When selecting suitable activated carbon for filter cartridges, it is necessary to comprehensively consider the physicochemical properties of the activated carbon, the type of filter cartridge, and the specific application scenario to ensure efficient adsorption of target pollutants.

Evaluating the basic performance of activated carbon: Key indicators include iodine adsorption value (measures the adsorption capacity for small molecule liquid pollutants; a higher value is better), carbon tetrachloride adsorption value (reflects gas adsorption capacity), and methylene blue adsorption value (indicates decolorization capacity, indirectly reflecting pore structure). High-quality activated carbon also has well-developed pores, a loose texture, a lighter feel, and a larger volume; this can be verified through an underwater bubble test: the production of fine bubbles with a long-lasting sound after being placed in water indicates good adsorption performance.

Pay attention to raw materials and packaging: The raw materials of activated carbon affect the pore structure. For example, coconut shell activated carbon has dense pores, suitable for gas purification (such as formaldehyde removal); wood-based activated carbon has larger pores, making it more suitable for liquid treatment (such as water purification). Packaging should be properly sealed to prevent the activated carbon from prematurely adsorbing organic molecules from the air and becoming ineffective.

Matching Filter Cartridge Types and Application Scenarios: Common filter cartridge types include compressed (high-adsorption-value carbon material sintered with a binder, resulting in a stable structure and less prone to powder leakage) and bulk (carbon granules packed into the shell, lower cost). Application scenarios require specific selection: compressed cartridges are suitable for household water purifiers to ensure airtightness; coconut shell-based filters are preferred for air purifiers. Note that activated carbon is mainly used to adsorb organic impurities, residual chlorine, or odors. If heavy metals or microorganisms need to be removed, it should be combined with composite filtration such as PP cotton, RO membranes, or resin filters.

Avoiding Common Misconceptions: Do not rely solely on marketing claims such as "formaldehyde removal." Verify the manufacturer's measured data, such as iodine value or carbon tetrachloride adsorption value. Also, avoid using non-sealed packaging products, especially in highly polluted environments, to maintain long-term adsorption efficiency.