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Description

The International Space Station (ISS) operates as a closed system. Water is recycled from humidity and urine and held in a wastewater tank; part of the Water Processing Assembly (WPA). Potable treated water is used indirectly in the Sabatier Reactor.The Sabatier Reactor is a key component in the Environmental Control and Life Support System (ECLSS). Three main functions of ECLSS: water recovery, air revitalization, and oxygen generation Sabatier Reactor recently failed due to contamination of DMSO2, dimethyl sulfone, and DMSD, dimethylsilanediol. DMSO2 and DMSD are emerging contaminants that are not removed by the media used in the WPA due to their low affinity. DMSO2 and DMSD are introduced into the water system through personal hygiene products such as lotion, conditioner, and wipes, which all contain volatile methyl siloxanes (VMS). VMS are decomposed into DMSO2 or DMSD and are found in urine. Ambersorb 4652, a styrenic polymer adsorbent that is not biobased or sustainable, is the current media used in the multifiltration beds in WPA on the ISS. Costly and unsustainable, Ambersorb 4652 is challenged to remove DMSD and DMSO2 from recycled water. Granular activated carbon (GAC) works similarly to a styrenic polymer adsorbent and can be made from biobased materials. Ionic liquids are liquid molten salts at temperatures < 100 ℃ that are typically composed of large and unsymmetrical organic cations and organic or inorganic ions. Composed of a hydrogen bond acceptor (HBA) and a hydrogen bond donor (HBD). Remarkable solvation ability for a broad range of natural and synthetic materials and compounds.

Publisher Location

Las Vegas (Nev.)

Publication Date

Spring 4-28-2023

Publisher

University of Nevada, Las Vegas

Language

English

Controlled Subject

Water--Purification--Filtration

Disciplines

Materials Science and Engineering | Sustainability

File Format

pdf

File Size

2481 KB

Comments

Faculty Mentor: Erica Marti

Rights

IN COPYRIGHT. For more information about this rights statement, please visit http://rightsstatements.org/vocab/InC/1.0/

Development of a Biobased Carbon Adsorbent for Treating Emerging Contaminants in Recycled Water on the International Space Station


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