| Autor: |
REMMEN, Kirsten, SCHAFER, Roman, HENGEVOSS, Dirk, HUGI, Christoph, WINTGENS, Thomas, LENZ, Markus |
| Jazyk: |
angličtina |
| Rok vydání: |
2017 |
| Předmět: |
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| Popis: |
The recovery of resources from waste streams is becoming more and more important. Industries are aiming increasingly at zero‐liquid‐discharge and circular economy solutions. Nanofiltration (NF) is a well‐known separation technique and applied in many sectors such as food and pharma industry. Recently, NF has become attractive for resource recovery applications. For instance, studies have shown that NF is a suitable technology for phosphorus recovery from sewage sludge. Acid resistant membranes, however, in combination with further purification steps (e.g. precipitation, liquid‐liquid extraction, sorption) offer options for selective recovery of critical raw materials from complex secondary sources. The particular advantage of NF lies in the selectivity towards monovalent and multivalentions. Previously, we demonstrated that acid resistant NF combined with liquid‐liquid extraction allows an effective recovery of indium (95%) from photovoltaic cell (CIGS) leachates. In this study the application of NF was expanded to the recovery of CRM (in particular Scandium) for large scale applications on promising complex waste streams. In addition to commercially available membranes, layer‐by‐layer (LbL) modified membranes were tested for scandium recovery. LbL‐modification can be used for tailoring the filtration properties of NF. A systematic study on the combined use of (LbL)‐NF with different pre‐/post‐treatment steps was conducted and initial recommendations on the use of acid resistant NF for the selective and efficient recovery of CRM from secondary sources derived. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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