Carbonate minerals in porous media decrease mobility of polyacrylic acid modified zero-valent iron nanoparticles used for groundwater remediation
- Author(s)
- Thilo Hofmann, Susanne Laumann, Vesna Micic Batka, Gregory Victor Lowry
- Abstract
The limited transport of nanoscale zero-valent iron (nZVI) in porous media is a major obstacle to its widespread application for in situ groundwater remediation. Previous studies on nZVI transport have mainly been carried out in quartz porous media. The effect of carbonate minerals, which often predominate in aquifers, has not been evaluated to date. This study assessed the influence of the carbonate minerals in porous media on the transport of polyacrylic acid modified nZVI (PAA-nZVI). Increasing the proportion of carbonate sand in the porous media resulted in less transport of PAA-nZVI. Predicted travel distances were reduced to a few centimeters in pure carbonate sand compared to approximately 1.6 m in quartz sand. Transport modeling showed that the attachment efficiency and deposition rate coefficient increased linearly with increasing proportion of carbonate sand.
- Organisation(s)
- External organisation(s)
- Carnegie Mellon University
- Journal
- Environmental Pollution
- Volume
- 179
- Pages
- 53-60
- No. of pages
- 8
- ISSN
- 0269-7491
- Publication date
- 2013
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 210006 Nanotechnology, 104002 Analytical chemistry, 104023 Environmental chemistry, 105904 Environmental research
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/cf43c49f-4c87-4bfb-be95-62c10a44385b