Every time you turn on your tap, it's probably safe to assume the water is…well, potable. But the cold, hard fact is that hundreds of thousands of Americans are being unwittingly exposed to the effects of chlorine, forever chemicals (PFAS), heavy metals, pesticides, and pharmaceutical byproducts present in their tap water daily. The answer starts with understanding the science behind the activated carbon water filter, how does it works, and choosing a system that delivers.
What is activated carbon?
Activated carbon is a highly porous form of carbon that has been chemically or thermally treated to drastically increase its surface area. To put this in perspective, one gram of activated carbon can hold up to 500 m² of surface area, the equivalent of an American football field inside one gram of the stuff.
This massive surface area allows activated carbon to hold vast quantities of contaminants by a process called adsorption, and not absorption as it might seem. In this process, contaminants become chemically attracted to the carbon's surface area, where they physically bond rather than become one with the carbon. Organic contaminants like chlorine, volatile organic compounds (VOCs), and forever chemicals stick to the carbon's surface as water passes through the filter, leaving behind cleaner, safer water.
Why coconut shell carbon is the king of carbon filtration.
Not all activated carbon is created equal. Some filters will use wood and charcoal-based carbons, but when it comes to top-tier water filtration, it's the coconut carbon water filter that reigns supreme. A coconut carbon water filter is filled with a high concentration of micro-pores, and its structure makes it capable of attracting and holding onto a much wider spectrum of contaminants than a coal-based carbon water filter would. Additionally, coconut-based carbon is a naturally sustainable and renewable resource, yielding no harmful by-products during either use or manufacturing, and has become the premium choice in the US market.
How does an activated carbon water filter work?
So you've been trying to find a concrete answer to the activated carbon water filter, how does it work, and now's the time you get it, explained in a few simple steps.
Step 1: Mechanical Filtration
Water initially passes through the densely packed, microscopic pore wall of the carbon block, where microplastics, parasites, bacteria, sediment, cysts, and other particles are trapped by simple mechanical filtration and held in place until the next stage of purification begins. It's essentially a microscopic net that stops everything it doesn't allow through.
Step 2: Chemical Adsorption
From there, the water continues into the activated carbon, where chemical contaminants such as the aforementioned PFAS, VOCs, and any pesticides or herbicides it catches are attracted to and bond with the surface of the carbon itself through intermolecular forces called Van der Waals forces. This process is an activated carbon water filter. How does it work when it matters most, because this is where it's working hardest to clean your water.
Step 3: Mineral Preservation
Many modern-day water filtration systems fail on this point, like reverse osmosis, which will pull everything from your water, minerals included. This allows beneficial naturally occurring elements like potassium, magnesium, and calcium to stay right where they are – right where you need them! This is one of the many reasons the activated carbon water filter how does it work at a holistic level of health consciousness.
Step 4: Contact Time
As you can imagine, the longer water stays in contact with the carbon, the greater the purification capacity. Thus, the effectiveness of activated carbon filtration designs can differ based on their format. Carbon block filters force every ounce of water to travel the length of the filter, allowing each molecule the maximum contact time possible compared to traditional granular activated carbon filters, where there are pathways within the GAC allowing water to skip through the process quicker. So it's worth understanding how an activated carbon water filter works at a design level, not just a chemical one.
Granular Activated Carbon vs. Carbon Block Filters: Which is better?
When it comes to filtration systems in American homes, the two most commonly found activated carbon filter types are Granular Activated Carbon and Carbon Block filters.
GAC filters are characterized by loose carbon granules within a cartridge. Water is streamed through these granules, and while they do an acceptable job of filtering out chlorine, an overwhelming majority of VOCs, and any potential odors, a majority of the contaminants that a carbon block can handle simply pass right by. Pitcher filters are commonly designed with GAC.
Carbon block filters compress activated carbon into a tight matrix that requires all water to pass through every bit of carbon, greatly extending contact time. A 0.5-micron carbon block filter can hold approximately 20x the contaminants as its GAC counterpart. This is particularly beneficial for consumers concerned about PFAS and lead contamination within their drinking water.
Other Water Filtration Systems Compared to Activated Carbon:
Here is a quick look at a couple of other, more common filtration methods compared to the activated carbon water filter. How does it work?
-
Reverse Osmosis: Does an outstanding job removing almost any contaminants from your water; however, it removes everything, including minerals essential to health, and requires professional installation. Additionally, reverse osmosis systems also waste more water and are much more energy-intensive.
-
UV filtration: This system uses ultraviolet light to kill any and all bacteria or viruses that you could find, but that is it; it does not remove contaminants from your water at all.
-
Pitcher Filters: Convenient and inexpensive, these water filter pitchers use relatively small amounts of GAC; thus, they will not be as effective at removing contaminants as a system with more surface area, like a block carbon filter.
-
Activated Carbon Gravity Filtration: Filters a broad spectrum of contaminants from your water while also keeping the naturally occurring essential minerals in your water. This system uses no electricity and is one of the least expensive and most reliable clean water sources for any American home.
Phoenix Gravity: A Leader in the Activated Carbon Filtration Space.
Phoenix Gravity is an American company that has been operating for 50 years and is dedicated to the science behind activated carbon water filter how does it work in a real-world setting. Their systems utilize their NSF/ANSI 42 and 372-certified coconut carbon water filter elements housed within an AISI 304 stainless steel structure-no plastic, no electricity, no professional plumber. Every set of Phoenix Gravity filter cartridges can last up to 5,500 gallons (that's almost $0.05 per gallon!) and comes with a 100-day money-back guarantee.
Final Thoughts
The science behind the activated carbon water filter, how does it work is nothing short of brilliant. Its ability to trap organic contaminants through the process of adsorption makes it a truly powerful activated carbon filtration method, and when used in a carbon block filter design with coconut-based carbon, it is virtually unmatched for everyday American household purification needs.
So whether you are concerned about forever chemicals, lead, or simply the quality of your tap water overall, you may want to invest in your future by purchasing a high-quality activated carbon water filter today. It may look clean coming out of the tap now, but you can ensure that it IS clean now.
Contact Phoenix Gravity today.
Frequently Asked Questions
Q1. How does an activated carbon water filter work at a molecular level?
As water passes through the filter, contaminant molecules are attracted to the carbon's surface through Van der Waals intermolecular forces called adsorption. The vast surface area provided by the millions of micropores on activated carbon molecules allows these substances-chlorine, PFAS, VOCs, microplastics, etc.-to be chemically and physically trapped by the carbon filter element, which is why the activated carbon water filter how does it work so effectively.
Q2. What is the difference between GAC and carbon block filters?
GAC filters contain loose carbon granules. This loose structure can allow water to pass through the cartridge with a quicker flow time and less filtration precision. The carbon block, on the other hand, compacts a larger quantity of carbon into a block form, thus pushing every ounce of water through the full carbon matrix and increasing the potential contaminant removal of a 0.5-micron filter by up to 20x compared to traditional GAC filters. This is a great thing to know when you're trying to make an educated decision as to the right system for your home.
Q3. Why is coconut shell carbon preferred over coal-based carbon in water filters?
Coconut carbon typically has a more porous microstructure and therefore a larger internal surface area compared to that of coal or wood-based carbons, and can hold a wider spectrum of chemicals. Also, coconut-based carbon tends not to remove minerals like potassium, magnesium, and calcium in as large amounts as its counterparts.
Q4. Does activated carbon filtration remove beneficial minerals from water?
No, in fact, this is one of its best qualities! Activated carbon systems selectively remove contaminants such as organic pollutants and heavy metals while leaving naturally occurring minerals such as potassium, calcium, and magnesium untouched. This ensures your drinking water is both clean and nutritionally beneficial.
Q5. How do I know when it's time to replace my Phoenix Gravity filter elements?
Each filter element set from Phoenix Gravity has been certified for 5,500 gallons of water filtration. For a typical household, this means they will need to be replaced after about 12 months of use, although some households with heavier usage may need to do so earlier. You can typically tell your filter element is getting saturated when you notice a decline in your water's flow rate, as it indicates the carbon pores are approaching their full capacity.