Underground Mercury Injection Using Acid-Soluble Waste Conversion
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Solution Overview
Problem
Existing methods for disposing of mercury-bearing waste, such as above-ground storage, face challenges including contamination risks, high maintenance costs, and potential leaching, necessitating a more stable and efficient disposal solution.
Innovation Solution
The method involves forming a mercury solution by reacting mercury-bearing waste with acids to make it water-soluble, then injecting it into underground disposal wells, which are sealed to prevent migration and minimize environmental impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mercury-bearing waste is stored above ground in stabilization facilities, then mercury can be stored and monitored, but contamination risks and leaching occur requiring constant monitoring and maintenance
Solution Approach 1:
The patent transitions from above-ground storage to underground injection into formation formations, moving the storage dimension from surface level to subsurface geological formations. This dimensional change isolates mercury waste from surface environmental factors while utilizing existing geological structures for containment.
Solution Approach 2:
The patent introduces an intermediary substance (acid) that reacts with mercury-bearing waste to form water-soluble mercury compounds. This chemical intermediary enables the mercury to be injected into underground formations while maintaining solubility and preventing precipitation, thus facilitating safe subsurface storage.
2Quantity of substance
If above ground storage facilities are used for mercury waste, then storage capacity is provided, but land requirements and construction costs are extensive
Solution Approach 1:
The patent moves storage from the two-dimensional surface level to the three-dimensional subsurface geological formations, utilizing the vertical dimension and underground space. This eliminates the need for extensive surface area while providing substantial storage capacity within the earth's crust.
3Quantity of substance
If above ground storage facilities are used for mercury waste, then storage is possible, but utilities and labor for monitoring and maintenance are extensive
Solution Approach 1:
The patent extracts the mercury waste from the surface environment and places it into underground formations, removing the need for surface-based monitoring infrastructure. By taking out the waste from the conventional storage paradigm, the complex monitoring and maintenance systems required for above-ground facilities are eliminated.
4Ease of operation
If mercury is reacted with acid to form water-soluble solution, then mercury becomes injectable into underground wells, but acid handling and reaction safety risks increase
Solution Approach 1:
The patent uses acid as an intermediary substance that facilitates the transformation of mercury-bearing waste into water-soluble forms suitable for injection. The acid serves as a chemical mediator that enables the desired solubility change while the resulting soluble mercury compounds can be safely injected into underground formations.
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 approach allows for safe, long-term storage of mercury waste with reduced land and utility requirements, eliminating contamination risks and lowering maintenance costs while ensuring mercury remains isolated from the biosphere.
Implementation Method 1
reacting mercury-bearing waste with acids to make it water-soluble
Implementation Method 2
The wellhead allows for controlled injection of the mercury solution into the subterranean formation through the wellbore and prevents the mercury solution from being re-produced from the subterranean formation once injected
Data Source
AI summary
A method may include pumping a mercury solution into a disposal well. A system may include a source of aqueous mercury solution, a pump, and a wellhead, wherein the source of aqueous mercury solution is fluidically coupled to the pump and the pump is fluidically coupled to the wellhead.