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Filter Efficiency measures the performance of a filter by evaluating its ability to capture and retain particles from air or liquid. It is a critical parameter in assessing the suitability of filters for applications ranging from household air purifiers to industrial filtration systems.
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Filtration mechanisms substantially influence the separation process by allowing selective passage of materials through a barrier, effectively removing impurities or specific particles from a medium. Mastery of filter design and material properties is critical to optimizing filtration efficiency across various industrial and scientific applications.
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Pressure drop refers to the reduction in pressure as a fluid flows through a pipe or channel, caused by frictional forces and changes in flow area. It is a critical factor in designing efficient fluid systems, as excessive Pressure drop can lead to increased energy consumption and reduced system performance.
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High-Efficiency Particulate Air (HEPA) filters are designed to capture at least 99.97% of airborne particles 0.3 microns in diameter, which is the most challenging particle size to filter. To comply with this standard, HEPA filters must be rigorously tested for efficiency in accordance with standards such as those set by the Institute of Environmental Sciences and Technology (IEST) or European Standards (EN 1822).
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The Minimum Efficiency Reporting Value (MERV) rating measures the effectiveness of air filters in removing particles from the air. Higher MERV Ratings indicate better filtration performance, capturing a greater percentage of small particles, but may also reduce airflow if the HVAC system is not designed for higher resistance.
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Particle size distribution (PSD) is a critical parameter in fields such as materials science, pharmaceuticals, and environmental science, as it influences the physical and chemical properties of a material, including its reactivity, stability, and appearance. Accurate measurement and analysis of PSD are essential for optimizing product performance and process efficiency, as well as for ensuring compliance with industry standards and regulations.
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Aerosol science is the study of particles suspended in air or gas, which play crucial roles in atmospheric processes, climate change, and public health. Understanding the behavior, sources, and impacts of aerosols is essential for developing strategies to mitigate air pollution and its adverse effects.
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Nanofiltration is a membrane filtration process that selectively separates molecules based on size and charge, typically used for water purification and wastewater treatment. It operates between ultrafiltration and reverse osmosis in terms of pore size, effectively removing multivalent ions and small organic molecules while allowing monovalent ions to pass through.
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Porosity is a measure of the void spaces in a material and is a critical factor in determining the storage and movement of fluids in geological formations. It significantly influences the physical properties and behavior of materials, impacting fields like hydrogeology, petroleum engineering, and soil science.
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Fibrous filters are materials comprised of a mesh of randomly arranged fibers used to remove particles from air or liquids. They are widely employed in various applications including HVAC systems, industrial filtration, and respiratory protection due to their efficiency and versatility.
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