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

Heterogeneous Catalysis01:22

Heterogeneous Catalysis

41
Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...
41
Preparation and Reactions of Sulfides02:26

Preparation and Reactions of Sulfides

5.9K
Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.
5.9K
Predicting Reaction Outcomes02:24

Predicting Reaction Outcomes

11.2K
Kinetics describes the rate and path by which a reaction occurs. In contrast, thermodynamics deals with state functions and describes the properties, behavior, and components of a system. It is not concerned with the path taken by the process and cannot address the rate at which a reaction occurs. Although it does provide information about what can happen during a reaction process, it does not describe the detailed steps of what appears on an atomic or a molecular level. On the other hand,...
11.2K
Catalysis02:50

Catalysis

31.3K
The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
31.3K
Sulfur Assimilation01:20

Sulfur Assimilation

448
Sulfur is an essential element in biological systems, contributing to synthesizing key biomolecules, including amino acids such as cysteine and methionine, and cofactors such as coenzyme A and biotin. Microorganisms primarily assimilate sulfur as sulfate (SO₄²⁻) from the environment, which must undergo a series of biochemical transformations before it can be incorporated into cellular components. As sulfate is highly oxidized, it must undergo assimilatory sulfate reduction to...
448
Electrophilic Aromatic Substitution: Sulfonation of Benzene01:22

Electrophilic Aromatic Substitution: Sulfonation of Benzene

8.7K
Sulfonation of benzene is a reaction wherein benzene is treated with fuming sulfuric acid at room temperature to produce benzenesulfonic acid. Fuming sulfuric acid is a mixture of sulfur trioxide and concentrated sulfuric acid.
8.7K

You might also read

Related Articles

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

Sort by
Same author

Redox-driven mineral and organic associations in Jezero Crater, Mars.

Nature·2025
Same author

Fe-phosphates in Jezero Crater as evidence for an ancient habitable environment on Mars.

Nature communications·2025
Same author

Sulfites and sulfates formed by weathering of early martian carbonates in a sulfur dioxide-bearing atmosphere.

Scientific reports·2024
Same author

Aqueously altered igneous rocks sampled on the floor of Jezero crater, Mars.

Science (New York, N.Y.)·2022
Same author

An olivine cumulate outcrop on the floor of Jezero crater, Mars.

Science (New York, N.Y.)·2022
Same author

Fluvial Depositional Systems of the African Humid Period: An Analog for an Early, Wet Mars in the Eastern Sahara.

Journal of geophysical research. Planets·2022

Related Experiment Video

Updated: Mar 6, 2026

Preparation of Authigenic Pyrite from Methane-bearing Sediments for In Situ Sulfur Isotope Analysis Using SIMS
09:31

Preparation of Authigenic Pyrite from Methane-bearing Sediments for In Situ Sulfur Isotope Analysis Using SIMS

Published on: August 31, 2017

8.2K

Quantifying Fenton reaction pathways driven by self-generated H2O2 on pyrite surfaces.

C Gil-Lozano1, A F Davila2, E Losa-Adams1,3

  • 1Centro de Astrobiología (CSIC-INTA), 28850 Torrejón de Ardoz, Madrid, Spain.

Scientific Reports
|March 7, 2017
PubMed
Summary

Pyrite oxidation causes acid mine drainage and produces hydrogen peroxide (H2O2). Our study reveals pyrite acts as a Fenton reagent, influencing geochemical systems by mediating H2O2 reactions.

More Related Videos

[DPEPhosbcpCu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst
09:12

[DPEPhosbcpCu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst

Published on: May 21, 2019

9.9K
Synthetic Methodology for Asymmetric Ferrocene Derived Bio-conjugate Systems via Solid Phase Resin-based Methodology
07:07

Synthetic Methodology for Asymmetric Ferrocene Derived Bio-conjugate Systems via Solid Phase Resin-based Methodology

Published on: March 12, 2015

10.1K

Related Experiment Videos

Last Updated: Mar 6, 2026

Preparation of Authigenic Pyrite from Methane-bearing Sediments for In Situ Sulfur Isotope Analysis Using SIMS
09:31

Preparation of Authigenic Pyrite from Methane-bearing Sediments for In Situ Sulfur Isotope Analysis Using SIMS

Published on: August 31, 2017

8.2K
[DPEPhosbcpCu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst
09:12

[DPEPhosbcpCu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst

Published on: May 21, 2019

9.9K
Synthetic Methodology for Asymmetric Ferrocene Derived Bio-conjugate Systems via Solid Phase Resin-based Methodology
07:07

Synthetic Methodology for Asymmetric Ferrocene Derived Bio-conjugate Systems via Solid Phase Resin-based Methodology

Published on: March 12, 2015

10.1K

Area of Science:

  • Geochemistry
  • Environmental Science
  • Chemical Kinetics

Background:

  • Pyrite (FeS2) oxidation is a key process in Earth's iron and sulfur cycling.
  • This oxidation is the primary driver of acid mine drainage (AMD).
  • The kinetics of transient reactive oxygen species (ROS), like hydrogen peroxide (H2O2), remain poorly understood.

Purpose of the Study:

  • To investigate the kinetics of H2O2 formation during pyrite oxidation in aqueous suspensions.
  • To understand the role of FeS2 dissolution and Fenton reactions in H2O2 degradation.
  • To develop a kinetic model for H2O2 trends in geochemical systems.

Main Methods:

  • Real-time monitoring of H2O2 and dissolved O2 concentrations using amperometric microsensors.
  • Investigation under both oxic and anoxic conditions.
  • Spectroscopic and structural analyses to correlate FeS2 dissolution with H2O2 degradation via Fenton reactions.

Main Results:

  • Experimental data on H2O2 and O2 kinetics were collected.
  • FeS2 dissolution was linked to H2O2 degradation through Fenton chemistry.
  • A kinetic model was developed to explain observed H2O2 trends.

Conclusions:

  • Pyrite dissolution acts as a natural Fenton reagent.
  • This process influences the oxidation of other species in geochemical systems.
  • The Fenton-like activity of pyrite is significant even in oxygen-limited environments.