A novel approach using a stacked layer filtration process to desalination from cotton fabric and conductive graphene sheets

Abstract

ABSTRACT Given the growing water scarcity problem, desalination of seawater offers a promising solution for obtaining potable water. While various methods have been used in the past, membrane technology remains the leading approach. However, challenges persist, including high operational costs, limited membrane durability, and susceptibility to fouling, which require effective management solutions. Graphene oxide membrane desalination and solar desalination have made substantial advancements in converting salt water into fresh water in recent years. This study utilized artificial sea water (ASW) derived from different salt mixes as the primary source for desalination. Two filters were prepared with cotton fabric and conductive graphene sheets, layer by layer. This experimental approach of stacked layer filtration (SLF) desalination demonstrated favorable outcomes, as an outcome of chloride removal has been achieved in all samples. When using ASW samples diluted at a ratio of 20:1, SLF-I was able to remove 42.86% of chloride, whereas SLF-II removed 57.14%. It was observed that the fabric could be cleansed by hand to remove salts that had accumulated as a result of evaporation, thereby making it reusable. At the same time, no swelling was observed in the conductive graphene sheet.