活性氧化铝吸附-超滤组合工艺除氟的实验研究  

Activated Alumina Adsorption-Ultrafiltration Composite Processes for Fluoride Removal

作　　者：何崇[1] 杨宏伟[2] 杨娟[2] 祝万鹏[2] 何绪文[1] 

机构地区：[1]中国矿业大学化学与环境工程学院,北京100083 [2]清华大学环境科学与工程系,北京100084

出　　处：《净水技术》2010年第1期23-26,共4页Water Purification Technology

基　　金：国家"十一五"科技支撑计划项目(2006BAD01B02)

摘　　要：试验旨在为设计一套农村小型集中式或分散式除氟供水设备提供参考。采用了活性氧化铝吸附-超滤组合除氟工艺进行地下水除氟的试验,研究了该系统原水的pH、回流量、膜通量对于除氟效果和膜污染情况的影响。结果表明,在恒流条件下,原水氟浓度2 mg/L,反冲周期6 h,反冲时间2 min,反冲强度150 mL/min,投加粒径200～300目的活性氧化铝0.2 g/L,保持原水pH=6.5左右,膜通量=45 L/m^2·h,沉淀池与反应池间的回流比=0.5,能使该系统的出水氟浓度<1.2 mg/L,总铝含量<0.1 mg/L,浊度<0.05,并且能有效地缓解膜污染,使反应器长期运行。The experiment aimed to make reference to design a rural small-scale centralized or distributed defluoridation water supply equipment. Activated alumina absorption-uhrafiltration composite processes were adopted to remove fluoride from groundwater. The question how pH of raw water, quantity of reflux and membrane flux effected on defluoridation and membrane fouling were studied. The results show that under the conditions of constant current,with the raw water fluoride concentration of 2mg/L, backwashing cycle of 6 h ,backwashing time of 2 min,backwashing flow at 150 mL/min,dosage of 200-300 meshes activated alumina of 0.2 g/L, keeping pH at 6.5,membrane flux at 150 mL/min, reflux ratio of sedimentation and reaction zone at 0.5, enable the concentration of fluoride〈1.2 mg/L, total aluminum concentration〈0.1 mg/L, turbidity〈0.05 NTU, and relief the membrane fouling effective, so that the reactor can be operated for a long time.

关 键 词：吸附 超滤 除氟 膜污染 

分 类 号：X523[环境科学与工程—环境工程]