| 稀土元素对富营养化水体中藻类增长的影响 |
| 摘要点击 647 全文点击 1365 投稿时间：1997-12-20 |
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| 中文关键词 富营养化 稀土元素 藻类增长 太湖 平均最大现存量 平均最大特定增长率 |
| 英文关键词 eutrophication rare earth elements (REEs) algal growth Taihu Lake average maximum standing crop average algal special growth rate |
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| 中文摘要 |
| 利用藻类生长潜力测试方法(AGP试验),在太湖五里湖区水样中分别添加不同浓度轻、中、重3种稀土元素(La(Ⅲ)、Gd(Ⅲ)、Y(Ⅲ))与3种稀土混合物,研究稀土元素对富营养化水体中藻类增长的影响。结果表明,在本试验条件下,单独添加La、Gd和Y在低浓度水平(0.2mg/L)能显着促进羊角月芽藻的增长,而添加混合稀土元素无明显的促长作用。在单独添加3种稀土元素和混合稀土的同时添加磷(HPO42-,0.04mg/L),仅轻稀土La在0.2mg/L水平上表现了与磷对羊角月芽藻的协同促长作用。 |
| 英文摘要 |
| In this study,Taihu Lake water was spiked with rare earth elements (REEs) La(Ⅲ)、Gd(Ⅲ) and Y(Ⅲ) in various doses,and the effects of REEs on algal growth were investigated.Results showed that the growth of algae (Selenastrum capricornutum)as the increase of average maximum standing crop(Xmax)and the average algal special growth rate (Umax)was obviously stimulated by adding 0.2mg/L La(Ⅲ),Gd(Ⅲ),Y(Ⅲ)alone,but there did not show any stimulation effects when adding mixed REEs.When these three REEs were added together with phosphorous (HPO42-),synergism for algal growth showed only in the lowest concentration (0.2mg/L) test. |
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