Removal of Arsenic(III) from Groundwater by Nanoscale Zero-Valent Iron
Université Grenoble Alpes · Gwangju Institute of Science and Technology · +3 more institutions
Abstract
Nanoscale zero-valent iron (NZVI) was synthesized and tested for the removal of As(III), which is a highly toxic, mobile, and predominant arsenic species in anoxic groundwater. We used SEM-EDX, AFM, and XRD to characterize particle size, surface morphology, and corrosion layers formed on pristine NZVI and As(III)-treated NZVI. AFM results showed that particle size ranged from 1 to 120 nm. XRD and SEM results revealed that NZVI gradually converted to magnetite/maghemite corrosion products mixed with lepidocrocite over 60 d. Arsenic(III) adsorption kinetics were rapid and occurred on a scale of minutes following a pseudo-first-order rate expression with observed reaction rate constants (K(obs)) of 0.07-1.3…
Citation impact
- FWCI
- 26.52
- Percentile
- 100%
- References
- 46
Authors
4- SRSushil R. KanelCorresponding
Université Grenoble Alpes, Gwangju Institute of Science and Technology, San Francisco State University, University of California, San Francisco, Centre National de la Recherche Scientifique
- BABruce A. Manning
University of California, San Francisco, Centre National de la Recherche Scientifique, Université Grenoble Alpes, San Francisco State University, Gwangju Institute of Science and Technology
- LCLaurent Charlet
Gwangju Institute of Science and Technology, San Francisco State University, Université Grenoble Alpes, Centre National de la Recherche Scientifique
- HCHeechul Choi
Université Grenoble Alpes, University of California, San Francisco, Gwangju Institute of Science and Technology, Centre National de la Recherche Scientifique, San Francisco State University
Topics & keywords
- Zerovalent iron
- Adsorption
- Arsenic
- Lepidocrocite
- Maghemite
- Magnetite
- Chemistry
- Particle size
- Clean water and sanitation