Heinrichs, B., Rebbouh, L., Geus, J.W., Lambert, S., Abbenhuis, H.C.L., Grandjean, F., Long, G.J., Pirard, J.P. and van Santen, R.A. (2008) Iron(III) Species Dispersed in Porous Silica through Sol-Gel Chemistry. Journal of Non-Crystalline Solids, 354, 665-672.
http://dx.doi.org/10.1016/j.jnoncrysol.2007.07.071

has been cited by the following article:

• TITLE: Effect of Iron Nanoparticles Synthesized by a Sol-Gel Process on Rhodococcus erythropolis T902.1 for Biphenyl Degradation

  AUTHORS: Wissal Wannoussa, Thibaut Masy, Stéphanie D. Lambert, Benoît Heinrichs, Ludivine Tasseroul, Alaaeddin Al-Ahmad, Frédéric Weekers, Philippe Thonar, Serge Hiligsmann

  KEYWORDS: Biodegradation, Biphenyl, Rhodococcus erythropolis, Encapsulated Nanoparticles, Sol-Gel, Iron

  JOURNAL NAME: Journal of Water Resource and Protection, Vol.7 No.3, February 27, 2015

  ABSTRACT: Nanoparticles (NPS) are considered as a new generation of compounds to improve environmental remediation and biological processes. The aim of this study is to investigate the effect of iron NPS encapsulated in porous silica (SiO2) on the biphenyl biodegradation by Rhodococcus erythropolis T902.1 (RT902.1). The iron NPS (major iron oxide FexOy form) were dispersed in the porosity of a SiO2 support synthesized by sol-gel process. These Fe/SiO2 NPS offer a stimulating effect on the biodegradation rate of biphenyl, an organic pollutant that is very stable and water-insoluble. This positive impact of NPS on the microbial biodegradation was found to be dependent on the NPS concentration ranging from 10-6 M to 10-4 M. After 18 days of incubation the cultures containing NPS at a concentration of 10-4 M of iron improved RT902.1 growth and degraded 35% more biphenyl than those without NPS (positive control) or with the sole SiO2 particles. Though the microorganism could not interact directly with the insoluble iron NPS, the results show that about 10% and 35% of the initial 10-4 M iron NPS encapsulated in the SiO2 matrix would be incorporated inside or adsorbed on the cell surface respectively and 35% would be released in the supernatant. These results suggest that RT902.1 would produce siderophore-like molecules to attract iron from the porous silica matrix.