Reduction of Salinity from sea water using air micronanobubbles and graphene in laboratory scale

Abstract

The objective of the research was to reduce the salinity of the waters of San Pedro, Lurín, Peru. The proposed method was a pre-treatment with Micro-Nanobubbles (MNBs) of air at different times and a post-treatment with graphene at different concentrations, this was called Grafenano. The first stage was to first pass the samples collected by the MNBs generator, which allowed to reduce the physical and chemical parameters; The second stage consisted of filtering the water treated with MNBs using graphene in three proportions 5 g, 10 g and 15 g, which allowed to reduce the concentration of dissolved salts. The salinity of the seawater was determined as well as the physical-chemical parameters before and after the treatment. The air micronabubbles and graphene were characterized. The results obtained were: removal of Turbidity in 96% (from 27.57 NTU to 1.06 NTU), conductivity in 65% (from 49.01 mS/cm to 17.04 mS/cm), of BOD5 in 70% (from 2.42 mg/L to 0.72 mg/L) and a salt removal of 47% (from 34.46 g/L to 18.41 g/L).