Phenols are commonly removed from wastewater using which method?

The removal of phenols from wastewater is effectively achieved through the use of activated carbon. This method leverages the high surface area and porous structure of activated carbon to adsorb contaminants, including phenolic compounds, from the wastewater. The adsorption process allows phenols to bind to the carbon particles, thereby reducing their concentration in the effluent.

In contrast, chlorination and ozone treatment are primarily used for disinfection and oxidation purposes. While these methods can reduce some organic pollutants, they may not be as effective in specifically targeting phenolic compounds. Chlorination, for example, can sometimes lead to the formation of harmful chlorinated by-products rather than effectively removing phenols. Gravity settling, on the other hand, is a physical separation process typically used for solids and does not effectively address soluble organic contaminants like phenols. Therefore, activated carbon is considered the most suitable and effective method for removing phenols from wastewater.