摘要
采用化学萃取技术进行自然水体中培养的生物膜上各组分的分离 ,从而为探讨水体中生物膜各组分对重金属的迁移转化规律的影响准备条件 .经过对多种萃取剂和萃取条件的选择实验 ,以选定的萃取剂和萃取条件对目的组分的萃取率分别达到 91%～ 97% ,同时对非目的组分的影响较小 (损失率为 4.8%～ 7.3% ) ,基本上满足对锰。
Chemical extraction was applied, as an approach, to separating the metal oxides and organic matters from natural biofilms. The results show that the optimum condition for the extraction of manganese oxides was 0.02 mol/L NH 2OH·HCl, 0.01 mol/L HNO 3 for 20 min; pH 6.0 and 0.4 mol/L Na 2S 2O 4 were the optimum condition for the extraction of manganese and iron oxides together for 30 min; 15% HNO 3 was the optimum condition for the extraction of all the metal oxides and organic matters for 24 h . Under these conditions, the extraction efficiencies of target components reached up to 91%~97%. Meanwhile the effect of the selected extractor and extraction conditions on in target components was very small (only 4.8%~7.3% lost).
出处
《吉林大学自然科学学报》
CAS
CSCD
2000年第4期71-74,共4页
Acta Scientiarum Naturalium Universitatis Jilinensis
基金
教育部"创新人才培养计划"基金! (批准号 :教技函 [1999] 2号 )
"高等学校骨干教师资助计划"基金 !(批准号 :教技司[2 0 0 0 ] 65)
关键词
生物膜
选择性萃取
水环境
重金属元素
biofilm
selective components
iron oxides
manganese oxides
