Physical transformations of iron oxide and silver nanoparticles from an intermediate scale field transport study

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• 作者：Hilary P. Emerson (1)
  Ashley E. Hart (2)
  Jonathon A. Baldwin (1)
  Tyler C. Waterhouse (1)
  Christopher L. Kitchens (2)
  O. Thompson Mefford (3)
  Brian A. Powell (1)
  
• 关键词：Nanoparticle ; Fate and transport ; Soil ; Silver ; Iron oxide ; Environment
• 刊名：Journal of Nanoparticle Research
• 出版年：2014
• 出版时间：February 2014
• 年：2014
• 卷：16
• 期：2
• 全文大小：1,937 KB
• 作者单位：Hilary P. Emerson (1)
  Ashley E. Hart (2)
  Jonathon A. Baldwin (1)
  Tyler C. Waterhouse (1)
  Christopher L. Kitchens (2)
  O. Thompson Mefford (3)
  Brian A. Powell (1)
  
  1. Department of Environmental Engineering and Earth Sciences, Clemson University, Anderson, SC, USA
  2. Department of Chemical and Biomolecular Engineering, Clemson University, Anderson, SC, USA
  3. Department of Materials Science Engineering, Clemson University, Anderson, SC, USA
  
• ISSN：1572-896X

文摘

In recent years, there has been increasing concern regarding the fate and transport of engineered nanoparticles (NPs) in environmental systems and the potential impacts on human and environmental health due to the exponential increase in commercial and industrial use worldwide. To date, there have been relatively few field-scale studies or laboratory-based studies on environmentally relevant soils examining the chemical/physical behavior of the NPs following release into natural systems. The objective of this research is to demonstrate the behavior and transformations of iron oxide and silver NPs with different capping ligands within the unsaturated zone. Here, we show that NP transport within the vadose zone is minimal primarily due to heteroaggregation with soil surface coatings with results that >99?% of the NPs remained within 5?cm of the original source after 1 year in intermediate-scale field lysimeters. These results suggest that transport may be overestimated when compared to previous laboratory-scale studies on pristine soils and pure minerals and that future work must incorporate more environmentally relevant parameters.