Enhancement of Nanoscale Zero-Valent Iron Stability in Aqueous Solution Via Metal Hydroxide Coating

Ibrahim Maamoun, Osama Eljamal, Nobuhiro Matsunaga

Research output: Contribution to journalArticle

Abstract

Concerns have been increased regarding the behavior of nanoscale zero-valent iron (nZVI) in subsurface environmental remediation applications. In this study, the iron particles were coated by magnesium hydroxide (Mg(OH)_2) shell in order to improve their suspension stability in aqueous solutions. Sedimentation tests were conducted for different ratios of the coating material to evaluate the enhancement of particles stability and to determine the optimum coating ratio. Results of sedimentation tests showed that, the coated iron particles Mg(OH)_2-CnZVI exhibited better stability performance than that of bare nZVI (BnZVI). Additionally, optical absorbance results depicted that Mg/Fe coating ratios of 0.8 and 1 showed less aggregation potential than that of the other coating ratios and BnZVI as well. Moreover, beside the enhanced stability, the addition of the nonmagnetic coating layer protected the nZVI core from the rapid corrosion. Further studies should be conducted to investigate the sustainability of the coated nZVI reactivity.
Original languageEnglish
Pages (from-to)82-83
Number of pages2
JournalProceedings of International Exchange and Innovation Conference on Engineering & Sciences (IEICES)
Issue number4
DOIs
Publication statusPublished - Oct 18 2018

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