Lead-resistant Providencia alcalifaciens strain 2EA bioprecipitates Pb+2 as lead phosphate.
Lett Appl Microbiol
; 56(2): 99-104, 2013 Feb.
Article
in En
| MEDLINE
| ID: mdl-23163530
ABSTRACT
A lead-resistant bacteria isolated from soil contaminated with car battery waste were identified as Providencia alcalifaciens based on biochemical characteristics, FAME profile and 16S rRNA sequencing and designated as strain 2EA. It resists lead nitrate up to 0·0014 mol l(-1) by precipitating soluble lead as insoluble light brown solid. Scanning electron microscopy coupled with energy-dispersive X-ray spectrometric analysis (SEM-EDX) and X-ray diffraction spectroscopy (XRD) revealed extracellular light brown precipitate as lead orthophosphate mineral, that is, Pb(9) (PO(4))(6) catalysed by phosphatase enzyme. This lead-resistant bacterial strain also demonstrated tolerance to high levels of cadmium and mercury along with multiple antibiotic resistance. Providencia alcalifaciens strain 2EA could be used for bioremediation of lead-contaminated environmental sites, as it can efficiently precipitate lead as lead phosphate.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Soil Microbiology
/
Soil Pollutants
/
Providencia
/
Lead
Type of study:
Prognostic_studies
Language:
En
Journal:
Lett Appl Microbiol
Journal subject:
MICROBIOLOGIA
Year:
2013
Document type:
Article
Affiliation country:
India