Related Experiment Video
Updated: Sep 3, 2025
05:29
Self-standing Electrochemical Set-up to Enrich Anode-respiring Bacteria On-site
Published on: July 24, 2018
7.7K
Anode electrolysis of sulfides.
Jiakang Qu1, Xiang Chen1, Hongwei Xie1
1Key Laboratory for Ecological Metallurgy of Multimetallic Mineral of Ministry of Education, School of Metallurgy, Northeastern University, Shenyang 110819, P. R. China.
Summary
This study introduces an anode electrolysis method for sulfide metallurgy, converting sulfides into metal ions and sulfur gas. This sustainable approach offers high efficiency and reduced energy consumption for metal extraction.
Area of Science:
- Electrochemistry
- Materials Science
- Metallurgy
Background:
- Traditional sulfide metallurgy generates harmful sulfur dioxide and is energy-intensive.
- Existing methods face environmental and efficiency challenges.
Purpose of the Study:
- To develop a novel electrochemical method for sulfide metallurgy.
- To enable sustainable and energy-efficient extraction of metals from sulfide ores.
Main Methods:
- Anode electrolysis in molten salt was employed to electrochemically split sulfides.
- A graphite inert anode was used for sulfur gas evolution, while metal ions were deposited at the cathode.
Main Results:
- Copper(I) sulfide (Cu2S) was converted to sulfur gas and copper (Cu) with 99% current efficiency in molten LiCl-KCl at 500°C.
- Energy consumption was recorded at 0.420 kWh/kg-Cu.
- The method successfully extracted metals like Fe, Ni, Pb, and Sb from various sulfide compounds.
Conclusions:
- The developed anode electrolysis is a general electrochemical method for sulfide metallurgy.
- This approach offers a cleaner and more energy-efficient alternative to traditional methods.
- The continuous "sulfide-to-metal ion and sulfur gas" conversion is key to the process's efficacy.
More Related Videos
Related Concept Videos
01:08Electrodeposition
704
Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
Electrodeposition can...
704
02:26Preparation and Reactions of Sulfides
5.1K
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.
5.1K
03:00Electrolysis
27.3K
In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are transferred through an external circuit. Alternatively, an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction in a process known as electrolysis. For instance, recharging a battery involves the use of an external power source to drive the spontaneous (discharge) cell reaction in...
27.3K
01:30Anoxygenic Photosynthesis
131
Anoxygenic photosynthesis is a phototrophic process that captures light energy to drive carbon fixation without producing molecular oxygen. Unlike oxygenic photosynthesis, which utilizes water as an electron donor and releases oxygen, anoxygenic phototrophs use alternative electron donors such as hydrogen sulfide (H₂S), elemental sulfur (S⁰), or thiosulfate (S₂O₃²⁻). This process is carried out by diverse groups of bacteria, including purple bacteria, green...
131
02:47Voltaic/Galvanic Cells
58.4K
Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
58.4K
03:45Formation of Complex Ions
23.9K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
23.9K