Effect of metal oxide nanoparticles on microbial community structure and function in two different soil types

PloS One
Sammy FrenkDror Minz

Abstract

Increased availability of nanoparticle-based products will, inevitably, expose the environment to these materials. Engineered nanoparticles (ENPs) may thus find their way into the soil environment via wastewater, dumpsters and other anthropogenic sources; metallic oxide nanoparticles comprise one group of ENPs that could potentially be hazardous for the environment. Because the soil bacterial community is a major service provider for the ecosystem and humankind, it is critical to study the effects of ENP exposure on soil bacteria. These effects were evaluated by measuring bacterial community activity, composition and size following exposure to copper oxide (CuO) and magnetite (Fe3O4) nanosized (<50 nm) particles. Two different soil types were examined: a sandy loam (Bet-Dagan) and a sandy clay loam (Yatir), under two ENP concentrations (1%, 0.1%). Results indicate that the bacterial community in Bet-Dagan soil was more susceptible to change due to exposure to these ENPs, relative to Yatir soil. More specifically, CuO had a strong effect on bacterial hydrolytic activity, oxidative potential, community composition and size in Bet-Dagan soil. Few effects were noted in the Yatir soil, although 1% CuO exposure did cause a significan...Continue Reading

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Datasets Mentioned

BETA
ERP001973

Methods Mentioned

BETA
scanning
X-ray
acid titration
PCR
electrophoresis
enzymatic assay
454 sequencing
16S sequencing

Software Mentioned

Silva
AMOVA
MOTHUR
Metastats
MO
SPSS
ENP

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