title: Isolation and characterization of a Lysinibacillus strain B1-CDA showing potential for bioremediation of arsenics from contaminated water.
abstract: The main objective of this study was to identify and isolate arsenic resistant bacteria that can be used for removing arsenic from the contaminated environment. Here we report a soil borne bacterium, B1-CDA that can serve this purpose. B1-CDA was isolated from the soil of a cultivated land in Chuadanga district located in the southwest region of Bangladesh. The morphological, biochemical and 16S rRNA analysis suggested that the isolate belongs to Lysinibacillus sphaericus. The minimum inhibitory concentration (MIC) value of the isolate is 500 mM (As) as arsenate. TOF-SIMS and ICP-MS analysis confirmed intracellular accumulation and removal of arsenics. Arsenic accumulation in cells amounted to 5.0 mg g(-1) of the cells dry biomass and thus reduced the arsenic concentration in the contaminated liquid medium by as much as 50%. These results indicate that B1-CDA has the potential for remediation of arsenic from the contaminated water. We believe the benefits of implementing this bacterium to efficiently reduce arsenic exposure will not only help to remove one aspect of human arsenic poisoning but will also benefit livestock and native animal species. Therefore, the outcome of this research will be highly significant for people in the affected area and also for human populations in other countries that have credible health concerns as a consequence of arsenic-contaminated water.
authors: a Systems Biology Research Center, School of Bioscience , University of Skövde , Skövde , Sweden.
authors: Aminur
authors: A
authors: Rahman
authors: Noor
authors: N
authors: Nahar
authors: Neelu N
authors: NN
authors: Nawani
authors: Jana
authors: J
authors: Jass
authors: Prithviraj
authors: P
authors: Desale
authors: Balu P
authors: BP
authors: Kapadnis
authors: Khaled
authors: K
authors: Hossain
authors: Ananda K
authors: AK
authors: Saha
authors: Sibdas
authors: S
authors: Ghosh
authors: Björn
authors: B
authors: Olsson
authors: Abul
authors: A
authors: Mandal
mesh_terms: D001151:Arsenic / Q000032:analysis / Q000378:metabolism*; D001406:Bacillaceae / Q000145:classification / Q000235:genetics / Q000302:isolation & purification* / Q000378:metabolism*; D001459:Bangladesh; D001673:Biodegradation, Environmental; D006801:Humans; D008969:Molecular Sequence Data; D010802:Phylogeny; D012988:Soil Microbiology; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000378:metabolism*
chemical_list: D014874:Water Pollutants, Chemical; D001151:Arsenic
keywords: Pollution; arsenics; bacteria; bioaccumulation; bioremediation; toxic metals