In-situ forming Sub-2 nm hydrous iron oxide particles in MOFs for deep-treatment and high anti-interference in arsenic removal

2021 ◽  
pp. 133813
Author(s):  
Tian Chen ◽  
Min Ji ◽  
Lili Wen ◽  
Taolian Guo ◽  
Siyuan Pan ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Arsenic Removal ◽  
Iron Oxide Particles ◽  
In Situ Forming ◽  
Hydrous Iron Oxide ◽  
Oxide Particles

scholarly journals Combined in Situ Zymography, Immunofluorescence, and Staining of Iron Oxide Particles in Paraffin-Embedded, Zinc-Fixed Tissue Sections

2012 ◽  
Vol 11 (5) ◽  
pp. 7290.2011.00055 ◽  
Author(s):  
Eyk Schellenberger ◽  
Akvile Haeckel ◽  
Lena Schoenzart ◽  
Franziska Appler ◽  
Joerg Schnorr ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Particles ◽  
Fixed Tissue ◽  
Tissue Sections ◽  
Oxide Particles ◽  
In Situ Zymography

scholarly journals Arsenic Adsorption by Some Iron Oxide Minerals: Influence of Interfacial Chemistry

2020 ◽  
Vol 20 (2) ◽  
pp. 43-48
Author(s):  
B. Koomson ◽  
E. K. Asiam
Keyword(s):  
Iron Oxide ◽  
Zeta Potential ◽  
Arsenic Removal ◽  
Emission Spectrometry ◽  
Interfacial Chemistry ◽  
Iron Oxide Particles ◽  
Arsenic Adsorption ◽  
Keywords Arsenic ◽  
Oxide Particles ◽  
Oxide Minerals

The dramatic increase in hydrometallurgical extraction of gold from arsenic bearing gold ores has inevitably resulted in the release of arsenic into the environment worldwide. Residual arsenic minerals in tailings storage facilities can be oxidised and mobilise arsenic into the environment. This can contaminate soils, ground and surface waters and eventually biota. In spite of well-established technologies and recent advances in arsenic remediation, there are limited knowledge and understanding of the iron oxide substrate (goethite, hematite and magnetite) mineralogy and the fate of arsenic on the surface charge of these iron oxide substrates in an aqueous media during adsorption. The aim of the present study was to investigate the influence of interfacial chemistry on arsenic adsorption onto selected iron oxide particles to assist in developing a better understanding and new knowledge in arsenic removal from contaminated waters. Bulk mineralogy and partial chemical composition of selected iron oxide minerals were obtained using quantitative x-ray diffractometry (QXRD) and acid digestion followed by metal determination using inductively coupled plasma optical emission spectrometry (ICP-OES) respectively. Zeta Potential measurements involving iron oxide particles as arsenic adsorbents were carried out to elucidate the influence of interfacial chemistry on the adsorption behavior of arsenic from solution. The study confirmed that the iron oxide minerals were predominantly hematite, magnetite and goethite with goethite containing significant amounts of quartz. Arsenic adsorption was pH dependent and strongly influenced the zeta potential and isoelectric point (IEP) of the iron oxide particles. The zeta potential of all substrates studied was strongly positive at pH 2 but indicated a reversal at pH ~ > 9. The interaction between substrates, arsenic and its hydrolysable products resulted in significant decrease in the magnitude of zeta potential and change in IEP indicating specific adsorption.   Keywords: Arsenic, Adsorption, Iron Oxide Minerals, Zeta Potential

scholarly journals In situ labeling of immune cells with iron oxide particles: An approach to detect organ rejection by cellular MRI

2006 ◽  
Vol 103 (6) ◽  
pp. 1852-1857 ◽  
Author(s):  
Y. L. Wu ◽  
Q. Ye ◽  
L. M. Foley ◽  
T. K. Hitchens ◽  
K. Sato ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Immune Cells ◽  
Iron Oxide Particles ◽  
Cellular Mri ◽  
Organ Rejection ◽  
Oxide Particles

scholarly journals In Situ Functionalization of Iron Oxide Particles with Alginate: A Promising Biosorbent for Retention of Metal Ions

Polymers ◽  
2021 ◽  
Vol 13 (20) ◽  
pp. 3554
Author(s):  
Alina-Roxana Lucaci ◽  
Dumitru Bulgariu ◽  
Laura Bulgariu
Keyword(s):  
Iron Oxide ◽  
Metal Ions ◽  
Complete Recovery ◽  
Iron Oxide Particles ◽  
Algae Biomass ◽  
Equilibrium Data ◽  
Pseudo Second Order ◽  
Oxide Particles ◽  
In Situ Functionalization

In this study, alginate extracted from marine algae biomass was used for the functionalization of iron oxide particles obtained in situ. This procedure ensured a complete recovery of the alginate from the aqueous solution obtained after extraction and allowed the preparation of a new biosorbent. The obtained iron oxide microparticles functionalized with alginate (Alg-Fe3O4-MPs) were analyzed (FTIR spectrometry, energy dispersive X-ray spectroscopy and scanning electron microscopy), and their biosorptive performance was tested for the removal of Cu(II), Co(II) and Zn(II) ions. The optimal conditions were established as pH = 5.4, adsorbent dosage of 2 g/L, contact time of minimum 60 min and room temperature (23 ± 1 °C). The retention of metal ions was quantitative (99% for Cu(II), 89% for Co(II) and 95% for Zn(II)) when the concentration of metal ions was less than 0.80 mmol M(II)/L. The Langmuir model was found to be the best fitted model for the equilibrium data, while biosorption kinetics followed the pseudo-second order model. Biosorption processes were spontaneous (ΔG0 < 0), endothermic (ΔH0 > 0), and accompanied by an increase in entropy (ΔS0 > 0). The high maximum biosorption capacity of Alg-Fe3O4-MPs and its good regeneration highlight the potential of this biosorbent for applications in decontamination processes.

Magnetic composite films based on alginate and nano-iron oxide particles obtained by synthesis “in situ”

2017 ◽  
Vol 94 ◽  
pp. 43-55 ◽  
Author(s):  
Gianina A. Kloster ◽  
Diego Muraca ◽  
Mirna A. Mosiewicki ◽  
Norma E. Marcovich
Keyword(s):  
Iron Oxide ◽  
Composite Films ◽  
Magnetic Composite ◽  
Iron Oxide Particles ◽  
Oxide Particles

scholarly journals Aqueous one-pot synthesis of well-defined zwitterionic diblock copolymers by RAFT polymerization: an efficient and environmentally-friendly route to a useful dispersant for aqueous pigments

2021 ◽  
Vol 23 (3) ◽  
pp. 1248-1258
Author(s):  
Shannon M. North ◽  
Steven P. Armes
Keyword(s):  
Iron Oxide ◽  
Diblock Copolymers ◽  
Raft Polymerization ◽  
Environmentally Friendly ◽  
Iron Oxide Particles ◽  
One Pot ◽  
One Pot Synthesis ◽  
Highly Effective ◽  
Oxide Particles

An atom-efficient, wholly aqueous one-pot synthesis of zwitterionic diblock copolymers has been devised. Such copolymers can serve as highly effective aqueous dispersants for nano-sized transparent yellow iron oxide particles.

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