Multipure’s Solid Carbon Block filters utilize multiple filtration actions, combining mechanical filtration, electrokinetic adsorption, and physiochemical adsorption to provide the most effective contaminant reduction possible.

When water streams into and through a Multipure carbon block filter, contaminants initially undergo electrokinetic adsorption as the water passes the outer prefilter. The prefilter develops a positive molecular charge due to the passage of the water, which allows it to attract the negative ions of certain contaminants; this, in turn, causes these contaminants to adhere to the prefilter surface – much like a magnet attracting iron filings – removing them from the resultant water stream.

Next, the water passes through the densely compacted carbon block filter, where direct mechanical interception of particles as small as 0.5 micron occurs. Larger particulate matter – despite being almost invisible to the naked eye (the average human hair is 50 microns in diameter) – becomes trapped within the pores of the carbon block, eliminating all but the tiniest of contaminants from the water stream.

Diagram of activated carbon: mechanical filtration and surface adsorption of particles.

The nature of Multipure’s densely-compacted carbon block means that the water that passes through it makes contact with a large surface area of activated carbon, and for a relatively long amount of time. Because of this, the carbon block is ideally suited for physiochemical adsorption to take place. Within the water stream, the contaminant particles experience an attractive force with the activated carbon that comprises the carbon block, either through Van der Waals forces or as a result of chemical bonds. Because of this, the remaining contaminant particles that have not been electrokinetically adsorbed by the prefilter or mechanically trapped by the carbon block pores are finally adsorbed to the surface of the filter media itself. This includes contaminants such as pesticides, herbicides, and certain heavy metals.

Furthermore, Multipure’s proprietary formulation for Aqualuxe and Aquaperform filters include a specially-developed arsenic-adsorptive media that is blended with the carbon, allowing for the adsorptive reduction of Arsenic V. And Multipure’s Aqualuxe filter also possesses PureBlock technology, an additional proprietary filtration layer that allows for 6-factor (99.9999%) reduction of bacteria and 4-factor (99.99%) reduction of viruses in the water stream.

The ultimate result of Multipure’s carbon block technology and design is an array of the most advanced water treatment filters and devices available, offering performance and efficiency that cannot be achieved with other filtration technologies. And that right there is a major factor in what sets Multipure apart from other drinking water filters and devices.