A carregar...
Publicação
Mechanism of uranium (VI) removal by two anaerobic bacterial communities
| Nome: | Descrição: | Tamanho: | Formato: | |
|---|---|---|---|---|
| 974.82 KB | Adobe PDF |
Orientador(es)
Resumo(s)
The mechanism of uranium (VI) removal by two anaerobic bacterial consortia, recovered from an uncontaminated
site (consortium A) and other from an uranium mine (consortium U), was investigated. The
highest efficiency of U (VI) removal by both consortia (97%) occurred at room temperature and at pH
7.2. Furthermore, it was found that U (VI) removal by consortium A occurred by enzymatic reduction
and bioaccumulation, while the enzymatic process was the only mechanism involved in metal removal
by consortium U. FTIR analysis suggested that after U (VI) reduction, U (IV) could be bound to carboxyl,
phosphate and amide groups of bacterial cells. Phylogenetic analysis of 16S rRNA showed that community
A was mainly composed by bacteria closely related to Sporotalea genus and Rhodocyclaceae family,
while community U was mainly composed by bacteria related to Clostridium genus and Rhodocyclaceae
family.
Descrição
Palavras-chave
Bioremediation Uranium (VI) Bio-removal mechanism Bacterial consortia
Contexto Educativo
Citação
Journal of Hazardous Materials 184 (2010) 89–96
Editora
Elsevier