Takashi Tomiyasu

TL;DR: This method was successfully applied to various water samples--river water, pond water, rain water, commercial mineral water, and tap water--with only filtration and dilution steps.

TL;DR: An inspection of the vertical profiles of mercury concentration in cores suggested that the deposited mercury had not been fixed in sediment but had been transported, despite 30 years having past since the last discharge of contaminated effluent.

TL;DR: Although the vertical variations were similar to those for total mercury, Fukuro Bay sediment showed a higher concentration of methylmercury than Minamata Bay sediment, which can be considered to represent the background concentration absent of anthropogenic influence.

TL;DR: It was confirmed that N-nitrosamines in basic aqueous solution were transformed to peroxynitrite by UV irradiation, and results indicate that the proposed method can be applied satisfactorily to the determination of N-Nitrosamine in water samples.

TL;DR: At the mixing location of mining water with natural river water, major elements and cadmium showed simple physical mixing (conservative mixing), and other heavy metals showed the massive precipitation at the mixing event.