Nanoparticulate metal sulfides and their importance of stability of trace metals in oxygenated seawater

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K00516
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Environmental dynamic analysis
• Research Institution: Osaka University (2016-2017); The University of Tokyo (2015)
• Principal Investigator: Nakayama Noriko 大阪大学, 理学研究科, 招へい研究員 (60431772)
• Research Collaborator: OBATA Hajime ; NISHIOKA Jun
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 金属硫化物 / ナノ粒子態 / 海水中の微量金属 / 海底熱水

Outline of Final Research Achievements

Concentrations of acid volatile sulfides (AVS) as metal sulfides were studied over the submarine hydrothermal fields with an emphasis on the stability and preservation of trace metal. These studies find several important aspects of metal sulfide nanoparticles. Dissolved metal sulfide originating from hydrothermal vents contributes to a large portion of the observed high dissolved total sulfide concentration even in the surface water, indicating that metal-sulfide complex is quite stable in preventing its rapid removal from the water column by metal precipitation and/or oxidation in an oxic environment.

Free Research Field

海洋物質循環