Carbonate minerals in porous media decrease mobility of polyacrylic acid modified zero-valent iron nanoparticles used for groundwater remediation

Autor(en)

Thilo Hofmann, Susanne Laumann, Vesna Micic Batka, Gregory Victor Lowry

Abstrakt

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(en)

Externe Organisation(en)

Carnegie Mellon University

Journal

Environmental Pollution

Band

179

Seiten

53-60

Anzahl der Seiten

8

ISSN

0269-7491

Publikationsdatum

2013

Peer-reviewed

Ja

ÖFOS 2012

210006 Nanotechnologie, 104002 Analytische Chemie, 104023 Umweltchemie, 105904 Umweltforschung

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/cf43c49f-4c87-4bfb-be95-62c10a44385b