Mg-aminoclay as stabilizer for synthesizing highly stable and reactive nZVI for decontamination

Yuhoon Hwang; Young-Chul Lee; Paul D. Mines; Y. S. Huh; Henrik Rasmus Andersen

Mg-aminoclay as stabilizer for synthesizing highly stable and reactive nZVI for decontamination

Yuhoon Hwang, Young-Chul Lee, Paul D. Mines, Y. S. Huh, Henrik Rasmus Andersen

Inha University

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Abstract

Despite the large surface area and superior reactivity of nZVI, its limited stability is a major obstacle for in situ subsurface remediation. In this study, Mg-aminoclay (MgAC) was applied for the first time as a stabilizer in nZVI synthesis. With increased doses of Mg-aminoclay, nZVI particle growth was inhibited and thin sheathed grape-like nZVI particles with higher crystallinity were produced. The coated nZVI were smaller and non-aggregating, and it can reduced nitrate 350-fold faster than uncoated. The higher stability of MgAC coated nZVI was achieved by electrostatic repulsion from the positively charged MgAC coating. Moreover, the proper washing strategy is essential to keep stability and reactivity during preparation and transport.

Original language	English
Publication date	2014
Number of pages	3
Publication status	Published - 2014
Event	2014 IWA World Water Congress & Exhibition - Lisbon, Portugal Duration: 21 Sept 2014 → 26 Sept 2014

Conference

Conference	2014 IWA World Water Congress & Exhibition
Country/Territory	Portugal
City	Lisbon
Period	21/09/2014 → 26/09/2014

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title = "Mg-aminoclay as stabilizer for synthesizing highly stable and reactive nZVI for decontamination",

abstract = "Despite the large surface area and superior reactivity of nZVI, its limited stability is a major obstacle for in situ subsurface remediation. In this study, Mg-aminoclay (MgAC) was applied for the first time as a stabilizer in nZVI synthesis. With increased doses of Mg-aminoclay, nZVI particle growth was inhibited and thin sheathed grape-like nZVI particles with higher crystallinity were produced. The coated nZVI were smaller and non-aggregating, and it can reduced nitrate 350-fold faster than uncoated. The higher stability of MgAC coated nZVI was achieved by electrostatic repulsion from the positively charged MgAC coating. Moreover, the proper washing strategy is essential to keep stability and reactivity during preparation and transport.",

author = "Yuhoon Hwang and Young-Chul Lee and Mines, {Paul D.} and Huh, {Y. S.} and Andersen, {Henrik Rasmus}",

year = "2014",

language = "English",

note = "2014 IWA World Water Congress & Exhibition ; Conference date: 21-09-2014 Through 26-09-2014",

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TY - ABST

T1 - Mg-aminoclay as stabilizer for synthesizing highly stable and reactive nZVI for decontamination

AU - Hwang, Yuhoon

AU - Lee, Young-Chul

AU - Mines, Paul D.

AU - Huh, Y. S.

AU - Andersen, Henrik Rasmus

PY - 2014

Y1 - 2014

N2 - Despite the large surface area and superior reactivity of nZVI, its limited stability is a major obstacle for in situ subsurface remediation. In this study, Mg-aminoclay (MgAC) was applied for the first time as a stabilizer in nZVI synthesis. With increased doses of Mg-aminoclay, nZVI particle growth was inhibited and thin sheathed grape-like nZVI particles with higher crystallinity were produced. The coated nZVI were smaller and non-aggregating, and it can reduced nitrate 350-fold faster than uncoated. The higher stability of MgAC coated nZVI was achieved by electrostatic repulsion from the positively charged MgAC coating. Moreover, the proper washing strategy is essential to keep stability and reactivity during preparation and transport.

AB - Despite the large surface area and superior reactivity of nZVI, its limited stability is a major obstacle for in situ subsurface remediation. In this study, Mg-aminoclay (MgAC) was applied for the first time as a stabilizer in nZVI synthesis. With increased doses of Mg-aminoclay, nZVI particle growth was inhibited and thin sheathed grape-like nZVI particles with higher crystallinity were produced. The coated nZVI were smaller and non-aggregating, and it can reduced nitrate 350-fold faster than uncoated. The higher stability of MgAC coated nZVI was achieved by electrostatic repulsion from the positively charged MgAC coating. Moreover, the proper washing strategy is essential to keep stability and reactivity during preparation and transport.

M3 - Conference abstract for conference

T2 - 2014 IWA World Water Congress & Exhibition

Y2 - 21 September 2014 through 26 September 2014

ER -

Mg-aminoclay as stabilizer for synthesizing highly stable and reactive nZVI for decontamination

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