Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Extraction: Advanced Methods

Extraction: Advanced Methods

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...

Electrodeposition

Electrodeposition

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...

Qualitative Analysis

Qualitative Analysis

For solutions containing mixtures of different cations, the identity of each cation can be determined by qualitative analysis. This technique involves a series of selective precipitations with different chemical reagents, each reaction producing a characteristic precipitate for a specific group of cations. Metal ions within a group are further separated by varying the pH, heating the mixture to redissolve a precipitate, or adding other reagents to form complex ions.
For instance, group IV...

Precipitation of Ions

Precipitation of Ions

Predicting Precipitation
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:

Precipitation and Co-precipitation

Precipitation and Co-precipitation

Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...

Washing, Drying, and Ignition of Precipitates

Washing, Drying, and Ignition of Precipitates

After filtration, the precipitate is washed to remove coprecipitated impurities and any remaining mother liquor. Colloidal precipitates, such as silver chloride, are washed with an electrolyte (such as dilute nitric acid) to prevent the peptization of the precipitate. In the case of slightly soluble precipitates, the wash solution contains a common ion to reduce solubility. Lead sulfate, which is slightly soluble in water, is washed with dilute sulfuric acid. Similarly, wash solutions may be...

You might also read

Related Articles

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

Sort by

Same author

Electrochemical Electron Transfer: Key Concepts, Theories, and Parameterization via Atomistic Simulations.

Chemical reviews·2026

Same author

Solvent-Free Hydrogenation and Dehydrogenation of Quinoline and Quinaldine for the LOHC Concept.

ACS omega·2026

Same author

Potential-dependent polaron formation activates TiO<sub>2</sub> for the hydrogen evolution reaction.

Nature communications·2026

Same author

Poly(sarcosine) Lipid Synthesis From CO<sub>2</sub>-Based Sarcosine-N-Carboxyanhydride.

Macromolecular rapid communications·2026

Same author

Direct Air Capture: Recyclability and Exceptional CO<sub>2</sub> Uptake Using a Superbase.

Environmental science & technology·2025

Same author

Atomic Layer Deposition of AgX (X = Cl, Br, I) Thin Films.

ACS omega·2025

Search research articles

Related Experiment Video

Updated: Jun 26, 2025

Detection and Recovery of Palladium, Gold and Cobalt Metals from the Urban Mine Using Novel Sensors/Adsorbents Designated with Nanoscale Wagon-wheel-shaped Pores

Detection and Recovery of Palladium, Gold and Cobalt Metals from the Urban Mine Using Novel Sensors/Adsorbents Designated with Nanoscale Wagon-wheel-shaped Pores

Published on: December 6, 2015

Sequential Selective Dissolution of Coinage Metals in Recyclable Ionic Media.

Anže Zupanc¹, Joseph Install¹, Timo Weckman²

¹Department of Chemistry, Faculty of Science, University of Helsinki, A. I. Virtasen aukio 1, 00014, Helsinki, Finland.

Angewandte Chemie (International Ed. in English)

|May 14, 2024

Summary

This study introduces a novel method for recycling copper, silver, and gold from electronic waste using eco-friendly solvents and oxidants. The process allows for selective dissolution and recovery of each metal, promoting sustainable resource management.

Keywords:

copper gold noble metals recycling silver

More Related Videos

Sulfate Separation by Selective Crystallization with a Bis-iminoguanidinium Ligand

Sulfate Separation by Selective Crystallization with a Bis-iminoguanidinium Ligand

Published on: September 8, 2016

Quantification of Metal Leaching in Immobilized Metal Affinity Chromatography

Quantification of Metal Leaching in Immobilized Metal Affinity Chromatography

Published on: January 17, 2020

Related Experiment Videos

Last Updated: Jun 26, 2025

Detection and Recovery of Palladium, Gold and Cobalt Metals from the Urban Mine Using Novel Sensors/Adsorbents Designated with Nanoscale Wagon-wheel-shaped Pores

Detection and Recovery of Palladium, Gold and Cobalt Metals from the Urban Mine Using Novel Sensors/Adsorbents Designated with Nanoscale Wagon-wheel-shaped Pores

Published on: December 6, 2015

Sulfate Separation by Selective Crystallization with a Bis-iminoguanidinium Ligand

Sulfate Separation by Selective Crystallization with a Bis-iminoguanidinium Ligand

Published on: September 8, 2016

Quantification of Metal Leaching in Immobilized Metal Affinity Chromatography

Quantification of Metal Leaching in Immobilized Metal Affinity Chromatography

Published on: January 17, 2020

Area of Science:

Materials Science
Green Chemistry
Metallurgy

Background:

Coinage metals (copper, silver, gold) are vital for electronics.
Recycling these metals is crucial for supply security.
Current recycling methods need sustainable alternatives.

Purpose of the Study:

To develop a selective and sustainable method for sequential metal dissolution.
To utilize biomass-derived ionic solvents and green oxidants.
To enable efficient recovery and solvent reuse for multi-metal waste.

Main Methods:

Sequential dissolution of copper, silver, and gold using specific solvent/oxidant mixtures.
Utilized choline chloride/urea/H2O2 for copper, lactic acid/H2O2 for silver, and choline chloride/urea/Oxone for gold.
Employed analytical techniques and DFT calculations to study reactions and selectivity.

Main Results:

Selective dissolution of copper, followed by silver, and then gold was achieved.
Metals were quantitatively recovered from solutions.
Solvents were successfully recycled and reused.
Demonstrated applicability on electronic waste substrates like PCBs and solar panels.

Conclusions:

The developed approach offers a sustainable and efficient pathway for recycling coinage metals from electronic waste.
This method paves the way for contemporary multi-metal waste recycling.
Highlights the potential of ionic solvents and green oxidants in resource recovery.