Corrosion rate estimations of microscale zerovalent iron particles via direct hydrogen production measurements
- Author(s)
- Milica Velimirovic, Luca Carniato, Queenie Simon, Geritt Schoups, Piet Seuntjens, Leen Bastiaens
- Abstract
In this study, the aging behavior of microscale zerovalent iron (mZVI) particles was investigated byquantifying the hydrogen gas generated by anaerobic mZVI corrosion in batch degradation experiments.Granular iron and nanoscale zerovalent iron (nZVI) particles were included in this study as controls.Firstly, experiments in liquid medium (without aquifer material) were performed and revealed that mZVIparticles have approximately a 10–30 times lower corrosion rate than nZVI particles. A good correlation was found between surface area normalized corrosion rate (RSA) and reaction rate constants (kSA) of PCE,TCE, cDCE and 1,1,1-TCA. Generally, particles with higher degradation rates also have faster corrosion rates, but exceptions do exists. In a second phase, the hydrogen evolution was also monitored during batch tests in the presence of aquifer material and real groundwater. A 4–9 times higher corrosion rate ofmZVI particles was observed under the natural environment in comparison with the aquifer free artificial condition, which can be attributed to the low pH of the aquifer and its buffer capacity. A corrosion model was calibrated on the batch experiments to take into account the inhibitory effects of the corrosion products (dissolved iron, hydrogen and OH−) on the iron corrosion rate.
- Organisation(s)
- External organisation(s)
- Flemish Institute for Technological Research (VITO), Delft University of Technology
- Journal
- Journal of Hazardous Materials
- Volume
- 270
- Pages
- 18-26
- No. of pages
- 9
- ISSN
- 0304-3894
- DOI
- https://doi.org/10.1016/j.jhazmat.2014.01.034
- Publication date
- 01-2014
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 104023 Environmental chemistry, 104002 Analytical chemistry, 105904 Environmental research, 210006 Nanotechnology
- Keywords
- ASJC Scopus subject areas
- Pollution, Waste Management and Disposal, Health, Toxicology and Mutagenesis, Environmental Engineering, Environmental Chemistry
- Sustainable Development Goals
- SDG 7 - Affordable and Clean Energy
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/a4a99f1f-b45a-4978-892c-36a4b3a1ded0