Removal of sulfide-bound copper from white wine by membrane filtration
| Autor: | Agnieszka Mierczynska-Vasilev, Anque Guo, Eric Wilkes, Paul A. Smith, Geoffrey R. Scollary, Andrew C. Clark, Nikolaos Kontoudakis |
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| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Wine chemistry.chemical_classification Sulfide Hydrogen sulfide Inorganic chemistry food and beverages chemistry.chemical_element 04 agricultural and veterinary sciences Horticulture 01 natural sciences Copper Sodium sulfide law.invention chemistry.chemical_compound Copper sulfide Membrane chemistry law 0405 other agricultural sciences Filtration 010606 plant biology & botany 040502 food science |
| Zdroj: | Australian Journal of Grape and Wine Research. 25:53-61 |
| ISSN: | 1322-7130 |
| DOI: | 10.1111/ajgw.12360 |
| Popis: | Background and Aims Sulfide‐bound copper (Cu) in wine may act as a potential source of hydrogen sulfide. The aim of this study was to understand how the white wine matrix can influence the filterability of sulfide‐bound Cu. Methods and Results Sulfide‐bound Cu was formed in situ with addition of copper(II) sulfate and sodium sulfide to white wine and model wines. The amount of subsequent Cu passing through membrane filters was measured by flame atomic absorption spectroscopy or inductively coupled plasma with optical emission spectroscopy. Nanoparticle tracking analysis was utilised to measure the size of particles generated after copper(II) and sulfide addition. The majority of the particles were around or below 0.2 μm, and polyethersulfone and nylon membranes remove up to 40–90% of sulfide‐bound Cu from white wine. The regenerated cellulose, Teflon and glass fibre membranes removed minimal sulfide‐bound Cu. Conclusions Membrane filtration removed sulfide‐bound Cu by adsorption rather than by particle size discrimination. Polysaccharides and proteins were the components of white wine that most inhibited adsorption. Significance of the Study The addition of copper(II) to wine with hydrogen sulfide results in products that cannot be removed by filtration on the basis of their particle size but instead may be partly removed by adsorption onto membrane filters to an extent impacted by the wine composition and the filtration medium. |
| Databáze: | OpenAIRE |
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