Researchers found the virus was detectable in aerosols for up to three hours, up to four hours on copper and up to 24 hours on cardboard. COVID-19 can also last up to three days on plastic and stainless steel, the scientists concluded.
Potential Relationship between Particulate Matter (PM) pollution and COVID-19 Infection Spread in Italy PDF
Therefore, on the basis of the collected data and observed relationships, it is reasonable to assume that, during the period 7 th -29 th February and in specific Northern Italian regions, PM10 concentration levels higher than the daily limit value resulted in a ‘boost’ process promoting the diffusion the COVID-19 among the exposed population, phenomenon not observed in other Italian regions that were affected by the contamination during the same period.
A liquid deodorizing composition containing an iron (II) compound and a chelating agent dissolved in water is known (JP-A-60-145143 and JP-A-211240). In use, the deodorizing composition is sprayed over a source of bad odors. The known deodorizing composition containing an iron (II) compound and a chelating agent is reactive with bad odor substances such as ammonia, amines, hydrogen sulfide, mercaptans.
Thus, when air containing odorous substances is contacted with the composition, the substances are reacted with the deodorizing composition and are removed from the air to give odorless air.
This invention relates to a novel composition containing divalent iron ions having various chemical and physiological effects such as deodorization, bactericidal action, freshness-preservation of foods, promotion of plant growth and flame-proofing (flame-retardation) of burnable materials.