Application of TAML® catalysts to remove colour from pulp and paper mill effluents
| Autor: | K.G. Wingate, T. R. Stuthridge, Colin P. Horwitz, Terrence J. Collins, L.J. Wright |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Environmental Engineering
Bleach Waste management business.industry Pulp (paper) Chemical oxygen demand Paper mill engineering.material Pulp and paper industry complex mixtures Peroxide chemistry.chemical_compound chemistry engineering business Hydrogen peroxide Effluent Water Science and Technology Waste disposal |
| Zdroj: | Water Science and Technology. 49:255-260 |
| ISSN: | 1996-9732 0273-1223 |
| DOI: | 10.2166/wst.2004.0277 |
| Popis: | A TAML® catalyst (0.5 μM, 0.23 mg/L of effluent) combined with hydrogen peroxide (6.5 mM, 0.19 g/L of effluent) were capable of permanently removing 46% of the colour from bleach plant effluent (Eop, pine-derived) in one hour at 5,000 L effluent per day. Increasing concentrations to 2 μM catalyst (0.9 mg/L of effluent) and 22 mM peroxide (0.75 g/L of effluent), resulted in removal of 78% of the colour. In addition, 29% of the chlorinated organic material (AOX) was also removed. A laboratory investigation indicated that the oxidative process predominantly removed phenolic structures. The low aromatic content of the effluent meant that the majority of the organic material was not substantially altered during treatment. Thus chemical oxygen demand was essentially unchanged. This technology was able to remediate colour from effluents derived from both softwood (pine) and hardwood (eucalypt). Laboratory studies on catalyst life-time during effluent treatment, demonstrated that activity was maintained for a sufficient period to eliminate all the chromophore available to the active species, but that the catalyst did not survive long enough to be discharged into the receiving environment. Microtox tests showed that catalyst degradation products were not toxic to the receiving environment. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|