改性双氰胺-甲醛树脂对再生水的脱色效果  

Decolorization Effect of Reclaimed Water by Modified Dicyandiamide-formaldehyde Resin

作　　者：王梦琪 田一梅[1] 李想[1] 马洪娜 李育宏[2] WANG Meng-qi;TIAN Yi-mei;LI Xiang;MA Hong-na;LI Yu-hong(School of Environmental Science and Engineering, Tianjin University, Tianjin 300350 , China;Tianjin Water Recycling Co. Ltd., Tianjin 300221 , China)

机构地区：[1]天津大学环境科学与工程学院,天津300350 [2]天津中水有限公司,天津300221

出　　处：《中国给水排水》2019年第5期82-87,共6页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2009ZX07317-005-01)

摘　　要：为了降低再生水的色度,通过正交试验的方法,以双氰胺-甲醛树脂为主体,分别以硫酸1+1(由1份浓硫酸与1份纯水制成)和氯化铵为改性剂制备改性双氰胺-甲醛脱色剂,并筛选最优脱色剂。结果表明,经氯化铵改性的双氰胺-甲醛脱色剂对再生水的脱色效果更好,且在双氰胺∶甲醛∶氯化铵∶水为1∶2. 3∶1∶4. 4(物质的量之比)、温度为70℃、反应时间为3 h条件下制备的脱色剂的脱色效果最好。采用该脱色剂进行中试,脱色效果良好,在进水染料浓度为20mg/L的条件下,沉淀池出水浓度在8 mg/L以下,脱色率超过60%。Two groups of modified dicyandiamide-formaldehyde decolorizers were prepared in order to reduce the chromaticity of reclaimed water, through orthogonal test with dicyandiamide-formaldehyde resin as the main body and sulfuric acid 1+1( consisting of 1 part concentrated sulfuric acid and 1 part pure water) and ammonium chloride as the modifier. Meanwhile, optimal decolorizer was selected. The results indicated that the decolorization effect of dicyandiamide-formaldehyde decolorizer modified by ammonium chloride was better, and the best decolorization effect was achieved when the mole ratio of dicyandiamide : formaldehyde : ammonium chloride : water was 1:2. 3:1 -4.4, reaction temperature was 70 ℃ and reaction time was 3 hours. The decolorizer was used in a pilot test and good decolorization effect was realized. Under the condition of influent dye concentration of 20 mg/L, the effluent concentration was below 8 mg/L, and the decolorization rate was over 60%.

关 键 词：再生水 絮凝脱色 氯化鞍 双氨胺-甲醛树脂 

分 类 号：TU992.3[建筑科学—市政工程]