We suggest the following directions for the future study: (i) Altering functional groups and counterions in DCPAMs could significantly influence the solubility and stability of the polymers. Additionally, counterions play a crucial role in secondary salt formation and affect ion adsorption by the piston. (ii) Grafting polymers onto the surface of the membrane and/or piston can improve the ion-capturing process. This approach helps protect both the membrane and the piston from fouling, thereby enhancing the overall durability and efficiency of the process. (iii) Further research in membrane engineering can focus on optimizing pore blockage and improving the flux ratio as a function of pore shape and size to achieve more efficient and sustainable operation.