Membrane-free desalination using ionic hydrogels

This report exhibits our attempt to discover a membrane-free desalination approach using ionic hydrogels. Ionic hydrogels (cross-linked polyelectrolyte network) will swell in contact with water or brackish water, and an uneven distribution of salt ions within and out of the gels will be resulted in,...

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Main Author: Xiong, Wei.
Other Authors: Hu Xiao
Format: Final Year Project
Language:English
Published: 2013
Subjects:
Online Access:http://hdl.handle.net/10356/52095
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-520952023-03-04T15:32:32Z Membrane-free desalination using ionic hydrogels Xiong, Wei. Hu Xiao School of Materials Science and Engineering DRNTU::Engineering This report exhibits our attempt to discover a membrane-free desalination approach using ionic hydrogels. Ionic hydrogels (cross-linked polyelectrolyte network) will swell in contact with water or brackish water, and an uneven distribution of salt ions within and out of the gels will be resulted in, i.e. the mobile ion concentration of the inner solution will be lower than that of the external solution. Therefore, desalination was achieved by the incorporation of salt depleted water into ionic hydrogels and the subsequent dewatering. The influence of different types of monomers, initial monomer concentration, degree of cross-linking, gel particle size and concentration of salt solution on the desalination process were studied. Possible optimum conditions for the desalination by using polyelectrolyte hydrogels are discussed. The attempt to incorporate thermally responsive properties for dewatering with low energy consumption and high water recovery compared with mechanical dewatering method is described in the report as well. Bachelor of Engineering (Materials Engineering) 2013-04-22T07:15:28Z 2013-04-22T07:15:28Z 2013 2013 Final Year Project (FYP) http://hdl.handle.net/10356/52095 en Nanyang Technological University 45 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering
spellingShingle DRNTU::Engineering
Xiong, Wei.
Membrane-free desalination using ionic hydrogels
description This report exhibits our attempt to discover a membrane-free desalination approach using ionic hydrogels. Ionic hydrogels (cross-linked polyelectrolyte network) will swell in contact with water or brackish water, and an uneven distribution of salt ions within and out of the gels will be resulted in, i.e. the mobile ion concentration of the inner solution will be lower than that of the external solution. Therefore, desalination was achieved by the incorporation of salt depleted water into ionic hydrogels and the subsequent dewatering. The influence of different types of monomers, initial monomer concentration, degree of cross-linking, gel particle size and concentration of salt solution on the desalination process were studied. Possible optimum conditions for the desalination by using polyelectrolyte hydrogels are discussed. The attempt to incorporate thermally responsive properties for dewatering with low energy consumption and high water recovery compared with mechanical dewatering method is described in the report as well.
author2 Hu Xiao
author_facet Hu Xiao
Xiong, Wei.
format Final Year Project
author Xiong, Wei.
author_sort Xiong, Wei.
title Membrane-free desalination using ionic hydrogels
title_short Membrane-free desalination using ionic hydrogels
title_full Membrane-free desalination using ionic hydrogels
title_fullStr Membrane-free desalination using ionic hydrogels
title_full_unstemmed Membrane-free desalination using ionic hydrogels
title_sort membrane-free desalination using ionic hydrogels
publishDate 2013
url http://hdl.handle.net/10356/52095
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