| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Outline of Final Research Achievements |
One of the setbacks of using phytoremediation techniques is that the toxic substances accumulate in the plant tissues and there is a possibility of re-release after decomposition of the plant. Charophytes, due to their properties of calcification, can bind toxic substances to the calcite which is relatively stable and resists decomposition. However, accumulation of toxic materials may exert abotic stress to the charophytes and deter the phtoremediation process. In this study, we tested stress tolerance and phytoremediation efficiencies of Chara australis, Chara braunii, and Nittella pseudoflabellata to different concentrations of zinc, arsenic, and cesium exposure. Although increasing the concertation of metals (zinc, arsenic, and cesium), the stress condition of the algae increased, they could grow and accumulate considerable amount (30-40%) of those elements. Therefore, these plants can be successfully used for phytoremediation of heavy metals from water.
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