Figures ) depict the water and ion fluxes through the membrane for varying block ratios m : n. We observe that the total number of water molecules that traverse the membrane pores per unit of time is the highest for the 12 : 8 CPAM system. Beyond a B n -block ratio of n = 8, a significant reduction in water flux is observed, primarily due to the increased obstruction of the pore area caused by higher polymer density. Recent studies have reported maximum water fluxes of 600 ns -1 and 140 ns -1 from nanoporous graphene membranes and boron nitride membranes , respectively. However, as shown in Fig. (a), the presence of four nanopores in the graphene system studied here leads to a substantial increase in water flux, reaching values as high as 1800 ns -1 .