纳滤去除水中布洛芬的研究

Study on the nanofiltration of ibuprofen from water source

分别从污染物的纳滤过程、溶液性质以及预接触时间等因素探讨纳滤膜去除环境微污染物布洛芬(IBU)的性能.结果表明,随着pH的增大布洛芬水溶液在纳滤过程中的通量也随之增大,布洛芬的离子化程度逐渐增大,其与膜面负电荷的互斥作用也增强,布洛芬溶液的纳滤过程持续保持较高的截留性能;加入天然有机物(NOM)后,布洛芬溶液膜通量明显降低,截留率值增大,膜面对IBU的吸附量降低;预接触时间的增大,对IBU的纳滤过程起始通量影响较大,膜面对IBU的累积吸附量变化并不大.

Ibuprofen, a kind of environmental micro-pollutants was studied by nanofiltration in view of nanofiltration process, solution chemistry and pre-contact time. The results showed that the membrane permeate flux increased with the increased pH. The nanofiltration membrane has kept high retention efficiency due to the higher ionization degree at higher pH. The membrane flux has decreased dramatically with the presence of NOM and the higher retention decreased. The long pre-contact time will affect initial adsorption quantity of IBU. can be obtained while the adsorption quantity flux, but has no big effect on the accumulative