Mobilization and deposition of iron nano and sub-micrometer particles in porous media: A glass micromodel study
- Mobilization and deposition of iron nano and sub-micrometer particles in porous media: A glass micromodel study
- Qiliang Wang; 이중협; 정성우; 장암; 이상협; 최희철
- Iron nanoparticles; Glass micromodel; Mobilization-deposition; Humic substances; DLVO theory
- Issue Date
- Journal of hazardous materials
- VOL 192, NO 3, 1466-1475
- Mobilization and deposition of iron nano and sub-micrometer particles (INSMP) in a porous medium were
investigated using a water-saturated glass micromodel. The deposition and detachment of INSMP in the
micromodel were visualized by taking serial images and experimentally verified by analysis of breakthrough
curves. This first visualization study of INSMP fate showed that there were dense aggregations at
the pores as the concentration of INSMP increased. The presence of dissolved humic substances (>1 ppm)
significantly reduced deposition of suspended particles and enhanced detachment of the deposited particles.
The mobility of INSMP in the presence of Pahokee peat fulvic acid standard II (PPFA) was higher
than for Pahokee peat humic acid standard I (PPHA) due to the presence of more aromatic groups and
the molecular weight in PPFA. Interfacial energy estimation based on the DLVO theory revealed that the
adsorption of humic substances onto the INSMP increased the energy barrier and reduced the depth of
secondary minimum between particles. The “affinity transition” in the initial deposition of INSMP within
the micromodel was observed in the presence of Pahokee peat humic substances.
- Appears in Collections:
- KIST Publication > Article
- Files in This Item:
There are no files associated with this item.
- RIS (EndNote)
- XLS (Excel)
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.