Toxicity of Fe⁰ Nanoparticles on the Denitrifying Bacteria-Alcaligenes Eutrophus

Abstract:

The bio-toxicity of Fe⁰ nanoparticles on the denitrifying bacterial- Alcaligenes eutrophus was detected by the two methods of detecting inhibition of the growth of microorganisms and nitrification inhibition rate. The results showed that Fe⁰ nanoparticles had obvious toxicity on the growth and nitrification inhibition rate. Besides, there had distinct relationship between dose and toxicity of Fe⁰ nanoparticles. Meanwhile, we also studied effects of different kinds of Fe⁰ nanoparticles on microorganism, including bimetallic nanoparticles(nano Fe–Ni) and coated iron nanoparticles (sodium oleate–Fe⁰nanoparticles). We detected that the bio-toxicity of these three Fe⁰ nanoparticles followed the sequence of Ni-containing nanoparticles>unmodified NZVI>the sodium oleate–Fe⁰ nanoparticles. In conclusion, Fe⁰ nanoparticles had visible toxicity on the denitrifying bacterial, but we can decrease the toxicity of Fe nanoparticles by surface coating and decoration of nano-metal materials.

• Periodical: Advanced Materials Research (Volumes 343-344)
• Pages: 889-894
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.343-344.889
• Online since: September 2011
• Authors: Mei Ying Dong, Xue Wang, Fang Huang, Zhao Hui Jin, Tie Long Li
• Keywords: Fe⁰ Nanoparticles, Growth of Microorganism, Nitrification Inhibition Rate

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