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US 10,882,767 B2Granted
Method for removing ammonia nitrogen in aqueous solution
AssigneeNational Sun Yat-Sen University
InventorsYu-Jen Shih, Chin-Pao Huang, Yao-Hui Huang
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Abstract
A method for removing ammonia nitrogen in an aqueous solution is provided in the present invention. The method includes performing an electrolysis reaction using an electrolysis device, such that the ammonia nitrogen is converted into nitrogen gas, nitrate or nitrite. The electrolysis device includes an anode including metal nickel, nickel hydroxide or nickel oxyhydroxide, and a cathode including metal copper. The method has high selectivity of converting the ammonia nitrogen into the nitrogen gas.
Claims5
A method of removing ammonia nitrogen in an aqueous solution, the method comprising:
- providing an electrolysis device, the electrolysis device comprising:
- at least one anode, comprising nickel hydroxide (Ni(OH)2) or nickel oxyhydroxide (NiOOH);
- at least one cathode, comprising metal copper;
- and
- an electrolytic solution, comprising ammonia nitrogen, wherein pH of the electrolytic solution is 9 to 12, and the electrolytic solution excludes chloride ions;
- and
- a tank accommodating the at least one anode, the at least one cathode and the electrolytic solution;
- and
- performing an electrolytic reaction, wherein the electrolytic reaction is performed under a current density of 0.08 mA/cm2 to 2.5 mA/cm2, and the nickel hydroxide in the at least one anode is reacted to form nickel oxyhydroxide during the electrolytic reaction, such that the ammonia nitrogen is converted into nitrogen gas, nitrate or nitrite by the nickel oxyhydroxide during the electrolytic reaction.
6 more elements
Dependencies are inferred from the claim text.