering"

DOI: 10.1007/s11814-020-0668-1

Abstract: The need for efficient remediation of the radioactive waste caused by undesirable nuclear accidents and overspending of radionuclides has gained worldwide attention, with extensive recent efforts made to protect the environment from radioactive contamination. Although… read more here.

Keywords: radioactive iodine; iodine; sequential removal; iodine cobalt ... See more keywords
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Boosting oxygen reduction catalysis with tailorable active-N-dominated doped defective CNTs

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Published in 2020 at "Applied Surface Science"

DOI: 10.1016/j.apsusc.2019.143844

Abstract: Abstract Controlled doping of specific N species is considered to be an effective yet a challenging strategy to boost the ORR performance of the N-doped carbon. Herein, we report a facile synthesis of tailored active-N-dominated… read more here.

Keywords: oxygen reduction; doped defective; dominated doped; boosting oxygen ... See more keywords
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Removal of cobalt (II) ions from aqueous solutions utilizing the pre-treated 2-Hypnea Valentiae algae: Equilibrium, thermodynamic, and dynamic studies

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Published in 2018 at "Chemical Engineering Journal"

DOI: 10.1016/j.cej.2017.08.019

Abstract: Abstract The removal of cobalt (II) ions on both raw and pre-treated 2-Hypnea Valentiae algae biomass in a batch system has been investigated. The sorption capacity of the biomass was a function of solution pH,… read more here.

Keywords: treated hypnea; pre treated; valentiae algae; hypnea valentiae ... See more keywords
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Physical and spectroscopic features of cobalt ions in multi-component CaF2–ZnO–Bi2O3–P2O5 glass ceramics

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Published in 2017 at "Journal of Alloys and Compounds"

DOI: 10.1016/j.jallcom.2016.12.334

Abstract: Abstract Multi-component CaF 2 −ZnO–Bi 2 O 3 −P 2 O 5 glasses doped with different concentrations of CoO (ranging from 0 to 1.0 mol %) were crystallized by heat treatment. These samples were characterized by… read more here.

Keywords: zno; multi component; spectroscopic; glass ceramic ... See more keywords
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Dithiothreitol-capped red emitting copper nanoclusters as highly effective fluorescent nanoprobe for cobalt (II) ions sensing

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Published in 2021 at "Microchemical Journal"

DOI: 10.1016/j.microc.2021.105922

Abstract: Abstract Herein, red emitting copper nanoclusters (Cu NCs) were synthesized by employing dithiothreitol (DTT) as both the capping and reducing agent at room temperature. The synthesis route was facile, rapid and efficient. The DTT-Cu NCs… read more here.

Keywords: copper nanoclusters; spectroscopy; emitting copper; cobalt ions ... See more keywords
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Cobalt(II) Ions Connecting [CoII4] Helicates into a 2-D Coordination Polymer Showing Slow Relaxation of the Magnetization.

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Published in 2017 at "Inorganic chemistry"

DOI: 10.1021/acs.inorgchem.7b01640

Abstract: The reactions of cobalt(II) perchlorate with a diazine tetratopic helicand, H4L, in the presence of sodium carbonate afford two coordination polymers constructed from tetranuclear anionic helicates as building blocks: ∞3[Co4L3Na4(H2O)4]·4H2O (1) and ∞2[Co5L3Na2(H2O)9]·2.7H2O·DMF (2). The… read more here.

Keywords: relaxation magnetization; slow relaxation; cobalt; cobalt ions ... See more keywords
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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

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Published in 2021 at "Scientific Reports"

DOI: 10.1038/s41598-021-97826-y

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 were grafted on polypropylene polymer fibers by simultaneous irradiation… read more here.

Keywords: adsorption; irradiation; gamma ray; cobalt ions ... See more keywords
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Ligandless, Task-Specific Ionic Liquid-Based Ultrasound-Assisted Dispersive Liquid–Liquid Microextraction for the Determination of Cobalt Ions by Electrothermal Atomic Absorption Spectrometry

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Published in 2017 at "Analytical Letters"

DOI: 10.1080/00032719.2017.1322095

Abstract: ABSTRACT Ligandless, task-specific ionic liquid based ultrasound-assisted dispersive liquid–liquid microextraction (TSIL-USA-DLLME) was used for preconcentration of cobalt ions in food and water samples and in vitamin supplements before analysis by electrothermal atomic absorption spectrometry. The… read more here.

Keywords: ionic liquid; liquid; determination; microextraction ... See more keywords
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Soft X-Ray Absorption Spectroscopy as a Method to Study Y1–yCayBaCo4–xMxO7 Cobaltites (M = Fe, Zn)

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Published in 2018 at "JETP Letters"

DOI: 10.1134/s0021364018090072

Abstract: Soft X-ray absorption spectroscopy has been used to determine the charge state and content of cobalt ions in doped cobaltites CaBaCo4O7, Y0.5Ca0.5BaCo4O7, Y0.5Ca0.5BaCo4–xFexO7, and Y0.5Ca0.5BaCo4–zZnzO7. A method has been proposed to determine the relative concentrations… read more here.

Keywords: ray absorption; spectroscopy; absorption spectroscopy; soft ray ... See more keywords
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Utilization of Prepared Nanocellulose as a Biopolymer for Adsorption Kinetics of Cobalt Ions from Wastewater

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Published in 2023 at "Polymers"

DOI: 10.3390/polym15092143

Abstract: This study evaluated nanocellulose derived from discarded palm leaves for its ability to remove cobalt ions from industrial wastewater. The process involved extracting cellulose nanocrystals (CNCs) from date palm leaves through a series of repeated… read more here.

Keywords: adsorption; utilization prepared; cobalt ions; pseudo second ... See more keywords