Encapsulated Reactants for Controlled Oxidant Release
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Solution Overview
Problem
Current methods for remediation of hazardous organic compounds in soil, groundwater, and surface water are inefficient, costly, and often require large quantities of oxidizing agents like permanganate, which can lead to clogging and incomplete treatment due to rapid dissociation and precipitation issues.
Innovation Solution
Encapsulated reactants that do not require electro-osmosis or heat, using oxidants, catalysts, and chelants with controlled release mechanisms to target and break down contaminants, ensuring persistence and reactivity in the contaminated zone without clogging or precipitation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If large quantities of permanganate are used for remediation, then the oxidation capacity increases, but clogging and precipitation issues occur reducing treatment effectiveness
Solution Approach 1:
The oxidant is divided into multiple encapsulated particles, each containing a controlled amount of permanganate. This segmentation allows the oxidant to be delivered in manageable doses that prevent clogging while maintaining sufficient oxidation capacity across the contaminated zone.
Solution Approach 2:
The permanganate is pre-encapsulated in particles with controlled dissolution rates before application. This preliminary encapsulation prevents premature precipitation and clogging, allowing the oxidant to remain stable during transport and only activate when needed at the contamination site.
2Speed
If oxidizing agents are applied rapidly, then the initial treatment speed increases, but persistence in the treatment zone decreases due to rapid dissociation
Solution Approach 1:
The encapsulated particles release oxidant in periodic bursts as they dissolve, providing both rapid initial treatment when particles first contact contaminants and sustained persistence as particles continue to dissolve over time. This periodic release maintains effective oxidant concentrations throughout the treatment zone.
Solution Approach 2:
The dissolution rate parameter of the encapsulated particles is carefully controlled to match the consumption rate of the oxidant by contaminants. This parameter optimization ensures that oxidant is released fast enough to treat contaminants effectively but slowly enough to maintain persistence in the treatment zone.
3Reliability
If encapsulated reactants are used with controlled release mechanisms, then persistence and reactivity improve, but device complexity increases
Solution Approach 1:
The encapsulation uses flexible thin-film coatings that provide controlled release functionality without requiring complex mechanical structures. These films allow gradual dissolution and oxidant release while maintaining particle integrity, achieving persistent controlled release with minimal structural complexity.
Solution Approach 2:
The encapsulated particles are designed as disposable units with simple structures optimized for single-use in the treatment zone. Once the encapsulation dissolves and releases the oxidant, the particle completes its function and is naturally disposed of in the environment, avoiding the need for complex reusable or recoverable systems.
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
The encapsulated reactants effectively reduce hazardous organic compounds to innocuous materials, improving remediation efficiency and persistence in the treatment zone, reducing the need for excessive oxidant quantities and minimizing environmental disruption.
Implementation Method 1
Encapsulated reactants that do not require electro-osmosis or heat, using oxidants, catalysts, and chelants with controlled release mechanisms to target and break down contaminants
Implementation Method 2
using oxidants, catalysts, and chelants with controlled release mechanisms to target and break down contaminants
Implementation Method 3
The reactant particles are encapsulated with an encapsulant by procedures such as for example high temperature extrusion or molding
Implementation Method 4
The size and mass of the encapsulated reactant are adapted to allow the encapsulated reactant to float, suspend or sink within a subsurface of the earth
Data Source
AI summary
An encapsulated reactant(s) having at least one encapsulant and at least one reactant, and methods of making and using the encapsulated reactant(s), are is presently provided. An outermost encapsulant is substantially nonreacting, impermeable and nondissolving with water. The reactant(s) contribute to at least one reaction with contaminants in environmental media rendering the environmental media less harmful.