| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2014: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Outline of Final Research Achievements |
The effect of water quality on the chronic toxicity to crustacean and algae was studied and the model of this effect was established. The chronic toxicity of nickel to crustaceans was affected by hardness (calcium, magnesium) and pH. A model was constructed and the result of actual industrial effluents was predicted. EC 50 could be predicted with an error within 3 times, but EC 20 had a large error. Chronic toxicity of nickel to algae was also modified by hardness (magnesium) and pH in the same way as crustacean. Changes in the chemical form of Ni during exposure and the relationship between accumulated Ni in crustacean and algae and chronic effect were discussed.
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