Treated Carbon for PFAS Removal via Chemical Modification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing water and air purification technologies face inefficiencies and environmental sustainability issues when removing contaminants like PFAS, as they often require replacement of ion exchange resin or carbon beds and disposal in landfills.
Innovation Solution
A method of treating carbon by contacting it with a hydroxide and/or peroxide, along with cations such as Ca2+, Mg2+, Zn2+, Sr2+, Al3+, B3+, and Fe3+, to enhance its contaminant removal capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing ion exchange resin or carbon bed technologies are used for contaminant removal, then contaminants can be trapped and removed from water, but the bed requires replacement and disposal to landfill, creating environmental sustainability issues and increased operational costs
Solution Approach 1:
The patent applies parameter changes by treating carbon with hydroxide and peroxide solutions to modify its chemical properties. This treatment changes the surface chemistry and pore structure of the carbon, enabling it to achieve superior contaminant removal performance that extends service life and eliminates landfill disposal, directly addressing the contradiction between removal effectiveness and substance loss.
2Productivity
If existing carbon bed technologies are used for contaminant removal, then contaminants can be captured, but the technology lacks improved efficiency and requires frequent bed replacement
Solution Approach 1:
The patent modifies the chemical parameters of carbon through hydroxide and peroxide treatment, creating a material with enhanced adsorption capacity and extended service life. This parameter change enables the carbon to maintain high productivity over longer periods, reducing replacement frequency while improving overall removal efficiency.
Solution Approach 2:
The treated carbon represents a composite material approach, combining carbon with modified surface properties from hydroxide and peroxide treatment. This creates a material that integrates the advantages of both the base carbon structure and the treatment-induced surface modifications, achieving superior and sustained contaminant removal performance.
3Reliability
If traditional water purification technologies are used, then basic contaminant removal can be achieved, but environmental sustainability is compromised due to landfill disposal requirements
Solution Approach 1:
The patent changes the performance parameters of carbon through chemical treatment, enabling it to achieve such superior contaminant removal effectiveness that the service life is extended indefinitely, eliminating the need for landfill disposal and thereby removing the environmental harm associated with traditional purification technology replacement cycles.
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 treated carbon exhibits improved capacity for contaminant removal, particularly for PFAS, with enhanced adsorption kinetics and capacity, potentially increasing the effectiveness of water and air purification processes.
Implementation Method 1
contacting carbon with (a) a hydroxide and/or peroxide
Implementation Method 2
contacting carbon with (a) a hydroxide and/or peroxide, and (b) one or more cations
Implementation Method 3
contacting carbon with (a) a hydroxide and/or peroxide, and (b) one or more cations selected from Ca2+, Mg2+, Zn2+, Sr2+, Al3+, B3+, and Fe3+
Data Source
AI summary
The present invention relates to methods of treating carbon to improve its ability to capture and retain contaminants, and also relates to treated carbon produced by such methods. Treatment of the carbon includes contacting the carbon with (a) a hydroxide and/or a peroxide, and (b) one or more cations selected from Ca2+, Mg2+, Zn2+, Sr2+, Al3+, B3+, and Fe3+.