生物材料在印染废水处理中的应用

发布时间：2018-01-01 14:06

本文关键词：生物材料在印染废水处理中的应用　出处：《苏州大学》2015年硕士论文　论文类型：学位论文

【摘要】：印染废水是纺织品在前处理、染色、印花和后整理过程中所排放出的废水,具有排放量大、水质复杂、生物可降解性差、COD值高等特点。常见的印染废水的处理方法包括包括物理化学法、化学法和生物法三类,每种方法都有其优势和不足之处。众所周知,生物材料具有独特的物理、化学、生物和优良的环境净化功能,并且其来源广泛并且再生能力很强,在实际生产生活中,很多生物材料是作为废弃物而被抛弃的,而当实现对生物材料的再利用可以节约资源和能源,为染整废水吸附处理提供一条新的途径。本论文主要研究三种生物材料(壳聚糖、蚕蛹粉和糠粉)对不同印染废水中染料的吸附性能,为了便于分析和总结生物材料对不同性质材料的吸附性能,本论文分别逐一使用活性染料、分散染料和酸性染料来模拟废水,重点讨论了吸附剂浓度、染料浓度、溶液p H值和吸附时间对生物材料吸附印染废水中染料的影响。从实验结果得知,对于活性蓝B-2GLN染料和酸性黄A-K印染废水,较低浓度的生物材料就能得到较高吸附去除率,而由于分散染料分子结构小,微溶于水,是非离子型染料,因而吸附去除效率相对低一些。一般情况,吸附时间控制在40~60min都能取得比较好的吸附效果,而p H值的影响主要是对于生物材料分子带电性的影响,一般情况在酸性条件下,吸附效果更佳。
[Abstract]:Printing and dyeing wastewater is a kind of textile wastewater discharged in the process of pretreatment, dyeing, printing and finishing, which has the characteristics of large discharge, complex water quality and poor biodegradability. The common treatment methods of printing and dyeing wastewater include physicochemical method, chemical method and biological method. Each method has its own advantages and disadvantages. Biomaterials have unique physical, chemical, biological and excellent environmental purification functions, and they have a wide range of sources and a strong ability to regenerate, in the actual production and life. Many biomaterials are discarded as wastes, and the reuse of biomaterials can save resources and energy. In this paper, three kinds of biomaterials (chitosan, silkworm pupa powder and bran powder) were used to study the adsorption properties of dyes in different printing and dyeing wastewater. In order to analyze and summarize the adsorption properties of biomaterials to different materials, reactive dyes, disperse dyes and acid dyes were used to simulate the wastewater one by one, and the concentration of adsorbent was discussed emphatically. The effects of dye concentration, pH value and adsorption time on the adsorption of dyes from dyeing wastewater by biomaterials were studied. The experimental results showed that the reactive blue B-2GLN dye and the acid yellow A-K dyeing wastewater were obtained. The lower concentration of biomaterials can get higher adsorption removal efficiency, but because of the small molecular structure of disperse dyes, slightly soluble in water, is a non-ionic dye, so the adsorption removal efficiency is relatively low. The adsorption time was controlled at 40 ~ 60 min and the adsorption effect was better, while the pH value mainly affected the charged property of biomaterials, generally in acidic condition. The adsorption effect is better.
【学位授予单位】：苏州大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X791;TQ424

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