木质素基两性絮凝剂的制备及其用于模拟染料废水脱色处理的研究  

Study on preparation and application in decolorizing simulative dyeing wastewater of amphoteric lignin-based flocculant

作　　者：顾玲[1] 马宇锋[1] 

机构地区：[1]陕西科技大学化学与化工学院,陕西西安710021

出　　处：《应用化工》2009年第1期87-89,94,共4页Applied Chemical Industry

摘　　要：以木质素磺酸钙为原料,通过与丙烯酰胺接枝共聚、阳离子化改性,制备了一种木质素基两性絮凝剂LSM,研究了醛胺比、反应温度、反应时间等因素对阳离子化反应的影响;将LSM用于活性艳蓝X-BR、活性黄X-R、活性紫K-3R、活性黑K-BR等4种模拟染料废水的脱色处理,研究了投加量、废水pH对LSM脱色效果的影响以及LSM投加量对废水CODcr的影响。结果表明:当醛胺比为1∶1,羟甲基化反应温度为50℃,反应时间为1.0 h,胺甲基化反应温度为50℃,反应时间为2.0 h时,所得LSM具有较佳的脱色性能;LSM对各模拟染料废水的脱色率均在82%以上,但投加量的增加会引起CODcr的提高,在实际使用中需将投加量控制在适当的范围内。The amphoteric lignin-based flocculant（LSM） was synthesized through graft acrylamide to calcium lignosulphonate and cationizing modification,influence of molar ratio of formaldehyde to dimethylamine, reaction temperature, reaction time on cationizing reaction were studied. The LSM was used to decolor vari- ous simulating dye effluents, e. g. , reactive blue X-BR, reactive yellow X-R, reactive violet K-3R, reactive black K-BR,influence of dosage of LSM, pH of waste water on the deeolorizing effect of LSM and the influence of the dosage of LSM on the CODcr of the waste water were studied. The results shows that LSM has good decoloration performance under the condition that molar ratio of formaldehyde to dimethylamine is 1 ： 1, 01 =50 ℃ ,tI = 1.0 h,02 =50 ℃ ,t2 =2.0 h. The decoloration rate of LSM to the four kinds of simulative dyeing wastewater are all above 82% ,but the CODe, of the waste water will increase while the dosage of LSM increased, so the dosage of LSM should be controlled in proper range in practical use.

关 键 词：木质素磺酸钙 两性絮凝剂 染料废水 脱色 制备 

分 类 号：O463[机械工程—光学工程]