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Journal Article 7

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Magnetite 3

Adsorption 1

Diphenylarsinic acid (DPAA) 1

EXAFS 1

Fe3O4 nanoparticles 1

Fe3O4/salicylic acid nanocomposite 1

Lattice oxygen 1

Mill-scale 1

Phosphate 1

Platinum metals 1

Sequential extraction 1

Siderite 1

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Strong metal-support interaction (SMSI) 1

Surface oxygen vacancy 1

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cadmium 1

carbonate precipitation 1

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Adsorption of phosphate on magnetite-enriched particles (MEP) separated from the mill scale

Muhammad Kashif Shahid, Yunjung Kim, Young-Gyun Choi

Frontiers of Environmental Science & Engineering 2019, Volume 13, Issue 5, doi: 10.1007/s11783-019-1151-2

Abstract: In present study, the phosphate adsorption on novel magnetite-enriched particles (MEP) was comprehensivelyThe XRD and XRF analysis of MEP identified the dominant existence of crystalline magnetite.Furthermore, the morphological analysis of MEP confirmed the agglomerate porous morphology of magnetiteOxygen and iron, the main constituents of magnetite were acknowledged during the elemental analysis using

Keywords: Adsorption     Magnetite     Mill-scale     Phosphate     Wastewater treatment    

Nanosized magnetite in low cost materials for remediation of water polluted with toxic metals, azo- and

María Fernanda HORST,Verónica LASSALLE,María Luján FERREIRA

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 5,   Pages 746-769 doi: 10.1007/s11783-015-0814-x

Abstract: Nanosized magnetite has emerged as an adsorbent of pollutants in water remediation.

Keywords: nanomagnetite     water remediation     toxic metals     dyes     supported magnetite    

Sorption mechanisms of diphenylarsinic acid on natural magnetite and siderite: Evidence from sorption

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 9, doi: 10.1007/s11783-022-1547-2

Abstract:

• DPAA sorption followed pseudo-secondary and intra-particle diffusion models.

Keywords: Diphenylarsinic acid (DPAA)     Sorption     Magnetite     Siderite     Sequential extraction     EXAFS    

Development of a magnetite-gene complex for gene transfection

Jian XIN BM, Ze-Feng XIA MD, Kai-Xiong TAO MD, Kai-Lin CAI PhD, Gao-Xiong HAN MD, Xiao-Ming SHUAI MD, Ji-Liang WANG MD, Han-Song DU MD, Guo-Bin WANG PhD, Yan LUO MM,

Frontiers of Medicine 2010, Volume 4, Issue 2,   Pages 241-246 doi: 10.1007/s11684-010-0032-7

Abstract: The key to successful gene therapy is to find a suitable method and carrier for transfection to allow a gene to be transferred into a cell and integrated into the target gene. The aim of this study was to determine whether biomagnetic material could be combined with the nucleic acid for gene transfection. Dextran-coated iron oxide nanoparticles (DCIONPs) were prepared and mixed with the plasmid pGenesil-1 containing the test gene, which expresses enhanced green fluorescent protein (eGFP). PGenesil-1 empty vector was used as a control. The binding ability was assessed by electrophoresis of the DNA on agarose gels and quantification using BANDSCAN software. Using different gene carriers, Lipofectamine 2000, Sofast, and DCIONPs, the large intestine cancer (Lovo) cell line was transfected with or without a magnetic field. The expression of eGFP was observed by fluorescence microscopy, and the transfection efficiency was compared. The results showed there was a rapid increase in combining rate when the quality ratio of DCIONPs and pGenesil-1 ascended from 1∶1 to 5∶1. However, the combining rate increased less rapidly as the quality ratio continued ascending. The expression of eGFP showed that the early transfection rate could be improved by applying a magnetic field. In conclusion, the DCIONPs we synthesized are able to carry plasmid DNA and enhance the early transfection efficiency when using a magnetic field.

Keywords: nanoparticle     magnetite     gene therapy     magnetofection    

A magnetic adsorbent based on salicylic acid-immobilized magnetite nano-particles for pre-concentration

Hossein Abdolmohammad-Zadeh, Arezu Salimi

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 2,   Pages 450-459 doi: 10.1007/s11705-020-1930-0

Abstract: In this research, an eco-friendly magnetic adsorbent based on Fe O /salicylic acid nanocomposite was fabricated using a facile one-pot co-precipitation method. The crystalline and morphological characterization of the prepared nanocomposite was performed by field emission scanning electron microscopy, X-ray diffraction, and Fourier transform infrared spectroscopy. The nanocomposite was employed as a magnetic solid-phase extraction agent for separation of Cd(II) ions from synthetic solutions. Some experimental factors affecting the extraction efficiency were investigated and optimized. Following elution with acetic acid (pH 3.5), the pre-concentrated analyte was quantified by flame atomic absorption spectrometry. In optimal conditions, a linear calibration graph was achieved in the concentration range of 0.2‒30 ng·mL with a determination coefficient ( ) of 0.9953. The detection limit, the enhancement factor, inter- and intra-day relative standard deviations (for six consecutive extractions at the concentration level of 10 ng·mL ) were 0.04 ng·mL , 100, 2.38% and 1.52%, respectively. To evaluate the accuracy of the method, a certified reference material (NIST SRM 1643e) was analyzed, and there was a good agreement between the certified and the measured values. It was successfully utilized to determine cadmium in industrial wastewater samples and the attained relative recovery values were between 96.8% and 103.2%.

Keywords: cadmium     magnetic solid-phase extraction     Fe3O4 nanoparticles     Fe3O4/salicylic acid nanocomposite     flame atomic absorption spectrometry    

Coextraction of vanadium and manganese from high-manganese containing vanadium wastewater by a solvent extraction-precipitation process

Zishuai Liu, Yimin Zhang, Zilin Dai, Jing Huang, Cong Liu

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 5,   Pages 902-912 doi: 10.1007/s11705-019-1887-z

Abstract: wastewater (HMVW) is commonly produced during the vanadium extraction process from vanadium titano-magnetite

Keywords: high-manganese containing vanadium wastewater     solvent extraction     carbonate precipitation     vanadium titano-magnetite    

Catalytic oxidation of CO over Pt/Fe

Zihao Li, Yang Geng, Lei Ma, Xiaoyin Chen, Junhua Li, Huazhen Chang, Johannes W. Schwank

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 4, doi: 10.1007/s11783-020-1244-y

Abstract: Abstract • Strong metal-support interaction exists on Pt/Fe3O4 catalysts. • Pt metal particles facilitate the formation of oxygen vacancies on Fe3O4. • Fe3O4 supports enhance the strength of CO adsorption on Pt metal particles. The self-inhibition behavior due to CO poisoning on Pt metal particles strongly impairs the performance of CO oxidation. It is an effective method to use reducible metal oxides for supporting Pt metal particles to avoid self-inhibition and to improve catalytic performance. In this work, we used in situ reductions of chloroplatinic acid on commercial Fe3O4 powder to prepare heterogeneous-structured Pt/Fe3O4 catalysts in the solution of ethylene glycol. The heterogeneous Pt/Fe3O4 catalysts achieved a better catalytic performance of CO oxidation compared with the Fe3O4 powder. The temperatures of 50% and 90% CO conversion were achieved above 260°C and 290°C at Pt/Fe3O4, respectively. However, they are accomplished on Fe3O4 at temperatures higher than 310°C. XRD, XPS, and H2-TPR results confirmed that the metallic Pt atoms have a strong synergistic interaction with the Fe3O4 supports. TGA results and transient DRIFTS results proved that the Pt metal particles facilitate the release of lattice oxygen and the formation of oxygen vacancies on Fe3O4. The combined results of O2-TPD and DRIFTS indicated that the activation step of oxygen molecules at surface oxygen vacancies could potentially be the rate-determining step of the catalytic CO oxidation at Pt/Fe3O4 catalysts. The reaction pathway involves a Pt-assisted Mars-van Krevelen (MvK) mechanism.

Keywords: Strong metal-support interaction (SMSI)     Surface oxygen vacancy     Lattice oxygen     Magnetite     Platinum metals    

Title Author Date Type Operation

Adsorption of phosphate on magnetite-enriched particles (MEP) separated from the mill scale

Muhammad Kashif Shahid, Yunjung Kim, Young-Gyun Choi

Journal Article

Nanosized magnetite in low cost materials for remediation of water polluted with toxic metals, azo- and

María Fernanda HORST,Verónica LASSALLE,María Luján FERREIRA

Journal Article

Sorption mechanisms of diphenylarsinic acid on natural magnetite and siderite: Evidence from sorption

Journal Article

Development of a magnetite-gene complex for gene transfection

Jian XIN BM, Ze-Feng XIA MD, Kai-Xiong TAO MD, Kai-Lin CAI PhD, Gao-Xiong HAN MD, Xiao-Ming SHUAI MD, Ji-Liang WANG MD, Han-Song DU MD, Guo-Bin WANG PhD, Yan LUO MM,

Journal Article

A magnetic adsorbent based on salicylic acid-immobilized magnetite nano-particles for pre-concentration

Hossein Abdolmohammad-Zadeh, Arezu Salimi

Journal Article

Coextraction of vanadium and manganese from high-manganese containing vanadium wastewater by a solvent extraction-precipitation process

Zishuai Liu, Yimin Zhang, Zilin Dai, Jing Huang, Cong Liu

Journal Article

Catalytic oxidation of CO over Pt/Fe

Zihao Li, Yang Geng, Lei Ma, Xiaoyin Chen, Junhua Li, Huazhen Chang, Johannes W. Schwank

Journal Article