AWWA MTC64593

AWWA MTC64593 Charge Effects on the Rejection of Pharmaceuticals with Nanofiltration
Conference Proceeding by American Water Works Association, 03/01/2007

Verliefde, A.R.D.; Heijman, S.G.J.; Cornelissen, E.R.; Amy, G.; Van der Bruggen, B.; van Dijk, J.C.

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The removal efficiency of several pharmaceutically active compounds from surface waterwas investigated. Two different nanofiltration (NF) membranes (Trisep TS-80 and Desal HL)were studied at low feed water recoveries (10%). Results indicate that removal of theselected pharmaceuticals with NF is mainly influenced by charge effects: negatively chargedsolutes are better removed, compared to uncharged solutes, which are, in turn, betterremoved compared to positively charged solutes. This is mainly due to charge attractionsbetween the negatively charged membrane surface and positively charged solutes. Includes 12 references, tables, figures.