Abstract
Polymer-based nanofiltration (NF) membranes are an important class of membrane technology and have been used for filtration and purification of kinds of liquids such as industrial chemicals, solvents, beverages, liquids, water, wastewater on large scale containing ions and molecules. The permeability of the pristine polymeric NF membrane towards a variety of liquids can be modulated by incorporating different kinds of nanomaterials into it. Graphene oxide (GO) is an important class of carbon-based nanomaterial having various properties to make it a suitable meant for manipulating the intrinsic characteristics of the various polymer membranes for filtration applications. Hydrophobic core and hydrophilic surface functionality of GO structure help to modify the applicability of membrane in a variety of ways practically. This chapter mainly focuses on the introduction to various filtration technologies according to sizes of the membrane. Moreover, a method for functionalization, fabrication, and applications of GO-based composite NF membranes is also discussed. Finally, typical uses of GO-based NF membranes for water and wastewater treatment are also summarized.
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