Sol-Gel Composite Filter for Ionic Species Removal
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Solution Overview
Problem
Conventional bioretention systems for storm water runoff have limited long-term effectiveness in removing ionic species like nitrates, phosphates, and chlorides due to the limited treatment capacity of soil filter media.
Innovation Solution
A sol-gel composite material with a porous matrix and incorporated reactive metal is used to contact and remove ionic species from an aqueous phase, enhancing the treatment capacity of bioretention systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If conventional bioretention systems with soil filter media are used, then initial treatment of runoff is provided, but long-term effectiveness is limited due to limited treatment capacity
Solution Approach 1:
The invention uses composite materials combining soil filter media with sol-gel derived materials containing reactive metals (such as iron, aluminum, or manganese oxides/hydroxides). This composite structure provides both the physical filtration capabilities of soil and the enhanced ionic species removal capacity of sol-gel materials, thereby extending long-term treatment effectiveness while increasing overall treatment capacity.
Solution Approach 2:
The sol-gel derived materials possess highly porous structures with large surface areas that provide numerous active sites for adsorption and precipitation of ionic species. This porous structure allows the material to maintain high treatment capacity over extended periods by continuously capturing nutrients and contaminants from runoff passing through the bioretention system.
2Productivity
If soil filter media is used for filtration and adsorption, then initial removal of ionic species is achieved, but treatment capacity is limited
Solution Approach 1:
By creating composite materials that integrate soil filter media with sol-gel derived reactive metal materials, the system achieves both high treatment capacity (through the abundant active sites in sol-gel materials) and reliable long-term effectiveness (through the synergistic combination of physical filtration and chemical removal mechanisms).
Solution Approach 2:
The sol-gel process enables precise control over the chemical composition, surface area, and reactive metal content of the filter material. By adjusting parameters such as metal precursor concentration, pH, and curing conditions, the material can be optimized to provide enhanced treatment capacity while maintaining structural stability for reliable long-term performance.
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 sol-gel composite material effectively removes ionic species, such as nitrates, phosphates, and chlorides, improving the long-term effectiveness of bioretention systems by increasing their treatment capacity.
Implementation Method 1
contacting an aqueous phase containing the ionic species with a sol-gel composite material, where the sol-gel composite material is a sol-gel composition having a porous matrix and containing a reactive metal incorporated into at least a portion of the porous matrix, under conditions sufficient to remove the ionic species contained in the aqueous phase
Data Source
AI summary
Disclosed is a method for removing an ionic species contained in an aqueous phase. The method includes contacting an aqueous phase containing the ionic species with a sol-gel composite material, where the sol-gel composite material is a sol-gel composition having a porous matrix and containing a reactive metal incorporated into at least a portion of the porous matrix, under conditions sufficient to remove the ionic species contained in the aqueous phase.