Effect of membrane properties and pretreatment on flux and NOM rejection in surface-water NF

摘要

Nanofiltration (NF) is a compact process that has potential for removing organic and inorganic pollutants from drinking water. In this study, various NF membranes for surface-water treatment were compared - in terms of solute rejection and membrane flux - using a batch-stirred cell and cross-flow equipment. The rejection of natural organic matter (NOM) was closely related to ion rejection and membrane flux. To better control NOM, NF membranes having an effective MWCO of less man 200 Da were required because of the bimodal distribution of NOM in surface water. The NF membranes' flux was related to their hydrophobicity and charges.