Reference : Effect of metal ions and metal nanoparticles encapsulated in porous silica on bipheny...
Scientific journals : Article
Life sciences : Biotechnology
Life sciences : Environmental sciences & ecology
Engineering, computing & technology : Materials science & engineering
http://hdl.handle.net/2268/181635
Effect of metal ions and metal nanoparticles encapsulated in porous silica on biphenyl biodegradation by Rhodococcus erythropolis T902.1
English
Wannoussa, Wissal* mailto [Université de Liège - ULiège > > > Doct. sc. (bioch., biol. mol.&cell., bioinf.&mod.-Bologne)]
Hiligsmann, Serge* mailto [Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Bio-industries >]
Tasseroul, Ludivine mailto [Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Bio-industries >]
Masy, Thibaut mailto [Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Bio-industries >]
Lambert, Stéphanie mailto [Université de Liège > Département de chimie appliquée > Génie chimique - Nanomatériaux et interfaces >]
Heinrichs, Benoît mailto [Université de Liège > Département de chimie appliquée > Génie chimique - Nanomatériaux et interfaces >]
Al-Ahmad, Alaa Eddin [Université de Liège - ULiège > Département des sciences de la vie > Biochimie et microbiologie industrielles > >]
Weekers, Frédéric mailto [Artechno SA > > > >]
Thonart, Philippe mailto [Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Bio-industries >]
* These authors have contributed equally to this work.
2015
Journal of Sol-Gel Science and Technology
Springer
75
235-245
Yes (verified by ORBi)
International
0928-0707
1573-4846
Boston
MA
[en] Biodegradation ; Biphenyl ; Rhodococcus erythropolis ; Sol–gel process ; Encapsulated nanoparticles
[en] Biodegradation of biphenyl was carried out by Rhodococcus erythropolis T902.1 in presence ofnanometer-sized metallic (Co, Pd, Ag and Cu) nanoparticles (NPS) synthesized by the sol-gel process. In order to
<br />prevent their agglomeration, the metallic NPs (1-2 nm diameter) were anchored inside microporous silica crystallites and named Co/SiO2, Pd/SiO2, Ag/SiO2 and Cu/SiO2 samples respectively. They were added at low concentrations of 10-6 M, 10-5 M and 10-4 M of metal in the culture medium and their impact was compared with that of the simple metal ions added as cobalt, palladium, silver or copper salts. The cultures containing Pd/SiO2 or Co/SiO2 samples at 10-4 M of metal achieved a 50% higher biphenyl degradation yield after 18 days of incubation and improved Rhodococcus erythropolis T902.1 growth compared with those without (positive control) or with silica particles only. The highest biodegradation performance, i.e. 107 ±3 ppm/day, which was about 85% higher than in control conditions without NPs, was recorded in 250 ml baffled flasks stirred at 150 rpm with Co/SiO2 sample at 10-4 M Co. Furthermore, the stimulating effect of NPs on biphenyl biodegradation seems to also depend on the thermal treatment conditions applied to NPs since the experimental results indicated that, after calcination, the cobalt oxide NPs at a concentration of 10-4 M were more effective than the reduced cobalt NPs with a degradation yield of 81 ±1% and 77 ±2% respectively after 18 days. On the other hand, the results showed that the addition of 10-4 M of Cu2+ or Ag+ ions or the addition of Cu/SiO2 or Ag/SiO2 samples at 10-4 M of metal have an inhibitory effect on biphenyl biodegradation. However, Cu2+ and Ag+ ions were more toxic to the Rhodococcus erythropolis T902.1 bacteria than the respective Cu or Ag NPS anchored inside silica particles. Moreover, this work showed that in these
<br />conditions, the activity of catechol 1, 2-dioxygenase (a critical enzyme in aromatic biodegradation pathway) was severely inhibited, whereas the presence of 10-4 M of Co2+ ions or Co/SiO2 sample stimulated the enzyme activity compared to the conditions without NPs.
Centre Wallon de Biologie Industrielle ; Laboratory of Chemical Engineering ; Artechno SA
DGTRE - Région wallonne. Direction générale des Technologies, de la Recherche et de l'Energie
NANOMICRO : nanoparticles for hydrocarbons (PAH) bioremediation
Researchers ; Professionals ; Students ; General public
http://hdl.handle.net/2268/181635
also: http://hdl.handle.net/2268/183788
10.1007/s10971-015-3694-4
http://reflexions.ulg.ac.be/cms/c_388409/en/microorganisms-and-nanoparticles

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