Investigation of reverse ionic diffusion in forward-osmosis-aided dewatering of microalgae: A molecular dynamics study.

•Higher draw solution concentration led to lower diffusion coefficients of ions.•Higher draw solution concentration induced lower hydration numbers of ions.•The ionic permeability and hydration number of cations are inversely proportional.•Mg2+ ions resulted to lower ionic permeability as compared to Na+ ions.•Ions permeate the membrane as pairs although they exist individually in solution.