Mg(OH)_2引入方式对过氧化氢漂白废液中主要成分的影响  

Effect of Mg(OH)_2-Introducing Modes on the Components in the Effluents for Bleaching with Hydrogen Peroxide

作　　者：金慧君[1] 胡会超[1] 宋燕婷[1] 柴欣生[1] 

机构地区：[1]华南理工大学制浆造纸工程国家重点实验室,广东广州510640

出　　处：《造纸科学与技术》2013年第6期9-12,40,共5页Paper Science & Technology

基　　金：国家自然科学基金(21076091;21037001)项目

摘　　要：本文以桉木硫酸盐浆为原料,研究了氢氧化镁引入方式(NaOH,NaOH+Mg(OH)2、NaOH+MgSO4)对过氧化氢漂白废液中溶出木素、碳酸根、草酸根、甲醇含量的影响。研究结果表明:在相同目标卡伯值下,体系内直接生成氢氧化镁(NaOH+MgSO4)的漂白废液中溶解木素、草酸根含量比未添加镁和直接添加氢氧化镁两组低,而对碳酸根、甲醇的生成量则未产生显著影响,即显著降低了漂白废水的污染负荷(溶解木素等)及结垢阴离子的生成量(碳酸根+草酸根)。因此,本文认为漂白体系内直接生成氢氧化镁是氢氧化镁的最优引入方式。This paper reported an investigation on the effect of Mg（OH） 2-introducing modes on the components, i. e. , the dissolved lignin, methanol, carbonate, and oxalate in the effluents of the eucalyptus kraft pulp bleaching with hydrogen peroxide （H2O2 ）. There are three ways to introduce Mg（OH）2 into the bleaching system, i. e. , the direct-addition, or fresh-formed Mg（OH）2 by adding magnesium sulfate into a pulp slurry pre-mixed with sodium hydroxide, or vice verse. The results showed that at the given Kappa number, the amounts of dissolved lignin and oxalate in the effluents of the fresh-formed Mg（OH）2 systems were less than those in the directly adding Mg（OH）2 or Mg（OH）2-free system ; However, there were no significant differences for the amounts of methanol and carbonate generated in these system.

关 键 词：硫酸镁 氢氧化镁 过氧化氢漂白 纸浆 漂白废液 

分 类 号：TS745[轻工技术与工程—制浆造纸工程] TS749.1