Billions of face masks were used every month during the coronavirus crisis without being properly recycled. Now researchers are warning about the microplastics and hormone-disrupting chemicals released when the masks begin to break down in nature.

During the coronavirus crisis, a large portion of the world’s population was forced to use face masks to move around in society in the belief that it would reduce the risk of infection spread, something that authorities strongly claimed despite there being very weak support for that hypothesis. In many places, children were also required to wear face masks, despite experts warning that there could be health risks for young people wearing masks for extended periods, such as oxygen deficiency and brain damage.

In many countries it was a legal requirement with fines as a consequence, while in other countries it was implemented as a strong recommendation – such as in Sweden. After the coronavirus crisis, however, it has been proposed to introduce some form of “pandemic law” in Sweden where requirements for face masks would be included.

Although washable face masks began to be sold, disposable masks were the ones used most frequently, and in some countries, such as Austria and Germany, such masks were specifically required. However, it was quickly established that these surgical masks created environmental problems – in just 14 months, the number of discarded masks in nature had increased by 9,000 percent in a number of Western countries including Sweden.

Billions of masks every month

During the coronavirus crisis, an estimated 129 billion face masks made primarily of polypropylene and other plastics were used every month worldwide. Since there has been no recycling system, most have ended up in landfills or as litter in nature, and have begun to break down.

Researchers from the University of Coventry in Britain have investigated how many substances are released from face masks in water. They did this by leaving newly purchased masks of various types, which were used during the coronavirus crisis, in purified water for 24 hours. They then filtered the liquid to see what came out.

The results, which have been published in Environmental Pollution, show that all the examined face masks released microplastics. FFP2 and FFP3 masks leaked the most – that is, the face masks that were marketed as having the best protection against infection.

Hormone-disrupting substances

What worried the researchers most, however, was that the face masks also released bisphenol B, which is a hormone-disrupting chemical. Anna Bogush, who is one of the researchers behind the study, believes that the study underscores the urgent need to reconsider how we produce, use and dispose of face masks.

— We can’t ignore the environmental cost of single-use masks, especially when we know that the microplastics and chemicals they release can negatively affect both people and ecosystems, she tells The Guardian and continues:

— As we move forward, it’s vital that we raise awareness of these risks, support the development of more sustainable alternatives and make informed choices to protect our health and the environment.