1.4K Views 3 years ago

Toxic Space Dust on the International Space Station Raises Environmental Concerns

International space station on orbit of Earth planet. ISS. Dark background. Elements of this image furnished by NASA

A recent study has shed light on the presence of toxic contaminants in dust samples collected from the International Space Station. These findings have unveiled concentrations of pollutants exceeding those commonly found in the floor dust of many U.S. households. Published in the Environmental Science and Technology Letters journal, the study’s results are urging scientists, engineers, and policymakers to reevaluate material choices for future space stations and habitats.

Source: @universepuzzlee/YouTube

The study, conducted by researchers from various institutions including the University of Birmingham, has implications that stretch far beyond the confines of our planet. The ISS has been inhabited by astronauts for over two decades, providing a unique opportunity to assess the environmental impact of human presence in space. While the concentrations of toxic contaminants in the ISS dust samples were generally within the range found on Earth, they were found to surpass the median values typically found in U.S. and Western European homes.

The contaminants identified in the “space dust” were a concerning array of substances. These included polybrominated diphenyl ethers (PBDEs), hexabromocyclododecane (HBCDD), “novel” brominated flame retardants (BFRs), organophosphate esters (OPEs), polycyclic aromatic hydrocarbons (PAH), per- and poly-fluoroalkyl substances (PFAS), and polychlorinated biphenyls (PCBs). Some of these compounds are notorious for their persistence and harmful effects on human health and the environment.

The study’s co-author, Professor Stuart Harrad from the University of Birmingham, highlighted the importance of this discovery in shaping the design and construction of future space stations. He emphasized the potential to mitigate contaminant sources by careful material selection in the early stages of space habitat development.

It’s noteworthy that some of the identified substances, such as PBDEs and PCBs, are classified as persistent organic pollutants under international conventions. Others, like certain PAH and OPEs, are being evaluated for potential restrictions due to their adverse effects. Furthermore, PFAS, commonly referred to as “forever chemicals,” are found in numerous consumer products and firefighting foams. Their presence on the ISS suggests that even well-engineered, controlled environments are not immune to Pollution.

The ISS, in its role as a microcosm of human activity in space, presents unique challenges. One of these challenges lies in the potential sources of these toxic contaminants. “Off-the-shelf” items such as cameras, MP3 players, tablets, medical devices, and clothing were identified as possible sources.

The study also highlighted the uncertainty surrounding the effectiveness of the ISS’s air circulation system in removing chemicals like flame retardants. While the system effectively eliminates carbon dioxide and gaseous trace contaminants, its ability to tackle complex organic pollutants remains uncertain.

Ultimately, these findings are a wake-up call for the future of human habitation beyond Earth. As we venture further into space and establish more elaborate space stations and habitats, the lessons learned from the ISS will be invaluable. Careful consideration of material choices, source control, and waste management will be imperative to prevent the accumulation of hazardous pollutants and ensure the safety of astronauts and the environments they inhabit.

Sign this petition to tell the EPA to clean up climate Pollution!