纳米零价铁-微纤化纤维素复合材料的制备及在造纸废水深度处理中的应用

Preparation of Nano Zero-valent Iron-microfibrillated Cellulose and Its Application in Papermaking Wastewater Advanced Treatment

关键词:  纳米零价铁-微纤化纤维素  造纸废水  深度处理

Key Words:nano zero-valent iron-microfibrillated cellulose  papermaking wastewater  advanced treatment

摘要:以微纤化纤维素作为天然高分子载体,通过原位液相化学还原反应负载零价铁制备得到了纳米零价铁-微纤化纤维素(NZVI-MFC)复合材料。通过红外光谱(FT-IR)、透射电镜(TEM)、X射线衍射(XRD)和热重分析仪(TGA)来表征NZVI-MFC复合材料并研究其耐热性能,同时,将NZVI-MFC复合材料应用于造纸废水深度处理,探讨了NZVI-MFC复合材料添加量和废水初始pH值对废水处理效果的影响。结果表明,NZVI通过原位化学反应均匀负载到MFC基材上,在废水深度处理最佳条件下,造纸废水的COD_Cr和色度总去除率分别达到78.4%和90.7%。

Abstract:Microfibrillated cellulose(MFC),as a natural matrix, can be used by in-situ chemical reaction to prepare nano zero-value Iron-microfibrillated cellulose (NZVI-MFC) composite material. The characteristies of NZVI-MFC composite materials and its heat resistance properties were investigated by infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), X-ray diffraction (XRD) and thermal gravimetric analysis (TGA). In order to explore the possible application of NZVI-MFC in papermaking wastewater advanced treatment, the effects of dosages of NZVI-MFC composite materials, initial pH value of the wastewater on wastewater treatment were studied. The research results indicated that NZVI dispersed on the MFC matrix uniformly, under the optimal treatment conditions, the removal rates of COD_Cr and chroma were 78.4% and 90.7%, respectively.