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）能显著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（ＨＰＯ２－４，０．０４ｍｇ／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．
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(max)and the average algal special growth rate (max)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 (HPO2-4),synergism for algal growth showed only in the lowest concentration (0.2mg/L) test.
出处
《环境科学》
EI
CAS
CSSCI
CSCD
北大核心
1998年第5期56-59,共4页
Environmental Science
基金
国家自然科学基金
关键词
富营养化
稀土元素
藻类增长太湖
增长率
eutrophication,rare earth elements (REEs),algal growth,Taihu Lake,average maximum standing crop,average algal special growth rate.
