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| | Wood pulp - Wikipedia, the free encyclopedia |
 | | The mechanical pulps tend to turn yellow in time, because of the binding material, lignin, in the pulp. |
 | | Research is under way to develop biological pulping, similar to chemical pulping but using certain species of fungi that are able to break down the unwanted lignin, but not the cellulose fibres. |
 | | When the paper is bleached with elemental chlorine, byproducts such as chlorinated compounds such as dioxins and furans are formed, and in high pulping areas such as British Columbia, high concentrations of these contaminates led to the closures of some fisheries in 1992. |
| en.wikipedia.org /wiki/Wood_pulp (1079 words) |
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