Characterization and Phosphate Adsorption Capability of Novel Nickel–Aluminum–Zirconium Complex Hydroxide

• Published in: Chemical & pharmaceutical bulletin Vol. 68; no. 3; pp. 292 - 297
• Main Authors: Ogata, Fumihiko, Iijima, Shouko, Toda, Megumu, Otani, Masashi, Nakamura, Takehiro, Kawasaki, Naohito
• Format: Journal Article
• Language: English
• Published: Japan The Pharmaceutical Society of Japan 01-03-2020; Pharmaceutical Society of Japan; Japan Science and Technology Agency
• Subjects: Adsorption; Aluminum; Aluminum - chemistry; Binding energy; Coordination Complexes - chemical synthesis; Coordination Complexes - chemistry; Coordination compounds; Energy; Energy distribution; Eutrophication; Evaluation; Heavy metals; Hydroxides - chemistry; Hydroxyl groups; Ions; Nickel; Nickel - chemistry; nickel–aluminum–zirconium complex hydroxide; Particle Size; Phosphate; phosphate ion; Phosphates - chemistry; Phosphorus; Physicochemical properties; Roasting; Scanning electron microscopy; Sulfates; Sulfur; Surface Properties; Thermodynamics; X-ray diffraction; Zirconium; Zirconium - chemistry; phosphate ion; nickel–aluminum–zirconium complex hydroxide; adsorption
• ISSN: 0009-2363; 1347-5223
• DOI: 10.1248/cpb.c19-01053

In this study, the adsorption capability of phosphate ion using a novel tri-metals complex hydroxide was evaluated for preventing the eutrophication in water environment. A nickel–aluminum–zirconium complex hydroxide (NAZ) was synthesized using each inorganic sulfate mixing ratio of 0.9 : 1.0 : 0.1 and was calcined at different temperatures. The characteristics of the NAZ were analyzed by scanning electron microscopy images, X-ray diffraction analysis, elemental distribution, and binding energy. Moreover, the amount adsorbed of phosphate ion onto uncalcined and calcined NAZ was measured. That of phosphate ions onto the uncalcined was the largest of all. These results suggested that the adsorption of phosphate ions tends to depend on the physicochemical properties (e.g., amount of hydroxyl groups, pore volumes, and pH) of the adsorbents. Moreover, the adsorption mechanism of phosphate ions was evaluated on the basis of binding energy and elemental analysis. After adsorption, the binding energy of phosphorus P (2s and 2p) peaked and the sulfur peak intensity S(2s) reduced. This result indicated that the adsorption mechanism of phosphate would be exchanged with sulfate ions.