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Related Concept Videos

Microbial Leaching01:27

Microbial Leaching

Microbial leaching, also known as bioleaching, is an environmentally favorable method for extracting metals from low-grade ores using specific microorganisms. This biotechnological approach is particularly valuable for mining operations targeting copper, gold, and uranium, where traditional extraction methods may be economically or environmentally impractical.Copper Leaching and Microbial CatalysisIn copper bioleaching, crushed ore is arranged into heaps and irrigated with a dilute sulfuric...
Oxidation of Alcohols02:37

Oxidation of Alcohols

In this lesson, the oxidation of alcohols is discussed in depth. The various reagents used for oxidation of primary and secondary alcohols are detailed, and their mechanism of action is provided.
The process of oxidation in a chemical reaction is observed in any of the three forms:
Oxidations of Aldehydes and Ketones to Carboxylic Acids01:15

Oxidations of Aldehydes and Ketones to Carboxylic Acids

Oxidation of aldehydes and ketones results in the formation of carboxylic acids. Aldehydes, bearing hydrogen next to the carbonyl group, are easily oxidized compared to ketones. This is because an aldehydic proton can easily be abstracted during oxidation.
Aldehydes readily undergo oxidation in strong oxidizing agents such as potassium permanganate and chromic acid. The oxidation can also be carried out using mild oxidizing agents such as silver oxide. In fact, aldehydes can be easily oxidized...
Radical Autoxidation01:20

Radical Autoxidation

The oxidation of an organic compound in the presence of air or oxygen is called autoxidation. For example, cumene reacts with oxygen to form hydroperoxide. Autoxidation involves initiation, propagation, and termination steps. Many organic compounds are susceptible to autoxidation—especially ethers in the presence of oxygen, which form hydroperoxides. Even though this reaction is slow, old ether bottles contain small amounts of peroxide, which leads to laboratory explosions during ether...
Electrodeposition01:08

Electrodeposition

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Electrodeposition can...
Oxidation-Reduction Reactions03:11

Oxidation-Reduction Reactions

Oxidation–Reduction Reactions

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Related Experiment Video

Updated: Jul 14, 2026

Simultaneous Multi-surface Anodizations and Stair-like Reverse Biases Detachment of Anodic Aluminum Oxides in Sulfuric and Oxalic Acid Electrolyte
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Simultaneous Multi-surface Anodizations and Stair-like Reverse Biases Detachment of Anodic Aluminum Oxides in Sulfuric and Oxalic Acid Electrolyte

Published on: October 5, 2017

Advanced Oxidation Processes for Precious Metal Recycling.

Anting Ding1, Wen Liu2, Zhenfeng Bian3

  • 1College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310058, China.

Accounts of Chemical Research
|July 13, 2026
PubMed
Summary

Recycling precious metals from electronic waste is crucial due to resource scarcity. This study introduces advanced oxidation processes for milder, more selective precious metal recovery, moving beyond harsh traditional methods.

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

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Last Updated: Jul 14, 2026

Simultaneous Multi-surface Anodizations and Stair-like Reverse Biases Detachment of Anodic Aluminum Oxides in Sulfuric and Oxalic Acid Electrolyte
10:27

Simultaneous Multi-surface Anodizations and Stair-like Reverse Biases Detachment of Anodic Aluminum Oxides in Sulfuric and Oxalic Acid Electrolyte

Published on: October 5, 2017

Detection and Recovery of Palladium, Gold and Cobalt Metals from the Urban Mine Using Novel Sensors/Adsorbents Designated with Nanoscale Wagon-wheel-shaped Pores
10:31

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

Area of Science:

  • Materials Science
  • Chemical Engineering
  • Environmental Science

Background:

  • Precious metals (Au, Ag, Pt, Pd, Rh) are vital but face supply risks due to scarcity and geopolitical factors.
  • Electronic waste and spent catalysts represent significant secondary resources, yet traditional recycling methods use harsh, toxic reagents like aqua regia and cyanidation.
  • Dissolving inert precious metals requires oxidation, a challenge addressed by developing milder, more selective advanced oxidation processes.

Purpose of the Study:

  • To present a novel approach to precious metal recycling using advanced oxidation processes (AOPs).
  • To explore various AOP platforms, including photocatalysis, piezocatalysis, Fenton-like systems, single-atom catalysis, and self-catalytic leaching.
  • To demonstrate how AOPs can enable greener, more selective, and versatile precious metal recovery from secondary resources.

Main Methods:

  • Photocatalytic and piezocatalytic systems utilizing light or mechanical energy to generate reactive species for metal dissolution.
  • Homogeneous persulfate-based Fenton-like systems for bulk solution oxidant activation via radical and nonradical pathways.
  • Single-atom catalysis for bridging molecular-level oxidant activation with heterogeneous robustness.
  • Self-catalytic leaching where the precious metal itself aids in generating oxidizing species.

Main Results:

  • Demonstrated the controlled oxidation of precious metals under substantially milder conditions compared to traditional hydrometallurgy.
  • Showcased the effectiveness of diverse AOP platforms in facilitating precious metal dissolution and recovery.
  • Achieved rapid and selective precious metal recovery with improved catalyst recyclability using single-atom catalysts.

Conclusions:

  • Advanced oxidation processes offer a paradigm shift for precious metal metallurgy, moving beyond harsh reagents.
  • The integration of oxidative power, ligand coordination, interfacial control, and sustainability is key for future recycling technologies.
  • This work lays the foundation for developing greener, more selective, and versatile precious metal recycling methods.