INTRODUCTION
Nanofiltration is a pressure-driven, membrane-based separation process whose characteristics fall between those of ultrafiltration and reverse osmosis.
Nanofiltration membranes were first introduced during the late 1970s, for water filtration and purification. However, starting in the early 1990s, the number of research activities resulting in patent applications and issued patents has increased rapidly, by a factor of six, leading to the development of innovative...
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