Optimization of Synthesis Condition for Nanoscale Zero Valent Iron Immobilization on Granular Activated Carbon

Translated title of the contribution: Optimization of Synthesis Condition for Nanoscale Zero Valent Iron Immobilization on Granular Activated Carbon

Research output: Contribution to journalJournal articleResearchpeer-review

283 Downloads (Pure)

Abstract

Nanoscale zero valent iron (nZVI) has been intensively studied for the treatment of a plethora of pollutants through reductive reaction, however, the nano size should be of concern when nZVI is considered for water treatment, due to difficulties in recovery. The loss of nZVI causes not only economical loss, but also potential risk to human health and environment. Thus, the immobilization onto coarse or structured support is essential. In this study, two representative processes for nZVI immobilization on granular activated carbon (GAC) were evaluated, and optimized conditions for synthesizing Fe/GAC composite were suggested. Both total iron content and Fe0 content can be significantly affected by preparation processes, therefore, it was important to avoid oxidation during preparation to achieve higher reduction capacity. Synthesis conditions such as reduction time and existence of intermediate drying step were investigated to improve Fe0 content of Fe/GAC composites. The optimal condition was two hours of NaBH4 reduction without intermediate drying process. The prepared Fe/GAC composite showed synergistic effect of the adsorption capability of the GAC and the degradation capability of the nZVI, which make this composite a very effective material for environmental remediation.
Original languageMultiple languages
JournalJournal of Korean Society of Environmental Engineers
Volume38
Issue number9
Pages (from-to)521-527
ISSN1225-5025
DOIs
Publication statusPublished - 2016

Keywords

  • Granular activated carbon
  • Nanoscale zero valent iron
  • Oxidation-reduction
  • Impregnation

Cite this

@article{71d161fdbd144d3e9224c74c19c6b4b8,
title = "Optimization of Synthesis Condition for Nanoscale Zero Valent Iron Immobilization on Granular Activated Carbon",
abstract = "Nanoscale zero valent iron (nZVI) has been intensively studied for the treatment of a plethora of pollutants through reductive reaction, however, the nano size should be of concern when nZVI is considered for water treatment, due to difficulties in recovery. The loss of nZVI causes not only economical loss, but also potential risk to human health and environment. Thus, the immobilization onto coarse or structured support is essential. In this study, two representative processes for nZVI immobilization on granular activated carbon (GAC) were evaluated, and optimized conditions for synthesizing Fe/GAC composite were suggested. Both total iron content and Fe0 content can be significantly affected by preparation processes, therefore, it was important to avoid oxidation during preparation to achieve higher reduction capacity. Synthesis conditions such as reduction time and existence of intermediate drying step were investigated to improve Fe0 content of Fe/GAC composites. The optimal condition was two hours of NaBH4 reduction without intermediate drying process. The prepared Fe/GAC composite showed synergistic effect of the adsorption capability of the GAC and the degradation capability of the nZVI, which make this composite a very effective material for environmental remediation.",
keywords = "Granular activated carbon, Nanoscale zero valent iron, Oxidation-reduction, Impregnation",
author = "Mines, {Paul D.} and Andersen, {Henrik Rasmus} and Yuhoon Hwang and Mines, {Paul D.} and Wontae Lee",
year = "2016",
doi = "10.4491/KSEE.2016.38.9.521",
language = "Flere sprog",
volume = "38",
pages = "521--527",
journal = "Journal of Korean Society of Environmental Engineers",
issn = "1225-5025",
number = "9",

}

Optimization of Synthesis Condition for Nanoscale Zero Valent Iron Immobilization on Granular Activated Carbon. / Mines, Paul D.; Andersen, Henrik Rasmus; Hwang, Yuhoon; Mines, Paul D.; Lee, Wontae.

In: Journal of Korean Society of Environmental Engineers, Vol. 38, No. 9, 2016, p. 521-527.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Optimization of Synthesis Condition for Nanoscale Zero Valent Iron Immobilization on Granular Activated Carbon

AU - Mines, Paul D.

AU - Andersen, Henrik Rasmus

AU - Hwang, Yuhoon

AU - Mines, Paul D.

AU - Lee, Wontae

PY - 2016

Y1 - 2016

N2 - Nanoscale zero valent iron (nZVI) has been intensively studied for the treatment of a plethora of pollutants through reductive reaction, however, the nano size should be of concern when nZVI is considered for water treatment, due to difficulties in recovery. The loss of nZVI causes not only economical loss, but also potential risk to human health and environment. Thus, the immobilization onto coarse or structured support is essential. In this study, two representative processes for nZVI immobilization on granular activated carbon (GAC) were evaluated, and optimized conditions for synthesizing Fe/GAC composite were suggested. Both total iron content and Fe0 content can be significantly affected by preparation processes, therefore, it was important to avoid oxidation during preparation to achieve higher reduction capacity. Synthesis conditions such as reduction time and existence of intermediate drying step were investigated to improve Fe0 content of Fe/GAC composites. The optimal condition was two hours of NaBH4 reduction without intermediate drying process. The prepared Fe/GAC composite showed synergistic effect of the adsorption capability of the GAC and the degradation capability of the nZVI, which make this composite a very effective material for environmental remediation.

AB - Nanoscale zero valent iron (nZVI) has been intensively studied for the treatment of a plethora of pollutants through reductive reaction, however, the nano size should be of concern when nZVI is considered for water treatment, due to difficulties in recovery. The loss of nZVI causes not only economical loss, but also potential risk to human health and environment. Thus, the immobilization onto coarse or structured support is essential. In this study, two representative processes for nZVI immobilization on granular activated carbon (GAC) were evaluated, and optimized conditions for synthesizing Fe/GAC composite were suggested. Both total iron content and Fe0 content can be significantly affected by preparation processes, therefore, it was important to avoid oxidation during preparation to achieve higher reduction capacity. Synthesis conditions such as reduction time and existence of intermediate drying step were investigated to improve Fe0 content of Fe/GAC composites. The optimal condition was two hours of NaBH4 reduction without intermediate drying process. The prepared Fe/GAC composite showed synergistic effect of the adsorption capability of the GAC and the degradation capability of the nZVI, which make this composite a very effective material for environmental remediation.

KW - Granular activated carbon

KW - Nanoscale zero valent iron

KW - Oxidation-reduction

KW - Impregnation

U2 - 10.4491/KSEE.2016.38.9.521

DO - 10.4491/KSEE.2016.38.9.521

M3 - Tidsskriftartikel

VL - 38

SP - 521

EP - 527

JO - Journal of Korean Society of Environmental Engineers

JF - Journal of Korean Society of Environmental Engineers

SN - 1225-5025

IS - 9

ER -