A filtration or selective fluidic isolation and recovery device, comprising: a housing having an inlet and an outlet, said housing having an opening extending from said inlet to said outlet; an internal support structure (34, 35) maintained in said opening; and at least one planar filtration media carried by said internal support structure (34, 35), wherein the filtration media comprises at least three planar channels, the at least three planar channels comprising at least one first permeate spacer, at least one second permeate spacer, and at least one feed channel; and at least one first perforated membrane having apertures sized to block a first component of the feedwater and at least one second perforated membrane having apertures sized to block a second component of the feedwater, the apertures of the at least one first perforated membrane being greater in size than the apertures of the at least one second perforated membrane; and a membrane support structure associated with each said planar membrane (42, 82) and carried by said internal support structure (34, 35), said membrane support structure being removable from said housing for cleaning, servicing or replacement; and wherein said first perforated membrane is positioned between said feed channel and a first of said membrane support structures, wherein said second perforated membrane is positioned between said at least one first permeate spacer and a second of said membrane support structures, and wherein a first of said at least one second permeate spacer is positioned adjacent a side of said second of said membrane support structures opposite said second perforated membrane, and wherein said first perforated membrane and said second perforated membrane are constructed from a perforated two-dimensional material, said planar filtration media separating feedwater received at said inlet into at least a first permeate, a second permeate and a concentrate that separately exit at said outlet. a housing having an inlet and an outlet, said housing having an opening extending from said inlet to said outlet; an internal support structure (34, 35) maintained in said opening; and at least one planar filtration media carried by said internal support structure (34, 35), at least three planar channels, the at least three planar channels comprising at least one first permeate spacer, at least one second permeate spacer, and at least one feed channel; and at least one first perforated membrane having apertures sized to block a first component of the feedwater and at least one second perforated membrane having apertures sized to block a second component of the feedwater, the apertures of the at least one first perforated membrane being greater in size than the apertures of the at least one second perforated membrane; and a membrane support structure associated with each said planar membrane (42, 82) and carried by said internal support structure (34, 35), said membrane support structure being removable from said housing for cleaning, servicing or replacement; and wherein said first perforated membrane is positioned between said feed channel and a first of said membrane support structures, wherein said second perforated membrane is positioned between said at least one first permeate spacer and a second of said membrane support structures, and wherein a first of said at least one second permeate spacer is positioned adjacent a side of said second of said membrane support structures opposite said second perforated membrane, and wherein said first perforated membrane and said second perforated membrane are constructed from a perforated two-dimensional material, said planar filtration media separating feedwater received at said inlet into at least a first permeate, a second permeate and a concentrate that separately exit at said outlet.