▎ 摘　　要

NOVELTY - Manufacturing adsorption electrode, comprises (i) generating a composite comprising reduced graphene oxide and bilayer hydroxide, and (ii) generating an adsorption electrode comprising the complex. The generated adsorption electrode has a larger ion selection coefficient for the first ion than the ion selection coefficient for the second ion which is heterogeneous with the first ion. The first ion includes phosphorus ions and pentavalent arsenic (As+5) ions. The concentration of the second ion is 5-20 times the concentration of the first ion. The adsorption performance of the adsorption electrode to the first ions is 3-7 times the adsorption performance of the adsorption electrode to the second ions. USE - The method is useful for manufacturing adsorption electrode. ADVANTAGE - The adsorption electrode: removes contaminants of phosphorus or pentavalent arsenic dissolved in a small amount in water used for drinking water; and has excellent regeneration performance, high adsorption efficiency based on selectivity, and high selectivity for phosphorus ions and phosphate ions. The method can quickly and environmentally regenerate used adsorption electrode. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for adsorption electrode comprising composite made of reduced graphene oxide and bilayer hydroxide.