摘要
采用三种孔径分别为200 nm、50 nm和20 nm的陶瓷膜,以聚丙烯酸为络合剂,含Cu2+废水作为模拟废水,研究聚合物强化膜分离处理低浓度重金属废水的过程.重点考察运行时间、跨膜压差、聚合物/金属离子质量浓度比P∶M值及pH对渗透通量和重金属离子截留率的影响.研究表明,控制合适的条件,陶瓷微滤膜和超滤膜对Cu2+均达到99.8%的截留率,且能得到较高的渗透通量.
The treatment of low- level heavy metal wastewater was studied by polymer enhanced ceramic mem- brane filtration process. Using polyacrylic acid as the complexing reagent, and aqueous solution containing Cu2 ＋ as the simulated heavy metal wastewater, three kinds of ceramic membrane with different pore size of 200 nm, 50 nm, 20 nm respectively were investigated. Various operating parameters such as operation time, transrnem- brane pressure（TMP）, polymer/metal ratio（P：M） and pH value were discussed. Under the optimal operation conditions, the rejection rate of Cu2＋ was greater than 99.8%, in the meantime, higher fluxes can be obtained by ultra or micro - filtration process.
出处
《膜科学与技术》
CAS
CSCD
北大核心
2009年第5期79-82,共4页
Membrane Science and Technology
关键词
陶瓷膜
微滤
超滤
重金属废水
ceramic membrane
micro-filtration
ultra- filtration
heavy metal wastewater
