Cleaner Purifier
 |
 Whirlpool Whispure 510 Air Purifier HEPA Air Cleaner $197.99 Time Remaining: 29d 6h 54m Buy It Now for only: $197.99 |
 GREEN AIR HP PURIFIER OZONE GENERATOR ALPINE CLEANER $159.95 Time Remaining: 1h 3m Buy It Now for only: $179.95 |
 NEW IONIC AIR PURIFIER PRO UV OZONE CLEANER ESP FILTER IONIZER REMOTE e81E $87.98 Time Remaining: 1h 4m Buy It Now for only: $127.99 |
 Kenmore Air Cleaner Purifier 85300 HEPA $99.99 Time Remaining: 29d 7h 13m Buy It Now for only: $99.99 |
 NEW IONIC FRIDGE AIR PURIFIER OZONE CLEANER REFRIGERATOR DEODORIZER $19.99 Time Remaining: 1h 33m |
 Commercial Ozone Generator Air Cleaner Purifier NEW $135.99 Time Remaining: 26d 22h 20m Buy It Now for only: $135.99 |
 NEW IONIC AIR PURIFIER PRO UV OZONE CLEANER ESP FILTER IONIZER REMOTE O81E $87.98 Time Remaining: 1h 34m Buy It Now for only: $127.99 |
 SHARPER IMAGE IONIC BREEZE PERSONAL AIR CLEANER PURIFIER HUMIDIFIER WHITE $24.50 Time Remaining: 1h 56m Buy It Now for only: $27.50 |
 Friedrich C 90B Electronic Air Cleaner Purifier $199.50 Time Remaining: 28d 18h 3m Buy It Now for only: $199.50 |
 TWO NEW IONIC AIR PURIFIER PRO FRESH CLEANER IONIZER UVS $96.88 Time Remaining: 2h 1m |
 NEW GREEN AIR PURIFIER OZONE GENERATOR ALPINE CLEANER $169.95 Time Remaining: 3d 12h 4m Buy It Now for only: $169.95 |
 NEW GREEN AIR PURIFIER OZONE GENERATOR ALPINE CLEANER $159.95 Time Remaining: 2h 3m Buy It Now for only: $179.95 |
 TWO NEW IONIC AIR PURIFIER PRO FRESH CLEANER IONIZER UVa04S $96.88 Time Remaining: 2h 27m Buy It Now for only: $109.99 |
 TWO NEW FRESH IONIC AIR PURIFIER UV OZONE CLEANER 04A $87.96 Time Remaining: 5d 12h 12m Buy It Now for only: $87.96 |
 GREEN AIR HP PURIFIER OZONE GENERATOR ALPINE CLEANER $159.95 Time Remaining: 3h 4m Buy It Now for only: $179.95 |
 AIR PURIFIER HEPA CARBON IONIC OZONE GENERATOR CLEARNER UV C REMOTE CLEANER NEW $127.97 Time Remaining: 16d 3h 26m Buy It Now for only: $127.97 |
 New Comfort 6 Stage Air Purifier Cleaner HEPA UV Ozone Generator 3 YR Warranty $157.00 (1 Bid) Time Remaining: 3h 4m |
 TWO NEW PRO IONIC FRESH BREEZE ESP AIR PURIFIER UV CLEANER 081E $169.99 Time Remaining: 3h 4m Buy It Now for only: $189.99 |
 TWO NEW PRO IONIC FRESH BREEZE AIR PURIFIER UV CLEANER $86.98 Time Remaining: 20d 4h 2m Buy It Now for only: $86.98 |
 TWO NEW FRESH IONIC AIR PURIFIER UV OZONE FRESH CLEANER A $87.96 Time Remaining: 3h 33m |
 AIR PURIFIER OZONE HEPA UV BLACK COMMERCIAL CLEANER SMOKE REMOVER MOLD REMOVAL $127.97 Time Remaining: 13d 5h 55m Buy It Now for only: $127.97 |
 NEW IONIC AIR PURIFIER PRO UV OZONE CLEANER ESP FILTER IONIZER $89.98 Time Remaining: 3h 35m Buy It Now for only: $127.99 |
 NEW IONIC AIR PURIFIER PRO UV OZONE CLEANER ESP FILTER IONIZER ap81 $89.98 Time Remaining: 3h 43m Buy It Now for only: $127.99 |
 AIR PURIFIER OZONE HEPA UV 3500 SF COMMERCIAL CLEANER SMOKE REMOVER MOLD REMOVAL $128.98 Time Remaining: 24d 3h 40m Buy It Now for only: $128.98 |
 NEW GREEN AIR PURIFIER OZONE GENERATOR ALPINE CLEANER $159.95 Time Remaining: 4h 3m Buy It Now for only: $179.95 |
 NEW COMMERCIAL OZONE GENERATOR AIR PURIFIER CLEANER w $149.99 Time Remaining: 3d 9h 17m Buy It Now for only: $149.99 |
 Ionic Air Purifier Ozone Ionizer Cleaner Fresh Clean Air Living Home Office New $129.95 Time Remaining: 4h 13m Buy It Now for only: $144.95 |
 NEW AIR PURIFIER HEPA IONIC UV FRESH CLEANER 3000 ft $219.00 Time Remaining: 4h 13m |
 Portable Negative Ion Ionic Fresh Air Purifier Cleaner $20.90 Time Remaining: 16d 20h 30m Buy It Now for only: $20.90 |
 NEW IONIC UV AIR PURIFIER PRO FRESH CLEANER IONIZERAAPA $59.99 Time Remaining: 4h 34m |
 2 UNITS 5 IN 1 AIR PURIFIER CLEANER UV Light ESP Ozone Carbon Ionizer $87.98 Time Remaining: 24d 10h 49m Buy It Now for only: $87.98 |
 NEW 4 IN 1 IONIC AIR PURIFIER ESP FILTER BREEZE IONIZERUV CLEANER 1E $87.99 Time Remaining: 4h 42m Buy It Now for only: $99.99 |
 New Comfort 6 Stage Air Purifier Cleaner HEPA UV Ozone Generator 3 YR Warranty $167.00 Time Remaining: 5h 3m |
 12V Auto Car Fresh Air Ionic Purifier Oxygen Bar Ozone Ionizer Cleaner Black $4.50 Time Remaining: 9d 14h 29m Buy It Now for only: $4.50 |
 GREEN AIR HP PURIFIER OZONE GENERATOR ALPINE CLEANER $159.95 Time Remaining: 5h 3m Buy It Now for only: $179.95 |
 AIR PURIFIER FRESH IONIC IONIZER MACHINE IONIZER CHARCOAL CLEANER FRESHENER ION $49.99 Time Remaining: 1d 8h 54m Buy It Now for only: $49.99 |
 12V Mini Auto Car Fresh Air Ionic Purifier Oxygen Bar Ozone Ionizer Cleaner Red $0.99 Time Remaining: 5h 46m |
 NEW GREEN AIR PURIFIER OZONE GENERATOR ALPINE CLEANER $159.95 Time Remaining: 6h 3m Buy It Now for only: $179.95 |
 NEW IONIC AIR PURIFIER PRO FRESH CLEANER IONIZER FRIDGE $6.77 Time Remaining: 4d 17h 58m Buy It Now for only: $6.77 |
 NEW 4 IN 1 IONIC AIR PURIFIER ESP FILTER IONIZERUV CLEANER E $87.99 Time Remaining: 6h 39m Buy It Now for only: $99.99 |
 12V Mini Auto Car Fresh Air Ionic Purifier Oxygen Bar Ozone Ionizer Cleaner $2.42 Time Remaining: 23d 22h 53m Buy It Now for only: $2.42 |
 TWO NEW PRO IONIC FRESH BREEZE AIR PURIFIER IONIZER UV CLEANERap4A $96.95 Time Remaining: 7h 5m Buy It Now for only: $109.95 |
 NEW IONIC AIR PURIFIER PRO UV OZONE CLEANER ESP FILTER IONIZER REMOTE e81E $87.98 Time Remaining: 7h 6m Buy It Now for only: $127.99 |
 NEW IONIC AIR PURIFIER PRO FRESH BREEZE CLEANER IONIZER $54.98 Time Remaining: 21d 14h 14m Buy It Now for only: $54.98 |
 GREEN AIR HP PURIFIER OZONE GENERATOR ALPINE CLEANER $159.95 Time Remaining: 7h 18m Buy It Now for only: $179.95 |
 GREEN AIR HP PURIFIER OZONE GENERATOR ALPINE CLEANER $159.95 Time Remaining: 15d 16h 43m Buy It Now for only: $159.95 |
 NEW COMMERCIAL OZONE GENERATOR AIR PURIFIER CLEANER w $138.99 Time Remaining: 7h 43m |
 TWO NEW PRO IONIC FRESH BREEZE AIR PURIFIER IONIZER UV CLEANERap4A $96.95 Time Remaining: 7h 47m Buy It Now for only: $109.95 |
 NEW IONIC AIR PURIFIER PRO UV OZONE BREEZE CLEANER IONIZER 04A $56.31 Time Remaining: 13d 12h 28m Buy It Now for only: $56.31 |
 NEW IONIC AIR PURIFIER ESP FILTER IONIZER FRESH UV CLEANER AIR PURIFICATION 1e $88.99 Time Remaining: 7h 56m Buy It Now for only: $98.99 |
 Bionaire BAP1500 Tower Air Purifier Cleaner Oscillating BAP 1500 $24.99 Time Remaining: 6d 4h 19m Buy It Now for only: $24.99 |
 TWO NEW FRESH IONIC AIR PURIFIER UV OZONE FRESH CLEANER A $87.96 Time Remaining: 8h 2m |
 NEW GREEN AIR PURIFIER OZONE GENERATOR ALPINE CLEANER $159.95 Time Remaining: 8h 3m Buy It Now for only: $179.95 |
 New Comfort 6 Stage Air Purifier Cleaner HEPA UV Ozone Generator 3 YR Warranty $175.00 Time Remaining: 7d 10h 20m Buy It Now for only: $175.00 |
 New Comfort 6 Stage Air Purifier Cleaner HEPA UV Ozone Generator 3 YR Warranty $165.00 Time Remaining: 8h 4m |
 12V Mini Auto Car Fresh Air Ionic Purifier Oxygen Bar Ozone Ionizer Cleaner $2.88 Time Remaining: 23d 22h 51m Buy It Now for only: $2.88 |
 NEW IONIC FRIDGE AIR PURIFIER OZONE CLEANER REFRIGERATOR DEODORIZER $19.99 Time Remaining: 8h 58m |
 NEW IONIC AIR PURIFIER PRO UV OZONE CLEANER ESP FILTER IONIZER APE $88.98 Time Remaining: 9h 9m Buy It Now for only: $127.99 |
 Whirlpool Air Purifier Air Cleaner Filter Replacement HEPA Filter 1183054K $82.95 Time Remaining: 20d 8h 38m Buy It Now for only: $82.95 |
 New Air Purifier w washable HEPA UV Ionic Cleaner 3000F $175.99 Time Remaining: 9h 13m |
 Sharper Image Ionic Breeze GP Professional Series SI730 Air Purifier Cleaner $90.00 Time Remaining: 29d 14h 3m Buy It Now for only: $90.00 |
 GREEN AIR HP PURIFIER OZONE GENERATOR ALPINE CLEANER $159.95 Time Remaining: 9h 18m Buy It Now for only: $179.95 |
 NEW 4 IN 1 IONIC AIR PURIFIER ESP FILTER BREEZE IONIZERUV CLEANER 81E $87.99 Time Remaining: 9h 59m Buy It Now for only: $99.99 |
 NEW IONIC AIR PURIFIER FRESH CLEANER IONIZER $16.90 Time Remaining: 18d 14h 53m Buy It Now for only: $16.90 |
 NEW GREEN AIR PURIFIER OZONE GENERATOR ALPINE CLEANER $159.95 Time Remaining: 10h 3m Buy It Now for only: $179.95 |
 NEW IONIC AIR PURIFIER PRO FRESH UV CLEANER IONIZER $63.99 Time Remaining: 29d 18h 18m Buy It Now for only: $63.99 |
 New Comfort 6 Stage Air Purifier Cleaner HEPA UV Ozone Generator 3 YR Warranty $165.00 Time Remaining: 10h 4m |
 NEW IONIC AIR PURIFIER ESP FILTER IONIZER FRESH UV CLEANER AIR PURIFICATION 1e $88.99 Time Remaining: 10h 20m Buy It Now for only: $98.99 |
 Oreck Assail A Cell Air Purifier Cleaner Qty 2 Cans The Best for Truman Cells $30.00 Time Remaining: 1d 17h 25m Buy It Now for only: $30.00 |
 TWO NEW FRESH IONIC AIR PURIFIER UV OZONE FRESH CLEANER pr4a $87.96 Time Remaining: 10h 54m |
 New Comfort 6 Stage Air Purifier Cleaner HEPA UV Ozone Generator 3 YR Warranty $165.00 Time Remaining: 7d 10h 19m Buy It Now for only: $165.00 |
 NEW IONIC AIR PURIFIER PRO OZONE UV CLEANER ESP FILTER IONIZER apo8e8 $89.98 Time Remaining: 11h 13m Buy It Now for only: $127.99 |
 GREEN AIR HP PURIFIER OZONE GENERATOR ALPINE CLEANER $159.95 Time Remaining: 11h 27m Buy It Now for only: $179.95 |
 75kV NEGATIVE ION GENERATOR FOR AIR PURIFIER CLEANER 120 VAC Ionizer New Unit $15.30 Time Remaining: 27d 2h 44m Buy It Now for only: $15.30 |
 NEW GREEN AIR PURIFIER OZONE GENERATOR ALPINE CLEANER $159.95 Time Remaining: 12h 3m Buy It Now for only: $179.95 |
| Account limit of 2197 requests per hour exceeded. |
Water Purifiers And Activated Carbon: Adsorb Or Adsorb?
Water has been purified with activated carbon for hundreds of years stretching back to ancient India. Most of us have seen activated carbon for sale in pet stores for cleaning water and have used a crude cousin, charcoal, to cook steaks in the backyard.
As a refined version of charcoal, activated carbon is made by super heating organic material like wood or coconut shells. This super heating drives out impurities and causes the surface area of the resulting material to become tremendous. It is this large surface area that allows this substance to be used to clean water.
For years the process of cleaning water with activated carbon in water purifiers was referred to as absorption. This term refers to what a sponge does with water and it is easy to visualize the activated carbon acting like a sponge, soaking up contaminants. However, this is not actually how the process works. The molecules inside the activated carbon are passive because they are connected to other molecules around their entire perimeter. The molecules on the surface are not as "happy" because they are exposed on one side without another carbon molecule as company. Therefore, these exposed carbon molecules are actively seeking something to "hook to" or bond with. As impurity in the water pass the activated carbon these exposed molecules bond with the impurities through a process of adsorption. When the entire surface area of the activated carbon is covered with impurities is quits adsorbing impurities.
Once the entire surface of the activated carbon is completely covered with impurities the water purifier quits working. At this point it is possible to "re-activate" the carbon by reheating it and thus driving off the impurities in the air. However, since this is a relatively tricky process and may result in some impurities being picked up from the oven it is probably best to leave this to the experts and simply replace the carbon in the water purifier.
Contact time is the primary attribute that determines the efficiency or effectiveness of water purifiers. Image a flow of water that is moving at a hundred miles per hour though a thin mat of activated carbon. In this scenario not much is going to happen because the water is not in contact with the activated carbon for a sufficient period of time. Therefore the higher the volume of water that the water purifiers is trying to clean the larger the filter should be. This is why a relatively small activated carbon water purifier works great on an ice maker in your home. Not much water is moving though the filter's quarter inch line. This contact time constraint also indicates that it is better to place several medium sized water purifiers around the house than to install a water purifier for the whole house unless you are will to install a very large filter that will have to handle showers and baths.
Now we know that the activated carbon adsorbs rather than absorbs impurities and that contact time is the most important component in the high quality water equation. These facts indicate that it is best to add several water purifiers where needed and to change the activated carbon filters on a regular basis.
About the Author
Ted Zajac Jr. is a graduate of Johns Hopkins University and Vice President of Technology for ClearFlite Incorporated that can be found at http://www.airpurifiers.com/. Ted has been published in a variety of magazines from Byte to Hydraulics and Pneumatics.