Low-pressure reverse osmosis membrane separation of non-fluorinated and perfluorinated organic compounds in water
| Autor: | Shogo Taniguchi, Xiaming Chen, Hiroaki Ozaki, Rabindra Raj Giri, Ryohei Takanami |
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| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | Desalination and Water Treatment. 52:5796-5805 |
| ISSN: | 1944-3986 1944-3994 |
| DOI: | 10.1080/19443994.2013.815588 |
| Popis: | The purpose of this study is to compare retention characteristics of perfluorinated organic compounds (PFCs) and similar-structured non-fluorinated organic compounds (NFCs) by new generation low-pressure reverse osmosis (LPRO) membranes based on physicochemical properties of the compounds and the results of bench-scale membrane efficiency batch tests as the first-step screening. Molecular weight (MW), molecular size, and hydrophobicity of the compounds greatly influence their retentions by loose and low-desalting membranes than those by tight and high-desalting membranes. The retentions in general increased with increasing MW and molecular length (ML). The retentions are explained more reliably by using both MW and molecular width/height parameters. The roles of MW and ML on the retentions could not be differentiated, since MW increases almost linearly with ML. The NFCs are more easily rejected than the PFCs by the membranes most probably due to hydrophobic adsorption of the PFCs to membranes lead... |
| Databáze: | OpenAIRE |
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