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Enhanced biodegradation of pyrene by immobilized bacteria on modified biomass materials
- Source :
- International Biodeterioration & Biodegradation. 110:46-52
- Publication Year :
- 2016
- Publisher :
- Elsevier BV, 2016.
-
Abstract
- The degradation of pyrene (PYR) by Mycobacterium gilvum immobilized on peanut shell powder (PSP) was improved by chemically modifying the PSP. The physicochemical properties of the modified biomass (M-PSP) were characterized with surface area analysis, X-ray diffraction, Fourier transform infrared and solid-state CP/MAS 13C NMR spectra. The results showed that the chemical modification decreased the crystallinity of the biomass and destroyed the benzene rings in the cellulose, which improved the porosity of PSP. Fluorescein diacetate activity (FDA) of cells immobilized on the M-PSP decreased more slowly than cells immobilized on PSP. The PYR degradation efficiencies achieved by bacteria immobilized on M-PSP was higher than that achieved by immobilized bacteria on PSP after 7 d. It revealed that chemical modification of biomass could further improve bacterial activity and enhance the degradation ability of the cells compared with the raw one, as we expected. In summary, this study shows that M-PSP is a good immobilizing bio-mass for supporting pollutant-degrading bacteria and could be employed as an effective material for PYR biodegradation.
- Subjects :
- 0106 biological sciences
Mycobacterium gilvum
biology
Biomass
Chemical modification
010501 environmental sciences
Biodegradation
biology.organism_classification
01 natural sciences
Microbiology
eye diseases
Biomaterials
chemistry.chemical_compound
chemistry
010608 biotechnology
Degradation (geology)
Organic chemistry
Pyrene
Cellulose
Waste Management and Disposal
Bacteria
0105 earth and related environmental sciences
Nuclear chemistry
Subjects
Details
- ISSN :
- 09648305
- Volume :
- 110
- Database :
- OpenAIRE
- Journal :
- International Biodeterioration & Biodegradation
- Accession number :
- edsair.doi...........a080a3b6715cecd72a067dc29a1aa5de