Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
642881 | Separation and Purification Technology | 2010 | 11 Pages |
Abstract
In this study, TFC RO membranes were prepared through interfacial polymerization with hexamethyl phosphoramide (HMPA) as an additive in the aqueous phase. There are two main highlights as follows: ⶠThe flux of the membrane was greatly enhanced by the addition of HMPA, while maintaining good salt rejection. The flux and salt rejection of MH-3 membrane (3 wt% HMPA addition) reached 51.67 L/m2 h and 98.27%, respectively, for 2000 mg/L NaCl under 1.55 MPa. The flux increased by 73% and the salt rejection loss was less than 0.21% compared with the non-additive membrane. ⶠThe colloidal silica fouling experiments results suggested that conventional roughness parameters such as Ra, Rms and Πwere insufficient to explain the colloidal fouling behavior in our study. We think that the average peak-valley distance and average peak spacing width on the membrane surface were related to the membrane fouling behavior.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Filtration and Separation
Authors
Meirong Duan, Zhi Wang, Jun Xu, Jixiao Wang, Shichang Wang,