PVP-DDF絮凝剂制备及其染料脱色性能  

Preparation of PVP-DDF flocculant and its dye decolorization performance

作　　者：程雪荣 张洛红[1] 王佳 王瑜[1] 周梦圆 赵鑫 CHENG Xuerong;ZHANG Luohong;WANG Jia;WANG Yu;ZHOU Mengyuan;ZHAO Xin(School of Environmental and Chemical Engineering/Xi’an Key Laboratory of Textile ChemicalEngineering Auxiliaries, Xi’an Polytechnic University, Xi’an 710048, China;Xi’an Yunkai Environmental Technology Co. Ltd,Xi’an 711700,China)

机构地区：[1]西安工程大学环境与化学工程学院/西安市纺织化工助剂重点实验室,陕西西安710048 [2]西安云开环境科技有限公司,陕西西安711700

出　　处：《西安工程大学学报》2022年第3期1-8,共8页Journal of Xi’an Polytechnic University

基　　金：陕西省重点研发计划项目(2022GY-161);国家级大学生创新创业训练计划项目(202110709008)。

摘　　要：针对阳离子絮凝剂双氰胺甲醛(DDF)处理阴离子染料废水时生成絮体小,出水浊度高,常用改性DDF方法操作工艺复杂且耗时长的问题,通过微波法,以聚乙烯吡咯烷酮(PVP)为接枝物,DDF为基体,硝酸铈铵(CAN)为引发剂,制备可快速接枝且分子量大的PVP-DDF絮凝剂。分析不同DDF、CAN投加量条件下制备的絮凝剂去除刚果红、活性嫩黄K-6G、酸性兰9等染料的效果。结果显示:当PVP∶CAN∶DDF的质量比在1∶0.3∶15时,絮凝剂脱色性能最优。此条件下,PVP-DDF絮凝剂对质量浓度为20 mg/L的刚果红、活性嫩黄K-6G和酸性兰9模拟印染废水的脱色率分别为94.93%、91.12%和85.87%;浊度值分别低至5.94、5.94、5.74 NTU。PVP-DDF絮凝剂分子量较大,对阴离子染料废水脱色效果好,可有效降低出水浊度。To solve the problems that cationic flocculant dicyandiamide formaldehyde(DDF)has small floc,high turbidity of effluent and complicated and time-consuming operation process of ordinary modified DDF method when treating anionic dye wastewater,a kind of PVP-DDF flocculant with high molecular weight which can be grafted quickly was prepared by microwave method with polyvinylpyrrolidone(PVP)as graft,DDF as matrix and ceric ammonium nitrate(CAN)as initiator.The removal effects of congo red,reactive brilliant yellow K-6G and acid blue 9 by flocculants prepared under different dosage of DDF and CAN were analyzed.The results show that when the mass ratio of PVP∶CAN∶DDF was 1∶0.3∶15,the decolorization performance of flocculants was the best.Under the optimum conditions,the decolorization rates of Congo red,reactive brilliant yellow K-6G and acid blue 9 simulated printing and dyeing wastewater with concentration of 20 mg/L by PVP-DDF flocculant were 94.93%,91.12%and 85.87%respectively.The turbidity values are as low as 5.94 NTU,5.94 NTU and 5.74 NTU,respectively.PVP-DDF flocculant has a large molecular weight,has a good decolorization effect on anionic dye wastewater,and can effectively reduce the turbidity of effluent.

关 键 词：阴离子染料脱色 双氰胺甲醛 聚乙烯吡咯烷酮 絮凝剂 接枝改性 

分 类 号：TS190.3[轻工技术与工程—纺织化学与染整工程] X791[轻工技术与工程—纺织科学与工程]