A Model Compound Study: The Formation of Colored Metallic Extractive Complexes and Their Effect on the Brightness of Tmp Pulp |
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| Authors: | Y. Ni A. Ng M. Mosher |
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| Affiliation: | 1. Dr. Jack McKenzie Limerick Pulp and Paper Research and Education Centre University of New Brunswick , Fredericton, NB, E3B 6C2;2. Irving Paper Ltd. , Saint John, NB, E2L 4K9 |
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| Abstract: | Abstract Flavonoids, such as Quercetin, are the main polyphenol compounds found in extractives. When complexing with transition metal ions, these extractives may induce a significant discoloration to mechanical pulps. In this study, the effect of metallic extractive complexes was investigated using a model compound, Quercetin. It was confirmed that the complexes formed between some metal ions and Quercetin are strongly colored. However, most of the strong absorbance in visible light due to metallic Quercetin complexes, can be eliminated by the addition of diethylenetriaminepentaacetic acid (DTPA). The metal ions studied were Fe(III), Cu(II), Mn(II) and AI(III). |
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