A sorbent cartridge manufacturing method comprising: providing a frame comprising a first side, a second side, a plurality of compartments each configured to hold sorbent material , a plurality of respective walls arranged to form and separate the plurality of compartments, wherein a first end of each wall is arranged on the first side and a second end of each wall is arranged on the second side; arranging a first air and/or fluid permeable membrane on the first side, melting at least a portion of the first end of the plurality of the walls, wherein portions of the first permeable membrane lying adjacent the melted portion of the first end bond with the melted portion thereby affixing the first permeable membrane thereto; filling the plurality of the compartments with sorbent material; arranging a second air and/or fluid permeable membrane on the second side, melting at least a portion of the second end of the plurality of the walls, wherein portions of the second permeable membrane lying adjacent the melted portion of the second end are configured to bond with the melted portion thereby affixing the second permeable membrane thereto; wherein: melting is facilitated by applying heat, radiation or ultrasonic power, application of heat comprises applying pressure to the first and/or second ends of the plurality of walls via a plate for a predetermined period of time, and the plate is configured with apertures , at least a portion of which correspond with the one and/or another of the plurality of compartments. providing a frame comprising a first side, a second side, a plurality of compartments each configured to hold sorbent material , a plurality of respective walls arranged to form and separate the plurality of compartments, wherein a first end of each wall is arranged on the first side and a second end of each wall is arranged on the second side; arranging a first air and/or fluid permeable membrane on the first side, melting at least a portion of the first end of the plurality of the walls, wherein portions of the first permeable membrane lying adjacent the melted portion of the first end bond with the melted portion thereby affixing the first permeable membrane thereto; filling the plurality of the compartments with sorbent material; arranging a second air and/or fluid permeable membrane on the second side, melting at least a portion of the second end of the plurality of the walls, wherein portions of the second permeable membrane lying adjacent the melted portion of the second end are configured to bond with the melted portion thereby affixing the second permeable membrane thereto; wherein: melting is facilitated by applying heat, radiation or ultrasonic power, application of heat comprises applying pressure to the first and/or second ends of the plurality of walls via a plate for a predetermined period of time, and the plate is configured with apertures , at least a portion of which correspond with the one and/or another of the plurality of compartments. melting is facilitated by applying heat, radiation or ultrasonic power, application of heat comprises applying pressure to the first and/or second ends of the plurality of walls via a plate for a predetermined period of time, and the plate is configured with apertures , at least a portion of which correspond with the one and/or another of the plurality of compartments. <EOS>