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Proceedings Paper

A portable and high energy efficient desalination/purification system by ion concentration polarization
Author(s): Sung Jae Kim; Bumjoo Kim; Rhokyun Kwak; Geunbae Kim; Jongyoon Han
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Paper Abstract

The shortage of fresh water is one of the acute challenges that the world is facing now and, thus, energy efficient desalination strategies can provide substantial answers for the water-crisis. Current desalination methods utilizing reverse-osmosis and electrodialysis mechanisms required high power consumptions/large-scale infrastructures which do not make them appropriate for disaster-stricken area or underdeveloped countries. In addition, groundwater contamination by heavy metal compounds, such as arsenic, cadmium and lead, poses significant public health challenges, especially in developing countries. Existing water purification strategies for heavy metal removal are not readily applicable due to technological, environmental, and economical barriers. This presentation elucidates a novel desalination/purification process, where a continuous contaminated stream is divided into filtered and concentrated stream by the ion concentration polarization. The key distinct feature is that both salts and larger particles (cells, viruses, and microorganisms) are pushed away from the membrane, in continuous flow operations, eliminating the membrane fouling that plagues the membrane filtration methods. The power consumption is less than 5Wh/L, comparable to any existing systems. The energy and removal efficiency, and low cost manufacturability hold strong promises for portable, self-powered water purification/desalination system that can have significant impacts on water shortage in developing/rural part of the world.

Paper Details

Date Published: 24 October 2012
PDF: 6 pages
Proc. SPIE 8548, Nanosystems in Engineering and Medicine, 85483R (24 October 2012); doi: 10.1117/12.2000052
Show Author Affiliations
Sung Jae Kim, Seoul National Univ. (Korea, Republic of)
Bumjoo Kim, Pohang Univ. of Science and Technology (Korea, Republic of)
Rhokyun Kwak, Massachusetts Institute of Technology (United States)
Geunbae Kim, Pohang Univ. of Science and Technology (Korea, Republic of)
Jongyoon Han, Massachusetts Institute of Technology (United States)


Published in SPIE Proceedings Vol. 8548:
Nanosystems in Engineering and Medicine
Sang H. Choi; Jin-Ho Choy; Uhn Lee; Vijay K. Varadan, Editor(s)

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