纳米SiO_2/SDBS复合强化超滤处理含镉废水的影响因素  

Enhanced ultrafiltration for the wastewater treatment containing cadmium ions with nano SiO_2 and SDBS

作　　者：庞治娟[1] 周迟骏[1] 

机构地区：[1]南京工业大学环境学院,江苏南京210009

出　　处：《化工进展》2009年第8期1468-1472,共5页Chemical Industry and Engineering Progress

基　　金：国家高技术研究发展计划(国家863计划;2007AA06A402)

摘　　要：以纳米SiO2同阴离子表面活性剂十二烷基苯磺酸钠(SDBS)复合的胶束强化超滤处理含镉废水。考察了粉体加入、pH值、粉体浓度对超滤的影响。结果表明,纳米SiO2加入后,膜通量提高了25%,Cd2+截留率有所提高,渗透液中SDBS的浓度在一定条件下有所降低。膜通量、SDBS及Cd2+的截留率随pH值的变化而变化,三者随纳米SiO2加入量的增大而降低。另外,膜阻力主要为膜面吸附和膜孔堵塞阻力。The removal of Cd^2＋ ions through ultrafiltration from aqueous solution using anionic surfactant SDBS added with nano SiO2 was studied. Effects of nano SiO2 addition and pH on the ultrafiltration process were investigated. The permeation flux was increased by 25% through the addition of nano SiO2, the removal of Cd^2＋ was also increased in some extent, while the permeated SDBS concentration became lowered. The permeation flux and the rejection of SDBS and Cd^2＋ are affected by the pH of the solution, which would become lowered when increasing the nano SiO2 addition. In addition, the membrane fouling was mainly due to the the membrane surface adsorption resistance and the membrane pore blocking resistance.

关 键 词：纳米SIO2 胶束强化超滤 含镉废水 

分 类 号：X703.1[环境科学与工程—环境工程]