化工进展Issue(1)：308-313,6.DOI:10.16085/j.issn.1000-6613.2016.01.042
双氰胺甲醛改性脱色剂的合成及在模拟染料废水中的应用
Synthesis of a novel modified decolorant and its application in the treatment of simulated dyestuff wastewater
摘要
Abstract
A novel cationic decolorant was synthesized by using dicyandiamide and formaldehyde as the main raw material,modified by urea and melamine. The flocculation ability of the polycondensate was studied by the flocculating sedimentation experiment in the simulated dyestuff wastewater that used acid red 18. Effects of material molar ratio,reaction time and reaction temperature on the performance of decolorant were studied by the single factor experiments. Mixed usage with polymeric aluminium chloride was also investigated. The infrared spectrogram showed that the product is the modified compound. The results showed that the modified decolorant had a better performance than the unmodification decolorant. The optimum conditions are that reaction temperature is 80℃,reaction time is 3h and the molar ratio of dicyandiamide to formaldehyde to ammonium chloride to urea to melamine is 1∶3.5∶0.75∶0.13∶0.03. When the best dosage of modified decolorant is 120mg/L,the decolorization rate is 94.6%. PAC is used alone with the optimal dosage of 60mg/L,the decolorization rate is only 57.6%. When the modified decolorant mixed with PAC which dosage is unchanged,the dosage of the modified decolorant is 80mg/L the decoloring rate reached 94.8%. The mixed usage of the modified decolorant and PAC not only benefit the decoloration efficiency but also reduce the dosage of the modified decolorant that made the processing cost reduced.关键词
双氰胺/改性/合成/沉降/混凝Key words
dicyandiamide/modification/synthesis/sedimentation/coagulation分类
资源环境引用本文复制引用
耿仁勇,吕雪川,李国轲,焦玉娟,高肖汉,李法云..双氰胺甲醛改性脱色剂的合成及在模拟染料废水中的应用[J].化工进展,2016,(1):308-313,6.基金项目
国家自然科学青年基金项目（21003069，21103078）。 （）
