摘要
针对活性染料染色工艺流程长,能耗水耗高和有色废水排放量大等问题,使用有色废水处理剂对活性染料染色织物进行低温快速皂洗并实现循环染色。以模拟废水和染液为研究对象,脱色率为评价指标,探究了染色废水处理工艺。通过测试染料竭染率、固色率和染色织物部分颜色参数证实了染色废水循环染色的可行性。结果表明:0.07 g/L的C.I.活性红218模拟废水适宜的处理条件是3%废水处理剂,85℃处理15 min,在此条件下染色废水脱色率高达99.1%;与常规染色相比,利用处理后的废水进行循环染色,可提高活性染料上染百分率,染色织物颜色偏深;染色时,染料上染百分率和固色率随循环次数增加呈现增大的趋势。使用该方式染色既能实现有色废水高效处理,又能实现无机盐重复利用,符合低碳环保要求。
Objective Reactive dyeing is known for its complex dyeing process,high energy and water consumption,and large discharge of colored wastewater,which seriously restricts the transformation and upgrading of the printing process.As an effort to reach"emission peak and carbon neutrality",the development of reactive dye cyclic dyeing with energy saving and emission reduction advantages is conducive to promoting the green and low-carbon production in the printing and dyeing industry.Method The treatment agent contains compounds with bleaching and oxidizing functions.This wastewater treatment agent was selected for dyeing fabric soaping,realizing the low temperature fast soaping of dyeing fabric and recycling of dyeing wastewater.Taking a type of simulated wastewater as the research object and absorbance as the evaluation index,the treatment and reuse process of wastewater was explored.The feasibility of cyclic dyeing was verified by the determination of dye exhaustion rate,fixation rate and color parameters of dyed fabric.Results The results showed that the decolorization rate of dye solution increased with the increase of temperature,and the higher the temperature the shorter the treatment time(Fig.2).Under the same treatment time,the higher the treatment agent concentration,the higher the decolorization rate of dye solution,indicating that increasing the concentration of treatment agent was conducive to reducing the number of dye molecules in the waste liquid.In addition,it was found that the same effect could be achieved by prolonging the treatment time when the concentration of treatment agent was low(Fig.3).When the treatment time was 5 min,the decolorization rate of dye solution with 20 g/L of NaCl was up to 64.7%,which was 21.9%higher than that of without NaCl.Further increasing NaCl concentration to 50 g/L had no significant effect on the decolorization rate of dye solution.Further extending the treatment time to 30 min,NaCl showed little effect on decolorization rate of dye solution(Fig.6).After treatment at 85℃for 15 min,the maximum absorption wavelength in the visible region disappeared,and the decolorization rate of the dye solution was as high as 99.1%(Fig.7).When the reactive dye was dyed with recycled water,the dye percentage in the first 30 min was 9.0%-13.9%higher than that of the deionized water at the same time.Increasing the number of dyeing cycles did not change the overall trend of dyeing rate curve(Fig.8).Compared with the color parameters of the fabric dyed by deionized water,the color of the fabric dyed by cycle was darker,the red and blue light were weakened(Tab.1).Conclusion The treatment agent of 3%,the temperature of 85℃and the time of 15 min were appropriate for dealing with 0.07 g/L of C.I.Reactive Red 218 simulated wastewater.The decolorization rate of dyeing wastewater is up to 99.1%after 15 min treatment.Under the same treatment process,the acid condition has the best treatment effect,the neutral condition is the next,and the alkaline condition is the worst.Compared with deionized water,the percentage of reactive dye increased with the extension of dyeing time.During cyclic dyeing,reactive dyes have higher dye exhaustion and fixation rate,and the dyed fabric is darker,and the red and blue light are weakened.This method not only realizes the efficient treatment of dyeing wastewater,but also realizes the reuse of inorganic salts in dyeing residue,which is conducive to energy saving and emission reduction.
作者
韩博
王玉霖
舒大武
王涛
安芳芳
单巨川
HAN Bo;WANG Yulin;SHU Dawu;WANG Tao;AN Fangfang;SHAN Juchuan(College of Textile and Garments,Hebei University of Science and Technology,Shijiazhuang,Hebei 050018,China;Zibo Molinhui New Material Co.,Ltd.,Zibo,Shandong 255000,China;Hebei Emergency Protective Fabric Industrial Technology Research Institute,Xingtai,Hebei 055550,China)
出处
《纺织学报》
EI
CAS
CSCD
北大核心
2023年第8期151-157,共7页
Journal of Textile Research
基金
河北省青年科学基金项目(B2020208061)
河北省教育厅基金项目(QN2023090)。
关键词
活性染料
循环染色
废水处理
脱色率
节能减排
reactive dye
cyclic dyeing
wastewater treatment
decolorization rate
energy saving and emission reduction
