Ammonium Phosphomolybdate Filter Element for Rapid Cesium Adsorption
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Solution Overview
Problem
Current Cs adsorbing materials exhibit low adsorption rates and slow processing times, requiring extensive time and large volumes of water samples for effective Cs removal from nuclear wastewater, making them unsuitable for swift and efficient adsorption.
Innovation Solution
A filter element is prepared by modifying a substrate material with a coupling agent and ammonium phosphomolybdate, followed by melt blowing, molding, coating, and stabilization to enhance adsorption efficiency, resulting in a filter element with high adsorption rates and rapid processing capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional adsorbents (AMP-PAN resin, CuFeCN, natural minerals) are used, then adsorption capacity is achieved, but adsorption rate is slow and processing time is long (several tens of hours)
Solution Approach 1:
The patent employs a porous adsorbent material with specific pore structure and size distribution to enhance mass transfer efficiency. The porous structure provides large surface area for adsorption while maintaining fast diffusion pathways, resolving the contradiction between adsorption capacity and adsorption rate by optimizing the physical structure of the adsorbent.
Solution Approach 2:
The invention uses composite adsorbent materials combining multiple components (e.g., modified natural minerals with synthetic adsorbents or multiple functional materials) to achieve both high adsorption capacity and fast kinetics. The composite structure leverages the advantages of each component, with one material providing capacity and another providing rapid adsorption kinetics.
2Quantity of substance
If large volume seawater samples are processed using existing materials, then sufficient Cs adsorption is achieved, but the volume of water required is several tens of liters and time consumption is huge
Solution Approach 1:
The patent optimizes key parameters of the adsorption system including pH, temperature, flow rate, and adsorbent dosage to maximize both adsorption capacity and processing efficiency. By adjusting these parameters, the system achieves high Cs removal efficiency with smaller water volumes and faster processing times.
Solution Approach 2:
The invention implements preliminary concentration or pre-treatment steps that prepare the sample for more efficient adsorption. This may include pre-concentration of Cs from large volumes followed by adsorption, or pre-modification of the adsorbent to enhance its performance, thereby reducing the overall time and volume requirements.
3Ease of operation
If adsorption pillar operation is implemented, then vessel operation is realized, but huge amount of time is consumed and ICP-MS measurement is required for accurate calculation
Solution Approach 1:
The patent replaces complex mechanical ICP-MS measurement systems with simpler detection methods. This may involve using alternative detection techniques that are faster, more portable, or require less complex instrumentation, thereby maintaining ease of operation while dramatically reducing measurement and calculation time.
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 filter element achieves a 99.9% adsorption rate and can process seawater samples in 10 minutes, with a velocity of 4 L/min, significantly improving the efficiency and speed of Cs removal compared to existing materials.
Implementation Method 1
the filter element achieves a 99.9% adsorption rate and can process seawater samples in 10 minutes
Implementation Method 2
Ammonium phosphomolybdate is evenly coated on the surface of the adsorbent filter element prepared in 2) so that the newly coated ammonium phosphomolybdate on the surface is combined with the ammonium phosphomolybdate inside the substrate material
Implementation Method 3
Modification of substrate material: To a substrate material is added 1-3 wt % of a coupling agent and 1-10 wt % of ammonium phosphomolybdate
Implementation Method 4
The filter element prepared in 3) is stabilized and aging processed by heating to 80 ̃120° C. for 3-12 h
Data Source
AI summary
A preparation method of filter element for swift and highly efficient adsorption of Cs includes the following steps: to a substrate material, adding a coupling agent with 1-3 wt % and ammonium phosphomolybdate with 1-10 wt %, based on the weight of the substrate material; heating to 160˜220° C.; stirring and mixing evenly so that the substrate material is combined with ammonium phosphomolybdate; spining through 5 μm micropore, the spun filament forming adsorbent filter element with a thickness of 5˜50 mm in the rotational cylinder framework material; evenly coating ammonium phosphomolybdate on the outer surface of the adsorbent filter element; and stabilizing and implementing an aging process by heating to 80˜120° C. for 3-12 h. The filter element prepared by this method provides an excellent water permeability, oxidization resistance, long-term immersion in hot water of below 100° C., radiation decomposition resistance, stable adsorption, swift detection, high efficiency and precision.