Point-of-use activated carbon filters are most effective for removing which contaminant?

Point-of-use activated carbon filters are most effective for removing which contaminant?

• A. Volatile organic chemicals
• B. Microorganisms
• C. Radon
• D. Chlorine

Answer: (D)

Activated carbon removes contaminants primarily through adsorption, where molecules stick to the large surface area of the carbon pores. This works best for compounds that easily partition into the carbon surface and affect taste or odor. Point-of-use carbon filters are especially effective at removing chlorine from drinking water. Chlorine is a small, volatile molecule that readily adsorbs onto carbon, so the filter can reduce residual chlorine quickly as water passes through, improving taste and odor. Microorganisms aren’t reliably removed by carbon alone—adsorption isn’t a disinfecting action, and bacteria/viruses require disinfection or microfiltration to be effectively removed. Radon is a gas that isn’t efficiently captured by typical carbon beds at the flow rates used in POU filters, so carbon isn’t a dependable method for reducing radon. Some VOCs can be removed, but chlorine removal is the most consistent and expected benefit of a point-of-use activated carbon filter, making chlorine the best answer here.

Activated carbon removes contaminants primarily through adsorption, where molecules stick to the large surface area of the carbon pores. This works best for compounds that easily partition into the carbon surface and affect taste or odor.

Point-of-use carbon filters are especially effective at removing chlorine from drinking water. Chlorine is a small, volatile molecule that readily adsorbs onto carbon, so the filter can reduce residual chlorine quickly as water passes through, improving taste and odor.

Microorganisms aren’t reliably removed by carbon alone—adsorption isn’t a disinfecting action, and bacteria/viruses require disinfection or microfiltration to be effectively removed. Radon is a gas that isn’t efficiently captured by typical carbon beds at the flow rates used in POU filters, so carbon isn’t a dependable method for reducing radon. Some VOCs can be removed, but chlorine removal is the most consistent and expected benefit of a point-of-use activated carbon filter, making chlorine the best answer here.