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Size dependent and reactive oxygen species related nanosilver toxicity to nitrifying bacteria.
It was observed that inhibition to nitrifying organisms correlated with the fraction of Ag nanoparticles less than 5 nm in the suspension, and it appeared that these size nanoparticles could be more toxic to bacteria than any other fractions of nanoparticles or their counterpart bulk species. Expand
The inhibitory effects of silver nanoparticles, silver ions, and silver chloride colloids on microbial growth.
- O. Choi, Kathy Kanjun Deng, Nam-Jung Kim, Louis M. Ross, R. Surampalli, Zhiqiang Hu
- Chemistry, Medicine
- Water research
- 1 June 2008
The results suggest that nitrifying bacteria are especially susceptible to inhibition byAg NPs, and the accumulation of Ag NPs could have detrimental effects on the microorganisms in wastewater treatment. Expand
Interactions of nanosilver with Escherichia coli cells in planktonic and biofilm cultures.
Nanosilver was aggregated in the presence of planktonic or biofilm-forming cells resulting in an increase of average particle size by a factor of 15 and 40, respectively, which suggested that biofilm resistance to nanosilver could be at least partially due to nanoparticle aggregation and retarded silver ion/particle diffusion. Expand
Electricity-driven metabolic shift through direct electron uptake by electroactive heterotroph Clostridium pasteurianum
This work shows that Clostridium pasteurianum DSM 525 simultaneously utilizes both cathode and substrate as electron donors through direct electron transfer, opening up the possibility of efficient and enhanced production of electron-dense metabolites using electricity. Expand
Role of sulfide and ligand strength in controlling nanosilver toxicity.
- O. Choi, T. Clevenger, B. Deng, R. Surampalli, Louis M. Ross, Zhiqiang Hu
- Chemistry, Medicine
- Water research
- 1 April 2009
While the biotic ligand model was successful in predicting theoxicity of Ag(+) ions, it could not accurately predict the toxicity of AgNPs, and could be one of the many tools useful in predicting and controlling nanosilver toxicity to wastewater microorganisms. Expand
Butyrate production enhancement by Clostridium tyrobutyricum using electron mediators and a cathodic electron donor
Results show that the electron flow altered NADH formation by electron mediators and by the cathodic electron donor, increasing the yield and selectivity of reduced end‐products like butyrate. Expand
Extracellular electron transfer from cathode to microbes: application for biofuel production
The extensively studied exoelectrogenic bacteria Shewanella and Geobacter showed that both directions for electron transfer would be possible and could catalyze various bioelectrochemical reductions. Expand
Nitrification inhibition by silver nanoparticles.
It is suggested thatSilver nanoparticles have the same behaviour of surface complexation as silver ions, and inhibition by nanosilver in wastewater treatment may be removed by reaction of silver nanoparticles with soluble sulfide species. Expand
A pilot scale two-stage anaerobic digester treating food waste leachate (FWL): Performance and microbial structure analysis using pyrosequencing
It is suggested that acetoclastic methanogens and their associated bacteria were more efficient for VS removal in the pilot scale ADS system, providing useful information for FWL treatment in a large scale ADS. Expand
Pretreatment strategies for enhanced biogas production from lignocellulosic biomass.
Four modes of pretreatment on lignocellulosic biomass and their impact on biogas production process is the major focus of this review article. Expand