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High flux water purification using aluminium hydroxide hydrate gels
Filtration of aqueous liquids has wide implications, for example for provision of clean drinking water. Nevertheless, many people still lack access to safe water and suffer from preventable water-borne microbial diseases. This study reports a new ultrafiltration-range separation technology using a g...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5727224/ https://www.ncbi.nlm.nih.gov/pubmed/29234081 http://dx.doi.org/10.1038/s41598-017-17741-z |
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author | Malekizadeh, Ali Schenk, Peer M. |
author_facet | Malekizadeh, Ali Schenk, Peer M. |
author_sort | Malekizadeh, Ali |
collection | PubMed |
description | Filtration of aqueous liquids has wide implications, for example for provision of clean drinking water. Nevertheless, many people still lack access to safe water and suffer from preventable water-borne microbial diseases. This study reports a new ultrafiltration-range separation technology using a gelatinous layer of aluminium hydroxide polyhydrate as a secondary membrane on a retaining fabric that enables simple and cost-effective production of filtered water. Properties include at least 4-fold higher flux rates than currently available membranes, pressure-resistance, impenetrability to filtered particles, easy cleaning by backwashing and simple, cost-effective replacement by gel injection. Depending on the substrate, filtration is achieved through a packed bed of 1–2 nm hydrate gel globules, partly by mechanical straining with a size exclusion of approx. 10 nm and partly by physical adsorption. As a result, filtration of water (e.g. turbid river water) contaminated with colloids and microorganisms, including viruses, yields clear water that is free of measurable particles or detectable microorganisms. However, small water-soluble molecules (salts, sugars, proteins) remain in the filtrate. The findings demonstrate the potential for wide applicability of hydrate gels in high-flux and low-cost water purification devices. |
format | Online Article Text |
id | pubmed-5727224 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-57272242017-12-13 High flux water purification using aluminium hydroxide hydrate gels Malekizadeh, Ali Schenk, Peer M. Sci Rep Article Filtration of aqueous liquids has wide implications, for example for provision of clean drinking water. Nevertheless, many people still lack access to safe water and suffer from preventable water-borne microbial diseases. This study reports a new ultrafiltration-range separation technology using a gelatinous layer of aluminium hydroxide polyhydrate as a secondary membrane on a retaining fabric that enables simple and cost-effective production of filtered water. Properties include at least 4-fold higher flux rates than currently available membranes, pressure-resistance, impenetrability to filtered particles, easy cleaning by backwashing and simple, cost-effective replacement by gel injection. Depending on the substrate, filtration is achieved through a packed bed of 1–2 nm hydrate gel globules, partly by mechanical straining with a size exclusion of approx. 10 nm and partly by physical adsorption. As a result, filtration of water (e.g. turbid river water) contaminated with colloids and microorganisms, including viruses, yields clear water that is free of measurable particles or detectable microorganisms. However, small water-soluble molecules (salts, sugars, proteins) remain in the filtrate. The findings demonstrate the potential for wide applicability of hydrate gels in high-flux and low-cost water purification devices. Nature Publishing Group UK 2017-12-12 /pmc/articles/PMC5727224/ /pubmed/29234081 http://dx.doi.org/10.1038/s41598-017-17741-z Text en © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Malekizadeh, Ali Schenk, Peer M. High flux water purification using aluminium hydroxide hydrate gels |
title | High flux water purification using aluminium hydroxide hydrate gels |
title_full | High flux water purification using aluminium hydroxide hydrate gels |
title_fullStr | High flux water purification using aluminium hydroxide hydrate gels |
title_full_unstemmed | High flux water purification using aluminium hydroxide hydrate gels |
title_short | High flux water purification using aluminium hydroxide hydrate gels |
title_sort | high flux water purification using aluminium hydroxide hydrate gels |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5727224/ https://www.ncbi.nlm.nih.gov/pubmed/29234081 http://dx.doi.org/10.1038/s41598-017-17741-z |
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