Regresar

Collateral impact of COVID-19 on environmental health derived from improper disposition of masks

Abstract:

The use of masks by the general population as an element of personal protection against COVID-19 continued to rise during the first half of 2020, amid constant updates from the WHO about the target audience, their correct use and possible benefits, but where no protocols were defined for the management of the resulting waste. During the second half of 2020, the world population used 4.3 billion masks daily, of which 78.5% were discarded incorrectly, generating a volume of 2.61 (2.26-2.94; IC = 95%) million tons of waste disseminated in the environment. The plastic components incorporated in the manufacture of masks such as PP, PE and PET can take 400 years to degrade under environmental conditions, gradually fragmenting into microplastics, which affect the flora, fauna, water and soils of their environment. Additionally, some synthetic antioxidant additives (OA) used in the manufacture of plastics can further delay the degradation reactions of discarded masks into the environment, increasing their potential damage. It was calculated that 216.9 (188.5-245.3; IC = 95%) tons of AO168, 190 (165.2-214.9; IC = 96%) tons of AO168O and 442.7 (384.8-500.6; IC = 95%) tons of AO1010 were exposed to the environment due to the incorrect disposal of masks in the second half of 2020. Although the combined mass of these synthetic components only represents 0.017% of the masks discarded in the same period, its concentration is sufficient to increase the risk of damage to the environment.