Desalination device comprising at least one electrochemical cell comprising: (a) an anode suitable for allowing the electrochemical reaction of oxidation of the OH - ion and consequent production of oxygen gas and release in solution of protons H + wherein said anode is contained in an anode chamber (14; 114) suitable for containing or containing as an anolyte an acidic solution; (b) a cathode connected through an electrical connection to said anode and suitable to allow the electrochemical reaction of reduction of proton H + and consequent production of hydrogen gas and release in solution of OH - ions wherein said cathode is contained in a cathode chamber (16; 116) suitable to contain or containing as a catholyte a basic solution, in particular an aqueous solution of NaOH; (c) a system for feeding said anode chamber with said acidic solution; (d) a system for feeding said cathode chamber with said basic solution; (e) a cation exchange membrane (28; 128) impermeable for OH - ions and permeable for cations, in particular Na +; (f) an anion exchange membrane (26; 126) impermeable for H + ions and permeable for anions, particularly Cl -; wherein said anodic chamber (14; 114) and said cathodic chamber (16; 116) are separated by said cation exchange membrane (28; 128) and said anion exchange membrane (26; 126) which in turn are separated by a third chamber (12; 112) suitable for containing or containing an aqueous solution of chloride salt, in particular NaCl, where (α) said cation exchange membrane (28; 128) is simultaneously a wall or a portion thereof of said cathode chamber (16; 116) and of said third chamber (12; 112) such that from the third chamber (12; 112) to the cathode chamber (16; 116) a passage of salt cations, in particular Na+, is possible; (β) said anion exchange membrane (26; 126) is simultaneously a wall or a portion thereof of said anode chamber (14; 114) and of said third chamber (12; 112) such that from the third chamber (12; 112) to the anode chamber (14; 114) a passage of salt anions, in particular Cl -, is possible; wherein said electrodes (18, 20) are made of graphite and wherein the desalination device further comprises (h) a carbonation reactor wherein the cathode chamber comprises an inlet and an outlet which are connected in a circuit in which said carbonation reactor is inserted. (a) an anode suitable for allowing the electrochemical reaction of oxidation of the OH - ion and consequent production of oxygen gas and release in solution of protons H + wherein said anode is contained in an anode chamber (14; 114) suitable for containing or containing as an anolyte an acidic solution; (b) a cathode connected through an electrical connection to said anode and suitable to allow the electrochemical reaction of reduction of proton H + and consequent production of hydrogen gas and release in solution of OH - ions wherein said cathode is contained in a cathode chamber (16; 116) suitable to contain or containing as a catholyte a basic solution, in particular an aqueous solution of NaOH; (c) a system for feeding said anode chamber with said acidic solution; (d) a system for feeding said cathode chamber with said basic solution; (e) a cation exchange membrane (28; 128) impermeable for OH - ions and permeable for cations, in particular Na +; (f) an anion exchange membrane (26; 126) impermeable for H + ions and permeable for anions, particularly Cl -; wherein said anodic chamber (14; 114) and said cathodic chamber (16; 116) are separated by said cation exchange membrane (28; 128) and said anion exchange membrane (26; 126) which in turn are separated by a third chamber (12; 112) suitable for containing or containing an aqueous solution of chloride salt, in particular NaCl, where (α) said cation exchange membrane (28; 128) is simultaneously a wall or a portion thereof of said cathode chamber (16; 116) and of said third chamber (12; 112) such that from the third chamber (12; 112) to the cathode chamber (16; 116) a passage of salt cations, in particular Na+, is possible; (β) said anion exchange membrane (26; 126) is simultaneously a wall or a portion thereof of said anode chamber (14; 114) and of said third chamber (12; 112) such that from the third chamber (12; 112) to the anode chamber (14; 114) a passage of salt anions, in particular Cl -, is possible; wherein said electrodes (18, 20) are made of graphite and wherein the desalination device further comprises (h) a carbonation reactor wherein the cathode chamber comprises an inlet and an outlet which are connected in a circuit in which said carbonation reactor is inserted.