Bacteria-immobilized electrospun fibrous polymeric webs for hexavalent chromium remediation in water
Date
2016Source Title
International Journal of Environmental Science and Technology
Print ISSN
1735-1472
Electronic ISSN
1735-2630
Publisher
Springer Berlin Heidelberg
Volume
13
Issue
8
Pages
2057 - 2066
Language
English
Type
ArticleItem Usage Stats
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Abstract
The development of hexavalent chromium remediating fibrous biocomposite mats through the immobilization of a hexavalent chromium reducing bacterial strain, Morganella morganiiSTB5, on the surfaces of electrospun polystyrene and polysulfone webs is described. The bacteria-immobilized biocomposite webs have shown removal yields of 93.60 and 93.79 % for 10 mg/L, 99.47 and 90.78 % for 15 mg/L and 70.41 and 68.27 % for 25 mg/L of initial hexavalent chromium within 72 h, respectively, and could be reused for at least five cycles. Storage test results indicate that the biocomposite mats can be stored without losing their bioremoval capacities. Scanning electron microscopy images of the biocomposite webs demonstrate that biofilms of M. morganii STB5 adhere strongly to the fibrous polymeric surfaces and are retained after repeated cycles of use. Overall, the results suggest that reusable bacteria-immobilized fibrous biocomposite webs might be applicable for continuous hexavalent chromium remediation in water systems.
Keywords
BioremovalElectrospinning
Polystyrene
Polysulfone
Bacteria
Composite materials
Electrospinning
Polymers
Polystyrenes
Polysulfones
Remediation
Scanning electron microscopy
Bacterial strains
Bio-composites
Bioremoval
Hexavalent chromium
Polymeric surfaces
Repeated cycle
Scanning electron microscopy image
Storage tests
Chromium
Bacterium
Biofilm
Bioremediation
Chromium
Immobilization
Life cycle analysis
Pollutant removal
Polymer
Scanning electron microscopy
Water pollution
Bacteria (microorganisms)
Morganella morganii