Effects of silver-graphene oxide nanocomposites on soil microbial communities

Min Ji Kim, Daegeun Ko, Kwanyoung Ko, Dawon Kim, Ji Yeon Lee, Sang Myeong Woo, Woong Kim, Haegeun Chung

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Due to the application of silver-graphene oxide (Ag-GO) in diverse fields, it is important to investigate its potential impacts on the environment including soils. In this study, the response of microbial communities in soils treated with Ag-GO synthesized by glucose reduction was determined by analyzing enzyme activities, biomass, and inorganic N concentrations and by pyrosequencing. In soils treated with 0.1–1 mg Ag-GO g−1 soil, the activities of β-glucosidase, cellobiohydrolase, and xylosidase decreased up to 80% and NO3 concentration decreased up to 82% indicating inhibited nitrification. Within the bacterial community, the relative abundance of Acidobacteria and Cyanobacteria in soils treated with Ag-GO were lower than that in control soil. Meanwhile, the relative abundance of AD3 and Firmicutes tended to increase under Ag-GO treatments. These changes in bacterial community composition reflected lowered activities associated with C and N cycling. On the other hand, microbial biomass showed no distinct change in response to Ag-GO treatment. Our study can serve as important basis in establishing guidelines for regulating the release of nanocomposites such as Ag-GO to the soil environment.

Original languageEnglish
Pages (from-to)93-102
Number of pages10
JournalJournal of Hazardous Materials
Volume346
DOIs
Publication statusPublished - 2018 Mar 15

Keywords

  • Microbial biomass
  • Nanomaterial
  • Pyrosequencing
  • Soil enzyme
  • Soil incubation

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

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