Highly efficient extraction of uranium from strong HNO3 media achieved on a phosphine oxide functionalized superparamagnetic composite polymer microspheres

2021 ◽  
Author(s):  
Shiao Zhang ◽  
Dingzhong Yuan ◽  
Jizhou Zhao ◽  
Guangyuan Ren ◽  
Xiaohong Zhao ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Phosphine Oxide ◽  
Nuclear Energy ◽  
Acidic Solution ◽  
Polymer Microspheres ◽  
Adsorption Efficiency ◽  
Composite Polymer ◽  
High Adsorption ◽  
Efficient Extraction ◽  
P Recovery

Recovery of uranium from strong acidic solution using magnetic nanoparticles as adsorbents is very important for sustainable nuclear energy, due to their superparamagnetic character and high adsorption efficiency for uranium....

Highly efficient removal of uranium from highly acidic media achieved using a phosphine oxide and amino functionalized superparamagnetic composite polymer adsorbent

2020 ◽  
Vol 8 (21) ◽  
pp. 10925-10934 ◽  
Author(s):  
Shiao Zhang ◽  
Dingzhong Yuan ◽  
Qinghua Zhang ◽  
Yun Wang ◽  
Yan Liu ◽  
...  
Keyword(s):  
Phosphine Oxide ◽  
Acidic Solution ◽  
Acid Resistance ◽  
Adsorption Efficiency ◽  
Magnetic Adsorbent ◽  
Composite Polymer ◽  
Efficient Removal ◽  
Acidic Media ◽  
Distillation Precipitation Polymerization ◽  
Polymer Adsorbent

The magnetic adsorbent Fe3O4/P(DMAA–DMP) prepared by distillation-precipitation polymerization not only showed an outstanding adsorption efficiency for uranium in highly acidic solution, but had an excellent acid resistance.

scholarly journals Adsorption Studies on Magnetic Nanoparticles Functionalized with Silver to Remove Nitrates from Waters

Water ◽  
2021 ◽  
Vol 13 (13) ◽  
pp. 1757
Author(s):  
Yesica Vicente-Martínez ◽  
Manuel Caravaca ◽  
Antonio Soto-Meca ◽  
Miguel Ángel Martín-Pereira ◽  
María del Carmen García-Onsurbe
Keyword(s):  
Magnetic Nanoparticles ◽  
Nitrate Content ◽  
Adsorption Efficiency ◽  
Experimental Conditions ◽  
Dependent Behavior ◽  
Before And After ◽  
Naoh Solution ◽  
High Concentrations ◽  
Interference Studies

This paper presents a novel procedure for the treatment of contaminated water with high concentrations of nitrates, which are considered as one of the main causes of the eutrophication phenomena. For this purpose, magnetic nanoparticles functionalized with silver (Fe3O4@AgNPs) were synthesized and used as an adsorbent of nitrates. Experimental conditions, including the pH, adsorbent and adsorbate dose, temperature and contact time, were analyzed to obtain the highest adsorption efficiency for different concentration of nitrates in water. A maximum removal efficiency of 100% was reached for 2, 5, 10 and 50 mg/L of nitrate at pH = 5, room temperature, and 50, 100, 250 and 500 µL of Fe3O4@AgNPs, respectively. The characterization of the adsorbent, before and after adsorption, was performed by energy dispersive X-ray spectroscopy, scanning electron microscopy, Brunauer-Emmett-Teller analysis and Fourier-transform infrared spectroscopy. Nitrates can be desorbed, and the adsorbent can be reused using 500 µL of NaOH solution 0.01 M, remaining unchanged for the first three cycles, and exhibiting 90% adsorption efficiency after three regenerations. A deep study on equilibrium isotherms reveals a pH-dependent behavior, characterized by Langmuir and Freundlich models at pH = 5 and pH = 1, respectively. Thermodynamic studies were consistent with physicochemical adsorption for all experiments but showed a change from endothermic to exothermic behavior as the temperature increases. Interference studies of other ions commonly present in water were carried out, enabling this procedure as very selective for nitrate ions. In addition, the method was applied to real samples of seawater, showing its ability to eliminate the total nitrate content in eutrophized waters.

scholarly journals Solvent-Free Synthesis of Phosphonic Graphene Derivative and Its Application in Mercury Ions Adsorption

Nanomaterials ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 485
Author(s):  
Robert Olszewski ◽  
Małgorzata Nadolska ◽  
Marcin Łapiński ◽  
Marta Prześniak-Welenc ◽  
Bartłomiej Cieślik ◽  
...  
Keyword(s):  
Adsorption Efficiency ◽  
Mercury Ions ◽  
High Adsorption ◽  
Adsorption Selectivity ◽  
Nickel Ions ◽  
Cadmium Ions ◽  
First Order ◽  
Bivalent Ions ◽  
Pseudo Second Order ◽  
Solvent Free Synthesis

Functionalized graphene was efficiently prepared through ball-milling of graphite in the presence of dry ice. In this way, oxygen functional groups were introduced into material. The material was further chemically functionalized to produce graphene derivative with phosphonic groups. The obtained materials were characterized by spectroscopic and microscopic methods, along with thermogravimetric analysis. The newly developed material was used as an efficient mercury adsorbent, showing high adsorption efficiency. The adsorption isotherms were fitted using Freundlich and Langmuir models. The adsorption kinetics were fitted with pseudo-first order and pseudo-second order models. Adsorption selectivity was determined in the presence of cadmium ions and nickel ions. The presence of mentioned bivalent ions in the solution did not affect mercury adsorption efficiency.

scholarly journals Characterization and Functionality of Immidazolium Ionic Liquids Modified Magnetic Nanoparticles

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Ying Li ◽  
Ning Tang ◽  
Fuyuhiko Inagaki ◽  
Chisato Mukai ◽  
Kazuichi Hayakawa
Keyword(s):  
Ionic Liquids ◽  
Magnetic Nanoparticles ◽  
Extraction Efficiency ◽  
Alkyl Chain ◽  
Organic Pollutant ◽  
High Adsorption ◽  
Transmission Electron ◽  
Polycyclic Aromatic ◽  
One Step ◽  
Modified Magnetic Nanoparticles

1,3-Dialkylimidazolium-based ionic liquids were chemically synthesized and bonded on the surface of magnetic nanoparticles (MNPs) with easy one-step reaction. The obtained six kinds of ionic liquid modified MNPs were characterized with transmission electron microscopy, thermogravimetric analysis, magnetization, and FTIR, which owned the high adsorption capacity due to the nanometer size and high-density modification with ionic liquids. Functionality of MNPs with ionic liquids greatly influenced the solubility of the MNPs with organic solvents depending on the alkyl chain length and the anions of the ionic liquids. Moreover, the obtained MNPs showed the specific extraction efficiency to organic pollutant, polycyclic aromatic hydrocarbons, while superparamagnetic property of the MNPs facilitated the convenient separation of MNPs from the bulks water samples.

Facilely recoverable Pb(II) adsorbent based on greigite (Fe3S4) loaded alginate aerogel with high adsorption efficiency

Chemosphere ◽  
2021 ◽  
pp. 133264
Author(s):  
Ling-min Lan ◽  
Bu-ning Liu ◽  
Wei-xiong Li ◽  
Huaitian Bu ◽  
Tian Hu ◽  
...  
Keyword(s):  
Adsorption Efficiency ◽  
High Adsorption

scholarly journals Design of composite polymer microspheres.

Hyomen Kagaku ◽  
1987 ◽  
Vol 8 (5) ◽  
pp. 446-453 ◽  
Author(s):  
Kunio FURUSAWA
Keyword(s):  
Polymer Microspheres ◽  
Composite Polymer

scholarly journals Magnetic graphene oxide-nano zero valent iron (GO–nZVI) nanohybrids synthesized using biocompatible cross-linkers for methylene blue removal

RSC Advances ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 963-973 ◽  
Author(s):  
Novin Mehrabi ◽  
Arvid Masud ◽  
Moyosore Afolabi ◽  
Jinwoo Hwang ◽  
Gabriel A. Calderon Ortiz ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Graphene Oxide ◽  
Green Synthesis ◽  
Synthesis Method ◽  
Zero Valent Iron ◽  
Adsorption Efficiency ◽  
High Adsorption ◽  
Magnetic Graphene Oxide ◽  
Methylene Blue Removal ◽  
Nano Zero Valent Iron

A green synthesis method was used to prepare GO–nZVI nanohybrids to provide an adsorbent with high adsorption efficiency that can be removed from aqueous solutions easily by magnetic separation.

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