外源性稀土La和Ce对几种淡水微藻生长影响的研究  

Effects of External Rare-Earth Lanthanum and Cerium on Growth Characteristics of Algae in Fresh Water

作　　者：葛新华[1] 储昭升[1] 金相灿[1] 赵承易[2] 胡小贞[1] 张淑英[1] 

机构地区：[1]中国环境科学研究院湖泊生态环境创新基地,北京100012 [2]北京师范大学化学系,北京100086

出　　处：《环境科学研究》2004年第z1期66-69,共4页Research of Environmental Sciences

基　　金：国家重点基础研究发展计划项目(2002CB412301)

摘　　要：通过模拟培养实验,研究了不同质量浓度的稀土元素La3+和Ce3+对2种产地的微囊藻以及月牙藻增殖的影响。结果表明:低质量浓度的La3+和Ce3+对2种微囊藻的刺激作用明显大于对月牙藻的刺激作用,说明稀土元素La3+和Ce3+在湖泊中的富集可能改变湖泊种群结构,有利于微囊藻在湖泊中形成优势种;高质量浓度的La3+和Ce3+对3种藻均有抑制生长的作用,当La3+和Ce3+的质量浓度为50 0mg L时,微囊藻的生长繁殖完全被抑制。The effects of rare-earth elements lanthanum (La^(3+)) and cerium (Ce^(3+)) at different mass concentrations on the growth of Microcystis and Selenastram bibrainum Reinsch in fresh water were studied by stimulated test in laboratory. The result showed that lower mass concentration of rare-earth elements exerted obviously more stimulation on Microcystis at two sites than on Selenastram bibrainum Reinsch. This suggested that the accumulation of La^(3+) and Ce^(3+) in the lake might change the population structure in the lake, facilitating the form of dominant species in the lake. Higher mass concentration of La^(3+) and Ce^(3+) restrained the growth of all the three algae. The La^(3+) and Ce^(3+) at the mass concentration of 50.0 mg/L could completely restrain the growth of Microcystis.

关 键 词：稀土元素 La CE 微囊藻 月牙藻 

分 类 号：X172[环境科学与工程—环境科学]