Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Colors and Magnetism03:02

Colors and Magnetism

12.1K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
12.1K
Extraction: Advanced Methods00:56

Extraction: Advanced Methods

1.3K
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
1.3K
Microbes and Other Elemental Cycles01:24

Microbes and Other Elemental Cycles

89
Microbial activity plays a pivotal role in the biogeochemical cycling of iron and manganese, especially at the redox gradients characteristic of stratified aquatic environments. These cycles are driven by microbial transformations between oxidized and reduced forms of the metals, allowing organisms to exploit them for metabolic energy and structural purposes.Iron Cycling Across Redox GradientsIn neutral, oxygen-rich surface waters, iron is predominantly found in its oxidized, insoluble ferric...
89

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Pulsed-Laser Ablation for the Synthesis of High-Entropy Alloy Aerogels Toward H<sub>2</sub>O<sub>2</sub> Production and Water Decolorization.

Angewandte Chemie (International ed. in English)·2026
Same author

Recovery of rare earth elements by peptide-induced lanthanide ion precipitation.

Bioresource technology·2026
Same author

XAFS and DFT Insights into the Kinetics and Mechanisms of Technetium Reduction by Nanoparticulate Magnetite.

Environmental science & technology·2026
Same author

Machine-Learning-Enhanced Printed Vertical Magnetoresistive Sensors for Transparent, Flexible, Multimodal Interactive Magnetoelectronics.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)·2026
Same author

High-Entropy Alloy Aerogels with High-Density Solid-Solid Heterointerfaces for Alkaline Hydrogen Evolution.

Journal of the American Chemical Society·2026
Same author

Incorporation of Trivalent Lanthanide (Ln) in Powellite by Ca<sub>1-</sub><i><sub>x</sub></i>Na<sub>0.5<i>x</i></sub>Ln<sub>0.5<i>x</i></sub>MoO<sub>4</sub> Solid Solution Formation.

Inorganic chemistry·2026

Related Experiment Video

Updated: May 1, 2026

Synthesis of Cationized Magnetoferritin for Ultra-fast Magnetization of Cells
10:23

Synthesis of Cationized Magnetoferritin for Ultra-fast Magnetization of Cells

Published on: December 13, 2016

11.3K

Selenium(IV) uptake by maghemite (γ-Fe2O3).

Norbert Jordan1, Aline Ritter, Andreas C Scheinost

  • 1Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf e.V. , 01328 Dresden, Germany.

Environmental Science & Technology
|January 16, 2014
PubMed
Summary
This summary is machine-generated.

Maghemite nanoparticles effectively remove selenium(IV) by forming inner-sphere surface complexes. This interaction, studied at molecular and macroscopic levels, shows maghemite

More Related Videos

Synthesis of Functionalized Magnetic Nanoparticles, Their Conjugation with the Siderophore Feroxamine and its Evaluation for Bacteria Detection
15:03

Synthesis of Functionalized Magnetic Nanoparticles, Their Conjugation with the Siderophore Feroxamine and its Evaluation for Bacteria Detection

Published on: June 16, 2020

9.2K
Using Magnetometry to Monitor Cellular Incorporation and Subsequent Biodegradation of Chemically Synthetized Iron Oxide Nanoparticles
08:13

Using Magnetometry to Monitor Cellular Incorporation and Subsequent Biodegradation of Chemically Synthetized Iron Oxide Nanoparticles

Published on: February 27, 2021

4.2K

Related Experiment Videos

Last Updated: May 1, 2026

Synthesis of Cationized Magnetoferritin for Ultra-fast Magnetization of Cells
10:23

Synthesis of Cationized Magnetoferritin for Ultra-fast Magnetization of Cells

Published on: December 13, 2016

11.3K
Synthesis of Functionalized Magnetic Nanoparticles, Their Conjugation with the Siderophore Feroxamine and its Evaluation for Bacteria Detection
15:03

Synthesis of Functionalized Magnetic Nanoparticles, Their Conjugation with the Siderophore Feroxamine and its Evaluation for Bacteria Detection

Published on: June 16, 2020

9.2K
Using Magnetometry to Monitor Cellular Incorporation and Subsequent Biodegradation of Chemically Synthetized Iron Oxide Nanoparticles
08:13

Using Magnetometry to Monitor Cellular Incorporation and Subsequent Biodegradation of Chemically Synthetized Iron Oxide Nanoparticles

Published on: February 27, 2021

4.2K

Area of Science:

  • Environmental Science
  • Geochemistry
  • Materials Science

Background:

  • Selenium(IV) is a contaminant in water.
  • Maghemite is a magnetic iron oxide with potential for water treatment.

Purpose of the Study:

  • Investigate selenium(IV) uptake mechanisms by maghemite.
  • Characterize the formed surface complexes.
  • Evaluate maghemite's potential for Se-polluted water treatment.

Main Methods:

  • Batch adsorption experiments.
  • Electrophoretic mobility measurements.
  • X-ray Absorption Fine-Structure Spectroscopy (EXAFS).

Main Results:

  • Fast adsorption kinetics of selenium(IV) by maghemite.
  • Sorption decreases with increasing pH.
  • Formation of bidentate binuclear corner-sharing and bidentate mononuclear edge-sharing inner-sphere surface complexes confirmed by EXAFS.
  • Maghemite's isoelectric point shifts upon selenium(IV) uptake, indicating inner-sphere complexation.

Conclusions:

  • Maghemite effectively removes selenium(IV) through inner-sphere surface complexation.
  • Spectroscopic data provides insights for reactive transport models.
  • Maghemite is a promising sorbent for treating selenium-contaminated waters due to its stability and magnetic properties.