Membrane and Water Treatment

  • 제13권1호
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  • Pages.29-37
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  • 2022
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  • 2005-8624(pISSN)
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  • 2092-7037(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Engineered nanoparticles in wastewater systems: Effect of organic size on the fate of nanoparticles

  • Choi, Soohoon (Department of Civil and Environmental engineering, University of Delaware) ;
  • Chen, Ching-Lung (Department of Civil and Environmental engineering, University of Delaware) ;
  • Johnston, Murray V. (Department of Chemistry and Biochemistry, University of Delaware) ;
  • Wang, Gen Suh (Institute of Environmental Health, National Taiwan University) ;
  • Huang, Chin-Pao (Department of Civil and Environmental engineering, University of Delaware)
  • 투고 : 2021.05.31
  • 심사 : 2021.09.03
  • 발행 : 2022.01.25
⟨ 이전 논문 다음 논문 ⟩

초록

To verify the fate and transport of engineered nanoparticles (ENP), it is essential to understand its interactions with organic matter. Previous research has shown that dissolved organic matter (DOM) can increase particle stability through steric repulsion. However, the majority of the research has been focused on model organic matter such as humic or fulvic acids, lacking the understanding of organic matter found in field conditions. In the current study, organic matter was sampled from wastewater treatment plants to verify the stability of engineered nanoparticles (ENP) under field conditions. To understand how different types of organic matter may affect the fate of ENP, wastewater was sampled and separated based on their size; as small organic particular matter (SOPM) and large organic particular matter (LOPM), and dissolved organic matter (DOM). Each size fraction of organic matter was tested to verify their effects on nano-zinc oxide (nZnO) and nano-titanium oxide (nTiO2) stability. For DOM, critical coagulation concentration (CCC) experiments were conducted, while sorption experiments were conducted for organic particulates. Results showed that under field conditions, the surface charge of the particles did not influence the stability. On the contrary, surface charge of the particles influenced the amount of sorption onto particulate forms of organic matter. Results of the current research show how the size of organic matter influences the fate and transport of different ENPs under field conditions.

키워드

과제정보

We thank Dr. Rovshan Madmudov and Mr. Michael Davidson for assistance with the ICP throughout the entire research. This work was supported by a STAR grant R83485901 by the US Environmental Protection Agency. The work was also supported by Chungnma National University grant 2019-0905-01. Last but not the least, we wish to thank our project managers, Dr. Nora Savage and Dr. Mitch Lasat for their interest and support of this research.

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