两性木质素絮凝剂的制备及脱色性能研究  

Preparation of an amphoteric lignin flocculant and its decolorization performance research

作　　者：刘千钧[1] 刘明华[2] 詹怀宇[3] 刘梦茹[3] 

机构地区：[1]广东工业大学环境科学与工程学院,广东广州510090 [2]福州大学环境与资源学院,福建福州350002 [3]华南理工大学制浆造纸工程国家重点实验室,广东广州510641

出　　处：《福州大学学报（自然科学版）》2007年第1期152-156,共5页Journal of Fuzhou University(Natural Science Edition)

基　　金：广东省教育厅自然科学基金资助项目(Z03023);广东工业大学校博士启动基金资助项目(053010);福建省南平市科技局资助项目(N2004Z08)

摘　　要：木素磺酸钙与丙烯酰胺接枝共聚物通过Mannich反应,得到两性木素絮凝剂LSM.由正交实验得到Mannich反应较佳条件为:醛胺比1∶1,反应温度50℃,反应时间2.0 h,在此条件下LSM具有较佳的脱色性能.并将LSM用于活性艳蓝X-BR、活性黄X-R、活性紫K-3R、活性黑K-BR、直接橙S等多种模拟染料废水的脱色处理,讨论了LSM投加量和溶液pH值对不同染料脱色效果的影响.实验结果说明,LSM对各染料有较好的脱色效果,脱色率均在82%以上.同时投加量增加可能引起废水CODcr的提高,需控制适当的投加量范围.The modified lignin flocculant, denoted as LSM, was prepared by the M .annich reaction of calcium lignosulphonate - acryamide graft copolymer. And, the orthogonal experiments were conducted to optimize the Mannich reaction conditions. The satisfactory conditions included 1 ： 1 of molar ration of formaldehyde and dimethylamine, 50℃ of the reaction temperature and 3 h of the reaction time. Additionally, the decolorizing performance of LSM was studied by decolorizing of various simulating dye effluents, e.g. , reactive blue X - BR, reactive yellow X - R, reactive violet K - 3R, reactive black K - BR and direct orange S. The effect factors, i. e. , flocculant dosage and solution pH, were also discussed. LSM was proved to treat the simulating dyeing effluents etticiently. The decoloraization percentage could reach over 82%. Nevertheless, excessive addition of LSM could cause increase of CODCr in the simulating dye effluents. Consequently, the LSM dosage should be limited to a permissible dosage that could not cause second pollution.

关 键 词：木质素 改性 两性絮凝剂 脱色 

分 类 号：TS79[轻工技术与工程—制浆造纸工程]