Arsenic (III) oxidizing Microbacterium lacticum and its use in the treatment of arsenic contaminated groundwater.
Lett Appl Microbiol
; 34(4): 258-62, 2002.
Article
em En
| MEDLINE
| ID: mdl-11940155
ABSTRACT
AIMS:
To develop a microbially-assisted process for the removal of arsenic from contaminated groundwater. METHODS ANDRESULTS:
A culture of Microbacterium lacticum oxidizing up to 50 mmol l(-1) arsenic (III) was isolated from municipal sewage by an enrichment culture technique. Using culture immobilized on brick pieces and packed in a glass column, complete oxidation of As (III) from groundwater could be quickly achieved at neutral pH and ambient temperature with methanol as substrate. The oxidized As species were removed from groundwater using three differentmethods:
zero valent iron, activated charcoal and ferric chloride.CONCLUSIONS:
The oxidation of groundwater As (III) by a M. lacticum-immobilized column, followed by its removal using activated carbon, could be an efficient method for the treatment of As (III)-contaminated groundwater. SIGNIFICANCE AND IMPACT OF THE STUDY The study will be useful in developing a combined microbiological-chemical process for treating arsenic-contaminated groundwater.
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Base de dados:
MEDLINE
Assunto principal:
Arsênio
/
Poluentes Químicos da Água
/
Actinomycetales
/
Água Doce
Idioma:
En
Ano de publicação:
2002
Tipo de documento:
Article