Investigation of influences of environmental factors as for mercury elution and mercury methylation in the soil

用日本典型土壤(黑土、棕壤、红黄壤)制成以100ppm、10ppm为汞浓度的人工污染土壤，稳定化时间为6个月。我们利用这些土壤进行了近3个月的环境因子培养实验，然后对每种土壤中汞的化学变化进行了调查。实验的结果是，与培养实验的起点相比，各土壤总汞浓度的变化并不明显。然而，黑土(100ppm)的甲基汞含量按时间顺序明显增加。在10ppm时，红黄壤的甲基汞含量高于其他土壤。此外，红黄壤的溶解汞含量(100ppm、10ppm)高于人工汞污染的其他土壤。

Artificially contaminated soils that were contaminated by mercury based on 100 ppm ,10ppm as mercury concentration were made by using typical soil in Japan( Kuroboku soil, Brown forest soil, Red yellow soil) with stabilization of 6 month. These soils were utilized almost 3months in our environmental factor incubation experiments, and then we were investigated as for chemical changes of mercury in each soils. As a result of experiments, the variations of total mercury concentrations of each soil were not recognized in comparison with starting point of the incubation experiment. However, methylmercury content of Kuroboku soil(100ppm) was clearly increased chronologically. In case of 10ppm, methylmercury concentration of Redyellow soil was higher than other soils. Also, dissolved mercury concentrations of Redyellow soils (100ppm, 10ppm) were higher than other soils that were contaminated by mercury artificially.