Many scientists have carried out experiments to demonstrate how the ionization of air in closed environments leads to the reduction of pathogens in the air itself and also on surfaces.
1. Abidin et al. Study on increased mortality of dust mites due to negative ionization.
Mites are the main source of allergens in wetlands and sensitisation to their allergens is an important risk factor for asthma in exposed individuals.
Mite allergens sensitize and induce perennial rhinitis, asthma or atopic dermatitis in most patients with allergic disease. There is convincing evidence that avoiding the mite allergen can effectively reduce allergic symptoms.
Ionizers can offer a simple, efficient and cost-effective way to reduce allergen levels in the home environment. Recently there has been a great increase in interest in air ionizers for use in both home and work environments.
Initial research focused on the ability of ionizers to electrostatically precipitate dust and airborne allergens. The direct actions of negative and positive ions on the respiratory system were also studied. It has been reported that, by producing ions, the ioniser destroys the main allergen of Der p 1 dust mites. However, to date there is no published data showing that the ions emitted by the ioniser are acaricides. The aim of Abidin's study was to investigate in the laboratory, in a scientific way, the short and long term efficacy of a commercial air ionizer in killing mites Dermatophagoides pteronyssinus (D. pteronyssinus) and Dermatophagoides farinae(D. farinae).
The result was very positive as the study demonstrated increased mortality of mites with increased exposure time of an ioniser and suggests that negative ions produced by an ioniser kill dust mites and can be used to reduce populations of natural mites on exposed surfaces such as floors, clothes, curtains, etc. However, the study revealed that the effectiveness of ionisation on dust mites within upholstered materials such as mattresses, sofas, cushions is understandably reduced.
2. Jiang et al. Study of the benefits of air ionization on human and animal health and the growth of micro-organisms.
The authors pointed out that exposure to negative ions has numerous beneficial effects on human health.
The most significant results were on the cardiovascular system, the respiratory system and mental health. There was also a rapid precipitation of particulate matter in the air, due to the action of negative ions, which electrically charged pollutant particles quickly precipitate to the ground with beneficial consequences first of all for the respiratory system and then for the whole human organism.
3. Hagbom et al  Study on the effects of ionization against viruses.
In the study the effects of ionization on different types of viruses of clinical importance such as calicivirus, rotavirus andinfluenza A virus were analyzed.
The main result of the study indicated that air ionization leads to failure of guinea pigs to become infected and loss of virus infectivity. Through the use of an ionising device, effective prevention of infection with influenza A virus (Panama strain 99) transmitted by air between animals and inactivation of the virus was observed (> 97%). The active ionizer prevented 100% (4 out of 4) of the guinea pigs from contracting the infection.
In addition, the device effectively captured airborne calicivirus, rotavirus and influenza viruses, with recovery rates of up to 21% after 40 minutes in a 19 m3 room.
Ionizers provide unique possibilities for quick and easy removal of virus from the air and offer the ability to simultaneously identify and prevent airborne virus transmission.
 Abidin SZ, Ming HT. Effect of a commercial air ionizer on dust mites Dermatophagoidespteronyssinus and Dermatophagoidesfarinae (Mites: Pyroglyphidae) in the laboratory. Asian Pacific journal of tropical biomedicine. 2012 Feb 1;2(2):156-8.
 Jiang SY, Ma A, Ramachandran S. Negative air ions and their effects on human health and air quality improvement. International journal of molecular sciences. 2018 Oct;19(10):2966.
 Hagbom M, Nordgren J, Nybom R, Hedlund KO, Wigzell H, Svensson L. Ionizing air affects influenza virus infectivity and prevents airborne-transmission. Scientific reports. 2015 Jun 23;5:11431.[/vc_column_text][/vc_column][/vc_row].
Author Diego Rossi - SOLS EBP - Environmental Technician in Biosafety - Air Treatment