Evaluation of the fouling resistance of methyl grafted ceramic membranes for inorganic foulants and co-effects of organic foulants
| Autor: | Vera Meynen, Ghulam Mustafa, Anita Buekenhoudt, Kenny Wyns, Siebe Janssens |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Fouling
Chemistry Inorganic chemistry Membrane fouling Filtration and Separation 02 engineering and technology 010501 environmental sciences 021001 nanoscience & nanotechnology Grafting 01 natural sciences Analytical Chemistry Biofouling Membrane visual_art Reagent visual_art.visual_art_medium Nanofiltration Ceramic 0210 nano-technology 0105 earth and related environmental sciences |
| Zdroj: | Separation and purification technology |
| ISSN: | 1383-5866 |
| Popis: | The application of NF membranes is still a big challenge because of both organic and inorganic fouling. In our previous studies, we have clearly shown that grafting of TiO2 NF membranes with organic groups, and especially grafting with methyl groups using Grignard reagents, leads to a strong antifouling effect for different organic materials. In this paper, we study the irreversible fouling of inorganic foulants such as iron and manganese hydroxides/oxides/salts (scaling) of native and grafted ceramic NF membranes. In addition, the influence of the presence of organics on inorganic fouling and co-effects of multiple organic materials (e.g. humic acids and alginate) on the fouling were also measured. As a final test, the potential of the surface grafted ceramic NF membranes is also evaluated in real surface water, where many different foulants are present simultaneously. In all cases, the strong antifouling effect of methyl Grignard grafting is confirmed. For the investigated membranes with varying amount of polar surface groups, humic acids decrease the fouling tendency of alginate, and calcium or iron ions decrease the fouling tendency of alginate and humic acids. All obtained results can be properly explained by considering the physico-chemical properties of the investigated membranes and model foulants. |
| Databáze: | OpenAIRE |
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