Abstract
Portable air cleaners (PACs) are widely used as the most effective strategies to improve indoor environment. However, with the indoor air components have become more complicated, the current studies focusing on the removal performance for composite pollutants have been inadequate. Therefore, it is necessary to evaluate the comprehensive removal performance of PACs by mixture that is mainly existed in indoor air. In this study, the initial clean air delivery rates (CADRs) of several best-selling sorption-based air cleaners in Chinese market were calculated with a mixing model. The results indicated that the PACs displayed a reliable performance in improving indoor air quality, especially in terms of particulate matter purification. Furthermore, the removal performance of volatile organic compounds (VOCs) by air cleaners was found to be negatively correlated with molecular weight and polarity of pollutant, and the PACs removal performance for most VOCs was improved by reducing the concentration of particulate matter in indoor air.
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