【摘要】 <正> 目前使用氯和含氯漂白剂漂白的废水对环境有严重污染,采用臭氧、氧气与过氧化氢等含氧漂白剂,漂后废水可供筛选、洗浆然后送碱回收,可消除污染危害,因而成为纸浆漂白发展的重要方面。 近年来臭氧漂白纸浆的研究越来越受到重视。某些研究表明:臭氧的氧化电位较高(约更多还原

【Abstract】 Besides other advantages, ozone bleaching is pollution-free. Conditions of ozone bleaching of Chinese Southern pine (pinus massoniana lamb) kraft pulp and sulfite pulp of bagasse and other non-wood fibers were studied.Results obtained showed that favourable consistency is 40-50% for southern pine kraft pulp and 45-55% for sulfite pulp. Efficiency of multi-stage bleaching is higher than that of single stage. Bleaching at low temperature or room temperature gave better results than that at high temperature, as ozone tended to decompose at high temperatures. Exposed fibrils may be seen on the surface of ozonized fibers of southern pine kraft pulp through SEM observation.更多还原