UPTAKE, TRANSFORMATION AND FIXATION OF SE(VI) BY A MIXED SELENIUM-TOLERANT ECOSYSTEM

被引:26
作者
BENDER, J
GOULD, JP
VATCHARAPIJARN, Y
SAHA, G
机构
[1] GEORGIA INST TECHNOL,SCH CIVIL ENGN,ATLANTA,GA 30332
[2] CLARK ATLANTA UNIV,DEPT CHEM,ATLANTA,GA 30314
关键词
D O I
10.1007/BF00211843
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The uptake, transformation and fate of Se, added as selenate to a mixed microbial ecosystem containing Se-tolerant bacteria and cyanobacteria, has been studied in simulated laboratory ponds. There was evidence of concerted activities of the microbial community in the system. Motile bacteria were responsible for transport into a surface mat and the combined actions of the microbial consortium provide chemical conditions under which the Se could be reduced to the elemental form and physically entrained in the mat. Strong qualitative indications of the formation of volatile alkylselenium compounds were also observed. The removal of Se from the water column was rapid and essentially quantitative. The advantages of such biological ecosystems for remediation of Se-contamined aquatic ecosystems are discussed.
引用
收藏
页码:359 / 367
页数:9
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