Microbially-mediated glass dissolution and sorption of metals by Pseudomonas aeruginosa cells and biofilm

Journal of Hazardous Materials
Georges AouadPeter Stille

Abstract

A basaltic glass and a vitrified bottom ash were incubated at 25 degrees C in a growth medium (based on casaminoacids) inoculated with Pseudomonas aeruginosa. Bacterial growth and mineral concentrations in different compartments (bacterial cells, growth medium and biofilm) were monitored in short-term (3 days), and long-term experiments involving repeated renewals of the culture medium during 174 days. In short-term experiments, while the concentration of iron increased in the presence of bacteria, a decrease in Ni and Zn was observed in the growth medium compared to the sterile condition. During long-term experiments, such differences gradually decreased and disappeared after 78 days. On the contrary, iron concentration remained higher in the biotic condition compared to the sterile one. Bacterial growth resulted within a few days in the formation of a biofilm, which lead to the cementation of the altered glass grains. Most of the constituents of the glass (Si, Mg, Fe, Ti, Ba, Co, Zn, Cu, Ni and Cr) were found in the biofilm, while the chemical composition of the bacterial cells was very different.

Citations

Mar 27, 2007·Applied and Environmental Microbiology·Sandra Da ReChristophe Beloin
Oct 4, 2014·Journal of Environmental Management·Eric D van HullebuschYann Sivry
Feb 12, 2008·The Science of the Total Environment·G AouadV A Geoffroy
Nov 26, 2010·Bioresource Technology·Yonghong WuPhilip G Kerr
Jan 4, 2017·World Journal of Microbiology & Biotechnology·Jean-Yves CornuThierry Lebeau
Jan 1, 2018·International Journal of Applied Glass Science·Jamie L WeaverAlbert A Kruger

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