Once activated, activated carbon is made into water filters that can be used in a variety of applications, from home water filtration systems to industrial water treatment processes, and everything in between. But what makes activated carbon so good at purifying water? How does it work?
Let's take a look at the intricate workings of activated carbon's structure and its role in purifying water:
1. Porous structure
Activated carbon has a large number of small pores produced during the activation process. These pores are small and vary in size. This gives it a unique structure that traps contaminants and chemicals as water passes through the filter. So, the more pores there are, the more places there are to capture impurities, and the higher the chance of effective adsorption.
2. Expand surface area
Activated carbon is like a sponge. Although it is small in size, it has a large surface area, allowing enough space for contaminants to adhere, ensuring that the water flowing through it is thoroughly cleaned.
This larger surface area facilitates the adsorption of a variety of impurities, including chlorine, volatile organic compounds (VOCs), pesticides, herbicides, and even certain heavy metals like lead and mercury.
3. How contaminants are captured
As water flows through the filter, contaminants are adsorbed onto the porous surface of the carbon particles. They stick to the surface and remain there, essentially being trapped.
4. Selective removal of contaminants
One of the many notable properties of activated carbon is its selectivity for different types of contaminants. It can be customized to specific water quality issues, whether it is removing chlorine from tap water, eliminating volatile organic compounds (VOCs) from well water, or reducing the taste of certain chemicals, activated carbon filters offer customizable solutions to meet different filtering needs.
5. Regeneration and longevity
Over time, activated carbon may absorb contaminants, reducing its filtration efficiency. However, unlike some filter media, activated carbon can often be regenerated through processes such as thermal activation or chemical cleaning, extending its life and reducing waste.
Regular maintenance and replacement of activated carbon filters is essential to ensure continued water purification.
