Lignin-degrading bleaching All lignin-degrading bleaching chemicals are oxidants used primarily in chemical pulp bleaching. Among the most important types used in the past have been elemental chlorine (CI2) with its compounds chlorine dioxide (CIO2) and sodium hypochlorite (NaOCI). Since the 1980s, when the discussion on potentially harmful ecological effects of chlorine and hypochlorite began, there
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