Effectiveness and Concentration Distribution of Negative Air Ions on Human Health in Indoor Environment

Abstract

Negative air ions(NAIs) in indoor environments have been suggested to positively impact human health by effectively reducing particulate contamination and gaseous pollutants, as well as inhibiting the growth of microorganisms, bacteria and viruses.This study investigates the common ionizers with different module types, and the mechanism of NAIs for enhancing indoor air quality, as well as the positive and negative impacts on human health.The association between NAI concentrations and human health outcomes is examined, and alternative measures to balance beneficial and unavailing effects are investigated.While NAIs demonstrate efficacy in removing particulate pollutants, alleviating depression, enhancing cognitive function and even stimulating sympathetic activity, it is pertinent to acknowledge the presence of contradictory findings concerning their effects on cardiac autonomic function and respiratory physiology.To address this complexity, it is imperative to consider alternative measures that strike a balance between the beneficial and unavailing effects of NAIs.These measures can encompass a general assessment of the characteristics of particulate pollutants, a strategic selection of ionizer technologies, and adherence to the recommended optimal concentration thresholds of NAIs.

Keywords

indoor environment / negative air ion(NAI) / human health / particle removal / alternative measure

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Funding

Research Project of Marine Design and Research Institute of China