Textile Adsorbent Coating for PFAS Removal From Wastewater
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing adsorbents are inadequate for efficiently removing perfluorinated organic compounds from aqueous environments, posing a significant environmental and health risk due to their persistence and widespread contamination.
Innovation Solution
An adsorbent system utilizing a hydroxy-modified ammonium salt and alkoxy-modified melamine or polycarboxylic acid, thermally fixed on a textile carrier material, achieves high adsorption efficiency by impregnating the material and subjecting it to thermal treatment to bind perfluorinated organic compounds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional adsorbents are used, then the adsorbent structure is simple, but the adsorption efficiency for perfluorinated compounds is insufficient
Solution Approach 1:
The patent applies composite materials by combining hydroxy-modified ammonium salts with alkoxy-modified melamine or polycarboxylic acids on a textile carrier. This multi-component system creates synergistic effects that dramatically improve adsorption efficiency for perfluorinated compounds compared to single-material adsorbents, while the textile carrier provides structural simplicity.
Solution Approach 2:
The patent employs parameter changes by modifying the chemical structure of ammonium salts through hydroxyethylation and ethoxylation, and by selecting specific molar ratios (5:1 to 1:1, preferably 2:1) of ammonium salt to melamine/polycarboxylic acid. These parameter optimizations enhance the adsorption capacity while maintaining practical applicability.
2Productivity
If adsorbent components are applied in optimal ratios, then adsorption performance is maximized, but the manufacturing process becomes more complex
Solution Approach 1:
The patent applies preliminary action by pre-modifying ammonium salts with hydroxyethyl groups before application to the textile carrier. This pre-functionalization ensures optimal reactivity and binding capacity, achieving high adsorption rates (over 90%) while streamlining the overall manufacturing process through staged preparation.
Solution Approach 2:
The patent optimizes manufacturing by specifying precise molar ratios (5:1 to 1:1, preferably 2:1) of ammonium salt to melamine/polycarboxylic acid, and controlling thermal fixation parameters (100-180°C for 10-30 minutes). These parameter specifications balance manufacturing complexity with achieving maximum adsorption performance.
3Strength
If thermal fixation is applied, then the binding strength of adsorbent components is improved, but energy consumption increases
Solution Approach 1:
The patent optimizes thermal fixation parameters by specifying a temperature range of 100-180°C (preferably 120-160°C) and treatment duration of 10-30 minutes. These parameter settings achieve sufficient binding strength for high adsorption performance while minimizing energy consumption compared to higher temperature or longer duration treatments.
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 adsorbent achieves adsorption rates of over 90% for perfluorinated compounds like PFAs and PFSs from wastewater and groundwater, significantly improving conventional methods.
Implementation Method 1
an adsorbent for binding polyfluorinated organic compounds on a carrier material comprising a hydroxy-modified ammonium salt
Implementation Method 2
After drying, the substrate thus impregnated is subjected to a thermal treatment to fix the coating. For this purpose, the treated substrate is heated to a temperature of 100 to 180°C, preferably 120 to 160°C, for a period of 10 to 30 minutes.
Data Source
AI summary
The invention relates to an adsorbent for binding per- and polyfluorinated organic compounds on a textile carrier material having a finish of a hydroxy-modified ammonium salt, characterized in that the carrier material is further finished with an alkoxy-modified melamine or a polycarboxylic acid, wherein the finish is thermally fixed. The invention further relates to the use of this adsorbent for binding per- and polyfluorinated organic compounds from aqueous media, in particular wastewater.