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Environmental Science and Pollution Research

, Volume 24, Issue 21, pp 17769–17778 | Cite as

Enhanced removal of ethanolamine from secondary system of nuclear power plant wastewater by novel hybrid nano zero-valent iron and pressurized ozone initiated oxidation process

  • Son Dong Lee
  • Srinivasa Reddy MallampatiEmail author
  • Byoung Ho LeeEmail author
Research Article
  • 205 Downloads

Abstract

Monoethanolamine (shortly ethanolamine (ETA)), usually used as a corrosion inhibitor, is a contaminant of wastewater from the secondary cooling system of nuclear power plants (NPPs) and is not readily biodegradable. We conducted various experiments, including treatments with nano zero-valent iron (nZVI), nano-iron/calcium, and calcium oxide (nFe/Ca/CaO) with ozone (O3) or hydrogen peroxide (H2O2) to reduce the concentration of ETA and to decrease the chemical demand of oxygen (COD) of these wastewaters. During this study, wastewater with ETA concentration of 7465 mg L−1 and COD of 6920 mg L−1 was used. As a result, the ETA concentration was reduced to 5 mg L−1 (a decrease of almost 100%) and COD was reduced to 2260 mg L−1, a reduction of 67%, using doses of 26.8 mM of nZVI and 1.5 mM of H2O2 at pH 3 for 3 h. Further treatment for 48 h allowed a decrease of COD by almost 97%. Some mechanistic considerations are proposed in order to explain the degradation pathway. The developed hybrid nano zero-valent iron-initiated oxidation process with H2O2 is promising in the treatment of ETA-contaminated wastewaters.

Keywords

Ethanolamine (ETA) Nano zero-valent iron Nuclear power plant wastewater Pressurized ozonation Oxidation process 

Notes

Acknowledgments

We are thankful to National Research Foundation of Korea (NRF) and Japan Society for the Promotion of Science (JSPS), for providing financial support for this study through the collaborative research project (2016K2A2A4003740).

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Copyright information

© Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  1. 1.Department of Civil and Environmental EngineeringUniversity of UlsanUlsanRepublic of Korea

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