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Nano-Nd

Yongli Xu1,2,3, Liyao Zhu1,2,3,4, Raja Vukanti5

  • 1College of Mining Engineering, North China University of Science and Technology, Tangshan, 063210, Hebei, China.

Environmental Science and Pollution Research International
|June 3, 2023
PubMed
Summary
This summary is machine-generated.

Nanoparticulate neodymium oxide (nano-Nd2O3) did not impact soil bacterial diversity or composition. However, it negatively affected soil microbial functions, particularly carbon and nitrogen cycling, in a dose-dependent manner.

Keywords:
Alpha diversityBacterial communityEnzyme activityNano-Nd2O3NanoparticlesSoil

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Area of Science:

  • Environmental Science
  • Soil Science
  • Microbiology

Background:

  • Nanoparticulate neodymium oxide (nano-Nd2O3) is widely used in agriculture, industry, and medicine.
  • The environmental implications of nano-Nd2O3, especially its effects on soil ecosystems, require thorough evaluation.
  • Previous research has not fully assessed the impact of nano-Nd2O3 on soil bacterial communities' diversity, composition, and function.

Purpose of the Study:

  • To investigate the effects of varying nano-Nd2O3 concentrations on soil bacterial community alpha diversity, composition, and function.
  • To determine the dose-dependent impact of nano-Nd2O3 on soil microbial enzyme activities related to nutrient cycling.
  • To identify specific soil bacterial taxa sensitive to nano-Nd2O3 exposure.

Main Methods:

  • Soil mesocosms were amended with nano-Nd2O3 at concentrations of 0, 10, 50, and 100 mg kg-1 soil and incubated for 60 days.
  • Soil bacterial community alpha diversity and composition were analyzed on days 7 and 60.
  • Activities of six key soil enzymes involved in nutrient cycling were measured to assess community function.

Main Results:

  • Nano-Nd2O3 did not significantly alter the alpha diversity or composition of the soil bacterial community.
  • Community function was negatively impacted by nano-Nd2O3 in a dose-dependent manner.
  • Activities of beta-1,4-glucosidase (carbon cycling) and beta-1,4-n-acetylglucosaminidase (nitrogen cycling) were significantly affected by nano-Nd2O3 exposure.

Conclusions:

  • While nano-Nd2O3 does not appear to disrupt the overall structure of soil bacterial communities, it can impair essential microbial functions.
  • The observed functional changes are linked to alterations in rare and sensitive bacterial taxa, including those in the orders Isosphaerales and families Isosphaeraceae, Ktedonobacteraceae, and genus Streptomyces.
  • Findings provide crucial data for the safe application of nano-Nd2O3 in various technological fields, emphasizing the need to consider its impact on soil microbial processes.