Graphene oxide/basic aluminum sulfate (GO-BAS) composites were prepared via hydrothermal method using graphene oxide (GO)
aluminum sulfate and urea as raw materials. The composites were blended with piperazine (PIP) solution as the water phase
trimesoyl chloride (TMC) was desolved in the hexane solution as the organic phase. The GO-BAS doped polyethersulfone/polyamide (PES-PA-GO-BAS) composite nanofiltration membrane was synthesized by interfacial polymerization method which forms a polyamide functional layer on the polyethersulfone (PES) ultrafiltration substrate membrane. It's performance was studied at a lower working pressure(0.3 MPa). The inorganic salt solutions rejection of the composite membrane as follows:Na2SO4(91.08%) > MgSO4(83.42%) > MgCl2(68.97%) > NaCl(17.62%)
and the pure water flux up to 24.19 L·m-2·h-1
which is improving nearly 60% than the polyamide membrane. The nanofiltration membrane has a good alkali resistance and operation stability.