Silver Foam: A Novel Approach for Long-Term Passive Dosing of Biocide in Spacecraft Potable Water Systems -- Update 2022

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dc.creatorIrwin, Tesia
dc.creatorLi, Wenyan
dc.creatorDiaz, Angie
dc.creatorCalle, Luz
dc.creatorCallahan, Michael
dc.date.accessioned2022-06-17T18:50:53Z
dc.date.available2022-06-17T18:50:53Z
dc.date.issued7/10/2022
dc.descriptionTesia Irwin, The Bionetics Corporation, US
dc.descriptionWenyan Li, Amentum, US
dc.descriptionAngie Diaz, Amentum, US
dc.descriptionLuz Calle, NASA, US
dc.descriptionMichael Callahan, NASA, US
dc.descriptionICES303: Physio-Chemical Life Support- Water Recovery & Management Systems- Technology and Process Developmenten
dc.descriptionThe 51st International Conference on Environmental Systems was held in Saint Paul, Minnesota, US, on 10 July 2022 through 14 July 2022.en_US
dc.description.abstractA spacecraft water disinfection system, suitable for extended length space exploration, should prevent or control the growth of microbes, prevent or limit biofilm formation, and prevent microbiologically influenced corrosion. In addition, the system should have minimal maintenance requirements, be chemically compatible with all materials in contact with the water, be safe for human consumption, and be suitable to be shared across international spacecraft platforms and mission architectures. Silver ions are a proven broad-spectrum potable water biocide under investigation for future exploration missions. The competing technology for dosing silver ions in future water systems is based on actively dosing the ions via electrolytic production. Several challenges with this approach have prompted additional investigations into alternative dosing techniques. Control-release technology is an attractive option for developing a high-reliability passive silver dosing device. This paper describes the continued development of a nanoparticle/polyurethane (NP/PU) composite foam for the controlled release of silver ions, and is intended to build upon the 2021 International Conference on Environmental Systems (ICES) paper number 116. This paper provides the technical background and performance results (wash testing and ongoing long-term silver ion release testing) from the silver chloride (AgCl) NP/PU composite foams. The ultimate goal of the project is to develop a stable and reliable passive dosing silver ion release device for use in future spacecraft potable water systems.
dc.format.mimetypeapplication/pdf
dc.identifier.otherICES-2022-097
dc.identifier.urihttps://hdl.handle.net/2346/89635
dc.language.isoengen_US
dc.publisher51st International Conference on Environmental Systems
dc.subjectDisinfect
dc.subjectsilver
dc.subjectwastewater
dc.subjectbiocide
dc.subjectpassive dosing
dc.subjectAgFoam
dc.subjectsilver foam
dc.subjectdosing
dc.titleSilver Foam: A Novel Approach for Long-Term Passive Dosing of Biocide in Spacecraft Potable Water Systems -- Update 2022
dc.typePresentationen_US

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