Silver Foam as Long-Term Passive Biocide to Potable Water Systems

Date

2019-07-07

Journal Title

Journal ISSN

Volume Title

Publisher

49th International Conference on Environmental Systems

Abstract

Silver is being considered as the biocide for future exploration missions. Maintaining microbial control in spacecraft potable water storage and delivery systems is a significant challenge for long-duration human space exploration. The current electrolytic-based silver ion dosing system still has some challenges to be addressed and there is a need for a reliable passive silver biocide delivery mechanism. This paper describes the early stage development of a silver-based composite foam as an alternative silver dosing release technology, either to be used as a standalone, or in conjunction with the electrolytic-based systems to increase the overall system reliability. Composite foam, containing silver chloride nano particles, was synthesized and its structural properties and silver ion release rate are being optimized. This paper concerns the design, synthesis, and optimization of the silver composite foam.

Description

Tesia Irwin, The Bionetics Corporation, USA
Wenyan Li, AECOM, USA
Jerry Buhrow, National Aeronautics and Space Administration (NASA), USA
Angie Diaz, URS Federal Services, Inc, USA
Luz Calle, National Aeronautics and Space Administration (NASA), USA
Michael Callahan, National Aeronautics and Space Administration (NASA), USA
ICES303: Physio-Chemical Life Support - Water Recovery & Management Systems - Technology and Process Development
The 49th International Conference on Environmental Systems was held in Boston, Massachusetts, USA on 07 July 2019 through 11 July 2019.

Keywords

Silver, Biocide, Delivery mechanism, Silver composite foam

Citation