Concurrent Removal of Selenium and Arsenic from Water Using Polyhedral Oligomeric Silsesquioxane (POSS)–Polyamide Thin-Film Nanocomposite Nanofiltration Membranes
| Autor: | Yingran He, Yu Pan Tang, Tai-Shung Chung |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Aqueous solution Nanocomposite General Chemical Engineering chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Industrial and Manufacturing Engineering Silsesquioxane 0104 chemical sciences chemistry.chemical_compound Membrane chemistry Chemical engineering Thin-film composite membrane Organic chemistry Nanofiltration 0210 nano-technology Arsenic Selenium |
| Zdroj: | Industrial & Engineering Chemistry Research. 55:12929-12938 |
| ISSN: | 1520-5045 0888-5885 |
| Popis: | With stringent regulations regarding the toxic ions selenium and arsenic on wastewater discharge, various industries such as coal mining and power generation are demanding more efficient and effective treatment methods to remove these two ions. Since the performance of commercially available thin film composite nanofiltration (NF) membranes reported so far has a great room for improvement, a thin-film nanocomposite (TFN) NF membrane comprising polyhedral oligomeric silsesquioxane (POSS) with high efficiency was developed for the concurrent removal of selenium and arsenic from aqueous solutions. The resultant NF membrane has a mean effective pore diameter of 0.65 nm, a molecular weight cutoff of 302 Da, and superior pure water permeability of 5.4 LMH/bar with notably high rejections of SeO32–, SeO42–, and HAsO42– toward 93.9%, 96.5%, and 97.4%, respectively. The TFN membranes also exhibit slightly higher rejection performance when a mixed ion solution separation test was conducted. To the best of our knowl... |
| Databáze: | OpenAIRE |
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