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Our previous study indicated the existence of some low molecular weight contaminants in separated fractions (F1 to F4) of alkaline-oxygen stage waste liquor by spectroscopic analysis. In the present study, the quantities of these compounds were determined by capillary electropheresis (CE). Substantial amounts of oxalate and acetate were found in F3. The complexes between Al and oxalate as well as...
We characterized the lignin fragments in the alkaline oxygen delignification-stage waste liquor from a pulp and paper mill as a soil-conditioning agent. Chemical reactions of this lignin fragment should be very similar to those of alkaline-oxygen treatment of kraft lignin. Alkaline oxygen delignification-stage waste liquor was subjected to gel filtration chromatography and four different molecular...
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