Regional Symposium on Innovation in science and technology

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Stainless steel meshes coated with layered double hydroxide/graphene oxide nanocomposite used for water desalination

Authors :

Fahimeh Foroutan¹ Hossein Ahmadzadeh² Maryam Davardoostmanesh³

1- دانشگاه فردوسی مشهد 2- دانشگاه فردوسی مشهد 3- دانشگاه فردوسی مشهد

Keywords :

Desalination،layered double hydroxide،graphene oxide،stainless steel mesh

Abstract :

Coated stainless steel meshes with layered double hydroxides and graphene oxide nanocomposites (LDH/GO) were used as desalination membranes. The nature of stainless-steel mesh allows a greater amount of sorbent to be coated on the surface using sol-gel technique and increases the adsorption capacity of ions and the efficiency of desalination. To achieve the best desalination efficiency, different parameters were optimized, including the ratio of GO to LDH in the nanocomposites, the number of mesh layers, NaCl concentrations, and process cycles. The maximum adsorption capacity for the NaCl was 555.5 mg g−1. The results revealed that LDH/GO nanocomposite was able to remove (94.3 ± 0.5) % of the NaCl under the optimum conditions. The proposed method was used to successfully remove Na+, Mg+2, Ca+2, and K+ cations from seawater, with the yields of 92.3%, 92.5%, 91.2%, and 90.2%, respectively.