柚皮纤维素制备两性重金属离子去除剂及其在电解锰废水处理中的应用

【作者】 傅伟昌；

【导师】 王继徽； 戴慧敏；

【作者基本信息】 湖南大学 ， 环境工程， 2002， 硕士

【摘要】 重金属离子废水的治理技术多种多样，其中以天然高分子物质改性而获得高效去除剂的研究日益受到人们的关注。本文以棉纤维为原料制备甜菜碱型两性化纤维素，探讨了两种制备途径的相关影响因素，研究了产物对Cr₂O₇^2-、Mn²⁺、Cu²⁺的吸附性能，实验表明产物确为甜菜碱型两性物质，可以同时吸附重金属类的阴、阳离子；同时对制备过程中的环氧化反应略有改进，使得环氧值为已有报道的两倍。本文还以柚皮纤维为原料，采用以棉纤维为原料制备产物时获得的制备条件来制备甜菜碱型两性化纤维素。实验表明，由于柚皮纤维素的结晶性不高，产物的功能基含量高于两性化棉纤维，可用于去除电解锰废水中的Cr₂O₇^2-、Mn²⁺，而且去除剂可再生后重复使用。本文结果用于柚类深加工皮渣的综合利用，既可减少废弃物量，又可治理重金属离子废水。更多还原

【Abstract】 There are kinds of heavy metal ions wastewater treatment technologies, but the research on modified natural macromdecule as a kind of heavy metal ions wastewater agent receives particular care from people. We prepared ampholytic cellulose with cotton fiber as primary material. In this paper some influence factors relative to two preparation methods were investigated and the product adsorbability to Cr2O72-, Mn2+, Cu2+ was studied. The experiment showed that the product was ampholytic material of betaine type and the product could adsorb heavy metal anion and cation. At the same time epoxidation was improved a bit in the course of preparation and epoxy value was two times higher than that being reported. We also prepared ampholytic cellulose with pomelo fiber as primary material, adopting the preparation condition of cotton fiber as primary material. The experimeat showed that because of pomelo fiber poor crystallinity, the product functional group content was higher than ampholytic cotton fiber, the product could get rid of Cr2O72-, Mn2+ in electrolysis Mn wastewater, and the treatment agent could be repeated use. The result can reduce wastes and treat heavy metal ions wastewater if it be used in the process of pomelo compositive utilization.更多还原