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Comment PDF Separation Processes

An Up-Close Look at Electropositive Filtration

By Fred Tepper and Leo Kaledin, Argonide Corp. |

Electropositive filters take advantage of surface-charge effects to filter nanometer-sized particles. Provided here is an overview of how they work and where they can be used Electropositive filters take advantage of surface-charge effects to filter nanometer-sized particles. Provided here is an overview of how they work and where they can be used Effective water management is a major issue in a growing number of geographic regions, and the chemical process industries (CPI) are implementing strategies for water reuse at an increasing rate. Filtration is a key technology area for realizing water treatment objectives. Removing small particles in the sub-micron size range, such as naturally occurring and manufactured nanoparticles, sub-micron-sized colloidal particles, microorganisms and soluble organic materials, presents difficult challenges for filtration equipment. These small particles can be significant sources of fouling for membrane micro- and ultra-filtration in several applications, including desalination, water treatment for reuse, removal of contaminants from waste streams, filtration of dyes, pharmaceutical plant wastes and others. Modifying the surface charge of filter media offers a potentially useful and effective strategy…
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