摘要
针对TiO2光催化剂难以回收的难题,自制了聚偏氟乙烯(PVDF)中空纤维膜,并用于反应器中TiO2的回收。把PVDF膜组件和TiO2光催化器集成得到膜组件外置的光催化膜反应器,考察这种反应器对有机物废水的处理效果。研究了光源辐射照度、光催化剂含量、目标降解物类型及初始含量对降解效率的影响。结果表明,PVDF膜对TiO2纳米颗粒的截留效果可达100%,膜的水通量可达87.55 L/(m2·h)。最大吸收波长在光谱范围内,有机物的降解率随辐射照度的增大而增加;增加光催化剂含量,光催化降解率将会提高;目标降解物初始含量升高,降解率随之下降。
According to the problem of TiO： photocatalyst difficult recover from reactor, PVDF hollow, fiber membranes were prepared and used to recover TiO2 from reactors. A TiO： photocatalytic membrane reactor which was composed of PVDF membrane module and TiO2 photocatalyst reactor were prepared and its tream^ent effect for organic wastewater was investigated. These influence effects of luminous intensity of light source, concentration ofphotocatalyst, kinds and initial concentration of object organics were investigated for their degradation rate. The results showed that the PVDF hollow fiber membrane can retain absolutely the TiO2 nanoparticle and the permeation flux of water can reach 87.55 L/（m2·h）.The degradation rate of organic substance increased with the increase of luminous intensity of light source in the scope of maximum absorption wavelength, and increasing concentration of photocatalyst improved degradation rate greatly. However, increasing initial concentration of object organics, degradation rate decreased accordingly.
出处
《水处理技术》
CAS
CSCD
北大核心
2014年第5期59-62,共4页
Technology of Water Treatment
基金
国家自然科学基金项目(20866007)
江西省环境保护厅科技计划项目(JXHBKJ2011-5)
江西省教育厅科技项目(GJJ12417
GJJ11507)
关键词
TIO2
光催化
中空纤维膜
膜分离
反应器
TiO2
photocatalyst
hollow fiber membrane
separation membrane
reactor
