Abstract: A forward osmosis water treatment device includes a plurality of forward osmosis separation membrane in which each forward osmosis separation membrane includes an active layer and a support layer, first spacers disposed between two active layers facing each other, and second spacers disposed between two support layers facing each other, wherein a plurality of the first spacers and the second spacers are included so as to form a stack structure together with the forward osmosis membranes, the plurality of the first spacers form a first flow path forming a flow of water to be treated, and the plurality of the second spacers form a second flow path forming a flow of a draw solution.

Abstract: A membrane may include a polymer matrix and a compound represented by Chemical Formula 1, In Chemical Formula 1, A is a substituted or unsubstituted C3 to C10 aromatic cyclic group, m is an integer of 0 to 5, and n is 0 or 1, provided that m and n are not simultaneously 0 (e.g., when A is an unsubstituted benzene group). A separation membrane for water treatment may include the membrane. A water treatment device may include the separation membrane for water treatment.