Development of a nickel catalyst added with zinc contributing to purification of groundwater polluted with nitrate

2020 Fiscal Year Final Research Report

• Project/Area Number: 18H01780
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 27030:Catalyst and resource chemical process-related
• Research Institution: Hokkaido University
• Principal Investigator: Kamiya Yuichi 北海道大学, 地球環境科学研究院, 教授 (10374638)
• Co-Investigator(Kenkyū-buntansha): 大友 亮一 北海道大学, 地球環境科学研究院, 准教授 (10776462)
• Project Period (FY): 2018-04-01 – 2021-03-31
• Keywords: 地下水汚染 / 硝酸態窒素 / 担持ニッケル触媒 / 助触媒添加

Outline of Final Research Achievements

Expose of supported nickel catalysts to air made their catalytic activity lost in reduction of nitrate with hydrogen in water. Thus, to bring out their inherent catalytic performances, it was necessary to remove air from the reaction systems as much as possible. The catalytic performances of supported nickel catalysts for reduction of nitrate with hydrogen in water were significantly changed depending on support for nickel and co-catalyst added to nickel. It was found that a supported nickel catalyst with alumina support and zinc as a co-catalyst with 0.04 of atomic ratio of zinc to nickel showed high catalytic activity and suppressed undesirable ammonia formation.

Free Research Field

環境触媒化学

Academic Significance and Societal Importance of the Research Achievements

貴重な水資源である地下水の硝酸イオンによる汚染が日本を含め世界各地で問題になっている。本研究の成果は、汚染地下水を浄化する有望な技術の一つである触媒反応による水中硝酸イオン水素化分解に関するものであり、この反応に対して飲用に望ましくないアンモニアの生成を大きく抑制し、かつ安価な触媒を提供するための基盤技術を提供する。