Host: The Japanese Society of Toxicology
Name : The 47th Annual Meeting of the Japanese Society of Toxicology
Date : 2020 -
The studies for collecting precious metals and toxicant elements by using hyper-accumulator algae are being actively conducted due to its low costs and eco-friendliness. However the mechanism of the accumulation has not been cleared so far. We confirmed the accumulation of gold by unicellular algae, Pseudococcomyxa simplex, and elucidated the accumulation mechanism clarifying the chemical forms at their accumulation, and succeeded in visualizing the distributions of gold nanoparticles produced in a cell of algae. When selenite was added to the algae, selenium was much accumulated than those for selenate. The biogenic nanoparticles of Se were visualized by SEM and the chemical form was confirmed as elemental selenium by XAFS analysis.
