Magnetic Separation Module for Quantifying Small Microplastics
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Solution Overview
Problem
Current methods for separating and quantifying microplastics in aqueous matrices are inefficient, particularly for small microplastics, and are hindered by the presence of non-plastic organic particles, leading to interference and high costs.
Innovation Solution
A magnetic separation module that automatically separates microplastics from aqueous matrices using magnetic iron particles, forming aggregates with microplastics and non-plastic organic particles, followed by a system for selective oxidation of organic particles, allowing for rapid and cost-effective quantification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional separation methods (filtration, sedimentation) are used to separate microplastics from aqueous matrices, then the separation process can be performed, but the methods are inefficient particularly for small microplastics and require multiple complex steps
Solution Approach 1:
The patent replaces conventional mechanical separation methods (filtration, sedimentation) with a magnetic field-based separation system. Magnetic iron particles are added to the aqueous matrix, allowing microplastics to be captured through magnetic interaction rather than mechanical filtration, significantly improving separation efficiency especially for small microplastics while simplifying the overall process
Solution Approach 2:
The patent introduces magnetic iron particles as an intermediary substance that mediates the separation process. These particles interact with microplastics in the aqueous matrix, enabling magnetic separation to occur. The magnetic particles serve as a bridge between the microplastics and the magnetic field, allowing efficient capture and separation without complex mechanical systems
2Productivity
If magnetic separation is used to separate microplastics, then separation speed and efficiency improve, but non-plastic organic particles also interact with magnetic material causing interference in quantification
Solution Approach 1:
The patent extracts and removes non-plastic organic particles from the separated microplastic sample through selective oxidation treatment. This step eliminates the interference caused by organic particles that co-interacted with magnetic material during separation, thereby restoring measurement precision and quantification accuracy while preserving the benefits of rapid magnetic separation
Solution Approach 2:
The patent employs selective oxidation to change the chemical state of non-plastic organic particles, transforming them into removable forms. By altering the chemical parameters of the organic particles through oxidation, the system can differentiate and remove them from the microplastic fraction, resolving the interference issue while maintaining separation efficiency
3Measurement precision
If multiple separation and purification steps are performed to eliminate interference from non-plastic particles, then quantification accuracy improves, but the time required and cost increase significantly
Solution Approach 1:
The patent merges the separation and purification functions into a single integrated magnetic separation process. By combining microplastic capture and organic particle removal into one magnetic separation step followed by selective oxidation, the system achieves both separation efficiency and quantification accuracy without requiring multiple sequential steps, thereby reducing analysis time and cost
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 module effectively separates microplastics from various aqueous matrices, reducing interference from organic particles and enabling efficient quantification with reduced time and cost.
Implementation Method 1
separating microplastics from said aqueous matrix by a magnetic interaction of microplastics with particles of a magnetic material, preferably magnetic iron material
Implementation Method 2
a microwave reactor module to selectively oxidize the non-plastic organic particles
Implementation Method 3
microwave reactor module to selectively oxidize the non-plastic organic particles
Data Source
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AI summary
The present invention relates to a magnetic separation module which automatically allows the magnetic separation of microplastics from an aqueous matrix after the interaction thereof with magnetic material particles, preferably magnetic iron material particles, wherein the aqueous matrix comprises, in addition to the microplastics, non-plastic organic particles and, optionally, inorganic particles. The invention also relates to a system comprising, among other elements, the magnetic separation module, and wherein the system allows the semiautomatic or automatic determination of different parameters for the quantification of microplastics contained in the aqueous matrix.