Ferro-cavitation Process for Metal Separation
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Solution Overview
Problem
Existing methods for heavy metal separation and recovery from liquid samples are inefficient and often require the addition of hydrogen peroxide, making them costly and environmentally impactful.
Innovation Solution
A process combining acoustic cavitation and Fenton oxidation, which generates hydroxyl radicals in situ without adding hydrogen peroxide, to facilitate the separation and recovery of target metals by producing metal salts or oxides with reduced solubility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If hydrogen peroxide is added to facilitate metal separation, then metal separation efficiency is improved, but operational costs increase and environmental impact worsens
Solution Approach 1:
The system uses acoustic cavitation to generate hydrogen peroxide in-situ from the liquid sample itself, eliminating the need for external hydrogen peroxide addition. The cavitation process converts water molecules into hydroxyl radicals that recombine to form hydrogen peroxide, which then participates in Fenton oxidation for metal separation.
Solution Approach 2:
Acoustic cavitation acts as an intermediary process that bridges the gap between water and hydrogen peroxide. The cavitation-generated hydroxyl radicals serve as intermediates that convert water into hydrogen peroxide, which then enables the Fenton oxidation reaction without requiring direct hydrogen peroxide addition.
2Productivity
If conventional Fenton oxidation is used with hydrogen peroxide addition, then metal separation is achieved, but process complexity and cost increase
Solution Approach 1:
The patent combines acoustic cavitation and Fenton oxidation into a single integrated process called ferro-cavitation. The cavitation-generated hydrogen peroxide directly feeds into the Fenton reaction with iron salts, merging two separate processes (cavitation and Fenton oxidation) into one unified system that reduces operational steps and complexity.
Solution Approach 2:
The system generates its own hydrogen peroxide requirement through acoustic cavitation, making the process self-sufficient. This eliminates the need for external hydrogen peroxide supply systems, storage, and handling infrastructure, thereby simplifying the overall process design and reducing device complexity.
3Loss of substance
If acoustic cavitation is used to generate hydrogen peroxide in-situ, then hydrogen peroxide addition is eliminated, but energy consumption increases
Solution Approach 1:
The patent converts the potentially harmful effect of acoustic cavitation (energy-intensive bubble formation and collapse) into a beneficial process by utilizing the cavitation-generated hydroxyl radicals to produce hydrogen peroxide in-situ. The energy input that would otherwise be considered a drawback is transformed into a useful chemical product that drives the metal separation process.
Solution Approach 2:
The system changes the physical-chemical parameters of the liquid sample through acoustic cavitation, transforming water into a hydrogen peroxide-rich environment. By adjusting cavitation parameters (frequency, power, duration), the process optimizes hydrogen peroxide generation efficiency, balancing energy input with chemical output.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This combined process enhances metal separation and recovery efficiency, reduces operational costs by avoiding hydrogen peroxide addition, and minimizes environmental impact.
Implementation Method 1
applying acoustic cavitation to the liquid sample to form vapor bubbles; wherein the acoustic cavitation causes thermolysis of the liquid sample to produce hydroxyl radicals
Implementation Method 2
the acoustic cavitation causes thermolysis of the liquid sample to produce hydroxyl radicals
Implementation Method 3
adding an iron (II) salt, or a precursor form thereof, to the liquid sample and allowing Fenton oxidation reaction to occur between the iron and the hydrogen peroxide generated by acoustic cavitation in-situ
Data Source
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AI summary
Provided herein are processes for the removal and/or recovery of a target metal from a liquid sample, said process comprising: [1] applying acoustic cavitation to the liquid; and [2] adding an iron (II) salt, or a precursor form thereof, to the liquid sample and allowing Fenton oxidation reaction to occur between the iron and hydrogen peroxide in the liquid, thereby producing hydroxyl radicals; thereby producing a target metal salt or metal oxide having a reduced solubility in the liquid sample, leading to removal of the target metal from the liquid sample. The use of metal ligands in such processes is also described, as well as systems for performing such processes. Methods, processes, and systems for removing organic contaminants from a liquid sample are also described.