摘要
染料废水处理是水污染治理中非常重要内容之一,针对染料废水带有极高的色度、可生化性差和含"三致"物等特点。本文采用水热法制备复合材料用于染料废水处理。通过XRD、TEM、SBET等表征手段证实制备材料为核-壳Fe3O4@SiO2-TiO2复合材料。将此材料用于染料废水处理,选用亚甲基蓝(Methylene Blue,简称MB)作为染料废水典型目标物,测定催化剂Ti:Si摩尔比、催化剂用量、染料溶液pH值和催化剂重复利用对染料废水降解效果影响。研究结果表明,染料废水浓度为14mg/L,双氧水用量为2mL,催化剂用量为2g/L,脱色90min时,溶液脱色率能达到98.6%。催化剂重复使用4次,其脱色效果仍然保持在90%左右。由此可见,用此方法制备的核-壳材料是比较有效且实用的一种染料废水处理非均相Fenton催化剂。
Dyestuff textile wastewater treatment has become a research hotspot due to it ’s high chroma ,poor biodegradability ,and low toxicity characteristics .In this paper ,we have synthesized composite materials by hydrothermal methods .Core-shell Fe3 O4@ SiO2 -TiO2 materials were characterized by XRD ,TEM and so on .This materials have been applied to dye wastewater treatment . Methylene blue was used as typical target of dye wastewater .Degradation effects of dye wastewater were determined by catalyst with different Ti :Si molar ratios ,amount of catalyst ,pH value of the dye solution and catalyst reuse . A serious of results of study show that decolorization ratios of dye wastewater arrived at 98 .6% under optimal conditions .When catalysts were reused for 4 times ,it’s decolorization ratios were maintained at about 90% . Therefore , this materials synthesized by this methods is an effective and practical dye wastewater treatment catalysts .
出处
《内蒙古工业大学学报(自然科学版)》
2014年第1期25-31,共7页
Journal of Inner Mongolia University of Technology:Natural Science Edition
基金
国家自然科学基金青年科学基金项目(项目批准号:21307169)