Full Description

Nanofiltration (NF) membranes, having properties partially overlapping those of reverseosmosis and ultrafiltration membranes, have the potential capability for removing a broadrange of water pollutants including pathogens, organic substances, and inorganiccontaminants. Each of these contaminants may pass through a NF membrane by differentmechanisms. For example, the permeation of small inorganic molecules could take placeby sorption and subsequent diffusion in the membrane active layer, as well as byadvection through pores or imperfections produced during membrane manufacturing,installation, or operation. In contrast, the passage of particles including microorganismsthrough membranes might be mainly the result of advection through larger pores orimperfections. Therefore, an accurate characterization of the pore size distribution (PSD)of the membrane active layer and support layers might assist in elucidating theperformance of NF membranes with respect to various types of contaminants.The objective of this study was to elucidate some of the mechanisms responsible for thepassage of viruses, organic solutes, and inorganic solutes through nanofiltration (NF)membranes by characterizing the pore size distribution (PSD) of the membranes. Includes 5 references, tables, figures.

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Edition: Vol. - No. Published: 03/05/2003 Number of Pages: 8File Size: 1 file , 310 KB