双氰胺-甲醛聚合物阳离子印染废水脱色剂的合成及其应用

›› 2010, Vol. 10 ›› Issue (6): 1217-1221.

双氰胺-甲醛聚合物阳离子印染废水脱色剂的合成及其应用

张文艺刘明元罗鑫范培成李秋燕田少敏

常州大学环境与安全工程学院常州大学环境与安全工程学院常州大学环境与安全工程学院常州大学环境与安全工程学院常州大学环境与安全工程学院常州大学环境与安全工程学院

收稿日期:2010-10-12 修回日期:2010-12-16 出版日期:2010-12-20 发布日期:2010-12-20
通讯作者: 张文艺

Synthesis of Cationic Decoloring Agent of Dicyandiamide-Formaldehyde Polymer and Its Application in Dyeing Wastewater

ZHANG Wen-yi LIU Ming-yuan LUO Xin FAN Pei-cheng LI Qiu-yan TIAN Shao-min

School of Environmental & Safety Engineering, Changzhou University School of Environmental & Safety Engineering, Changzhou University School of Environmental & Safety Engineering, Changzhou University School of Environmental & Safety Engineering, Changzhou University School of Environmental & Safety Engineering, Changzhou University School of Environmental & Safety Engineering, Changzhou University

Received:2010-10-12 Revised:2010-12-16 Online:2010-12-20 Published:2010-12-20
Contact: ZHANG Wen-yi

摘要/Abstract

摘要： 合成出一种以双氰胺、甲醛为原料的阳离子印染废水高效有机脱色剂，考察了双氰胺、甲醛、硫酸铝用量和反应温度、反应时间等合成条件对双氰胺-甲醛聚合物脱色性能的影响. 结果表明，优化合成工艺条件为双氰胺:甲醛:硫酸铝=1:2.58:0.35(摩尔比)、80℃、反应3 h. 所制脱色剂对分散红167、BES蓝、分散蓝79三种典型染料废水的脱色率均达98%以上. 脱色机理主要包括吸附电中和作用、压缩双电层、吸附架桥、网捕作用. 将脱色剂应用于江苏省常州市马杭污水厂混合印染废水的处理，在pH 8、投加量17.5 mL/L的条件下，脱色率可达96%以上，出水色度从360倍降为10倍，达到GB 8978-1996一级A排放要求.

关键词: 印染废水, 脱色剂, 双氰胺, 甲醛

Abstract: A cationic organic decoloring agent for dyeing wastewater was synthesized by using dicyandiamide and formaldehyde. The effects of dosage of dicyandiamide, formaldehyde and aluminium sulphate, reaction temperature and reaction time were considered. The results showed that the optimum conditions were as flows: molar ratio of dicyandiamide to formaldehyde to aluminium sulphate was 1:2.58:0.35, reaction temperature 80℃, and reaction time 3 h. The decoloring agent synthesized under these conditions was used to decolorise three typical dyes in wastewater, Disperse Red 167, BSE blue and Disperse Blue 79, and the decolorization efficiency could be over 98%. The mechanism of decolorization was analyzed in charge neutralization, compressing the thickness of the electric double layer, bridging adsorption and network-bashing. The synthesized agent was also used in decoloring of mixed dyeing wastewater in Mahang Wastewater Treatment Plant. When pH value and decolorant dosage was 8 and 17.5 mL/L respectively, the decolorization efficiency was 96.7%, and the chroma decresed from 360 to 10 times, the effluent met the national discharge standard GB 8978.1A-1996.

Key words: dyeing wastewater, flocculating-decolorizing agent, dicyandiamide, ormaldehyde

中图分类号:

X506

张文艺刘明元罗鑫范培成李秋燕田少敏. 双氰胺-甲醛聚合物阳离子印染废水脱色剂的合成及其应用[J]. , 2010, 10(6): 1217-1221.

ZHANG Wen-yi LIU Ming-yuan LUO Xin FAN Pei-cheng LI Qiu-yan TIAN Shao-min. Synthesis of Cationic Decoloring Agent of Dicyandiamide-Formaldehyde Polymer and Its Application in Dyeing Wastewater[J]. , 2010, 10(6): 1217-1221.

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