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Details van artikel 2 van 7 gevonden artikelen
| Titel: |
Reactions of Ozone with Dibenzo-p-dioxin and Dibenzofuran in Pulp |
| Auteur: |
Sonnenberg, Lucinda B. Dimmel, Donald R. |
| Verschenen in: |
Journal of wood chemistry and technology |
| Paginering: | Jaargang 14 (1994) nr. 4 pagina's 527-537 |
| Jaar: |
1994-11-01 |
| Inhoud: |
Dibenzo-p-dioxin (DBD) and dibenzofuran (DBF) appear to be important precursors to chlorinated dioxins formed during chlorine bleaching of pulp. Reducing the concentration of the precursors prior to chlorination may reduce the formation of dioxins. The high reactivity of electrophilic chlorine with the precursors in pulp suggests that ozone, another electrophilic reagent, may effectively reduce precursor levels in pulp. The goal of this work was to find optimal conditions for ozone destruction of DBD and DBF in pulp. Very mild conditions were unsuccessful at removing DBD and DBF, however conditions of 2% ozone charge, high consistency and slow ozone delivery rates reduced DBD and DBF by 83% and 68%, respectively. In general, conditions which enhance delignification also enhanced precursor degradation. Exposure of pulp to ozone prior to chlorination may remove enough DBD and DBF to significantly reduce chlorinated dioxin formation with chlorine bleaching. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 2 van 7 gevonden artikelen
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