Sulfidation of Iron-Based Materials: A Review of Processes and Implications for Water Treatment and Remediation

Dimin Fan, Ying Lan, Paul Tratnyek, Richard Johnson, Jan Filip, Denis M. O'Carroll, Ariel Nunez Garcia, Abinash Agrawal

Research output: Contribution to journalReview article

57 Citations (Scopus)

Abstract

Iron-based materials used in water treatment and groundwater remediation - especially micro- and nanosized zerovalent iron (nZVI) - can be more effective when modified with lower-valent forms of sulfur (i.e., "sulfidated"). Controlled sulfidation for this purpose (using sulfide, dithionite, etc.) is the main topic of this review, but insights are derived by comparison with related and comparatively well-characterized processes such as corrosion of iron in sulfidic waters and abiotic natural attenuation by iron sulfide minerals. Material characterization shows that varying sulfidation protocols (e.g., concerted or sequential) and key operational variables (e.g., S/Fe ratio and sulfidation duration) result in materials with structures and morphologies ranging from core-shell to multiphase. A meta-analysis of available kinetic data for dechlorination under anoxic conditions, shows that sulfidation usually increases dechlorination rates, and simultaneously hydrogen production is suppressed. Therefore, sulfidation can greatly improve the efficiency of utilization of reducing equivalents for contaminant removal. This benefit is most likely due to inhibited corrosion as a result of sulfidation. Sulfidation may also favor desirable pathways of contaminant removal, such as (i) dechlorination by reductive elimination rather than hydrogenolysis and (ii) sequestration of metals as sulfides that could be resistant to reoxidation. Under oxic conditions, sulfidation is shown to enhance heterogeneous catalytic oxidation of contaminants. These net effects of sulfidation on contaminant removal by iron-based materials may substantially improve their practical utility for water treatment and remediation of contaminated groundwater.

Original languageEnglish (US)
Pages (from-to)13070-13085
Number of pages16
JournalEnvironmental Science and Technology
Volume51
Issue number22
DOIs
StatePublished - Nov 21 2017

Fingerprint

Remediation
Water treatment
water treatment
dechlorination
remediation
Iron
Dechlorination
iron
pollutant
Impurities
corrosion
Sulfides
sulfide
Groundwater
groundwater
natural attenuation
iron sulfide
Natural attenuation
Corrosion
meta-analysis

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry

Cite this

Sulfidation of Iron-Based Materials : A Review of Processes and Implications for Water Treatment and Remediation. / Fan, Dimin; Lan, Ying; Tratnyek, Paul; Johnson, Richard; Filip, Jan; O'Carroll, Denis M.; Nunez Garcia, Ariel; Agrawal, Abinash.

In: Environmental Science and Technology, Vol. 51, No. 22, 21.11.2017, p. 13070-13085.

Research output: Contribution to journalReview article

Fan, Dimin ; Lan, Ying ; Tratnyek, Paul ; Johnson, Richard ; Filip, Jan ; O'Carroll, Denis M. ; Nunez Garcia, Ariel ; Agrawal, Abinash. / Sulfidation of Iron-Based Materials : A Review of Processes and Implications for Water Treatment and Remediation. In: Environmental Science and Technology. 2017 ; Vol. 51, No. 22. pp. 13070-13085.
@article{8c6276a7cbab4668aa479e2bd4c94156,
title = "Sulfidation of Iron-Based Materials: A Review of Processes and Implications for Water Treatment and Remediation",
abstract = "Iron-based materials used in water treatment and groundwater remediation - especially micro- and nanosized zerovalent iron (nZVI) - can be more effective when modified with lower-valent forms of sulfur (i.e., {"}sulfidated{"}). Controlled sulfidation for this purpose (using sulfide, dithionite, etc.) is the main topic of this review, but insights are derived by comparison with related and comparatively well-characterized processes such as corrosion of iron in sulfidic waters and abiotic natural attenuation by iron sulfide minerals. Material characterization shows that varying sulfidation protocols (e.g., concerted or sequential) and key operational variables (e.g., S/Fe ratio and sulfidation duration) result in materials with structures and morphologies ranging from core-shell to multiphase. A meta-analysis of available kinetic data for dechlorination under anoxic conditions, shows that sulfidation usually increases dechlorination rates, and simultaneously hydrogen production is suppressed. Therefore, sulfidation can greatly improve the efficiency of utilization of reducing equivalents for contaminant removal. This benefit is most likely due to inhibited corrosion as a result of sulfidation. Sulfidation may also favor desirable pathways of contaminant removal, such as (i) dechlorination by reductive elimination rather than hydrogenolysis and (ii) sequestration of metals as sulfides that could be resistant to reoxidation. Under oxic conditions, sulfidation is shown to enhance heterogeneous catalytic oxidation of contaminants. These net effects of sulfidation on contaminant removal by iron-based materials may substantially improve their practical utility for water treatment and remediation of contaminated groundwater.",
author = "Dimin Fan and Ying Lan and Paul Tratnyek and Richard Johnson and Jan Filip and O'Carroll, {Denis M.} and {Nunez Garcia}, Ariel and Abinash Agrawal",
year = "2017",
month = "11",
day = "21",
doi = "10.1021/acs.est.7b04177",
language = "English (US)",
volume = "51",
pages = "13070--13085",
journal = "Environmental Science & Technology",
issn = "0013-936X",
publisher = "American Chemical Society",
number = "22",

}

TY - JOUR

T1 - Sulfidation of Iron-Based Materials

T2 - A Review of Processes and Implications for Water Treatment and Remediation

AU - Fan, Dimin

AU - Lan, Ying

AU - Tratnyek, Paul

AU - Johnson, Richard

AU - Filip, Jan

AU - O'Carroll, Denis M.

AU - Nunez Garcia, Ariel

AU - Agrawal, Abinash

PY - 2017/11/21

Y1 - 2017/11/21

N2 - Iron-based materials used in water treatment and groundwater remediation - especially micro- and nanosized zerovalent iron (nZVI) - can be more effective when modified with lower-valent forms of sulfur (i.e., "sulfidated"). Controlled sulfidation for this purpose (using sulfide, dithionite, etc.) is the main topic of this review, but insights are derived by comparison with related and comparatively well-characterized processes such as corrosion of iron in sulfidic waters and abiotic natural attenuation by iron sulfide minerals. Material characterization shows that varying sulfidation protocols (e.g., concerted or sequential) and key operational variables (e.g., S/Fe ratio and sulfidation duration) result in materials with structures and morphologies ranging from core-shell to multiphase. A meta-analysis of available kinetic data for dechlorination under anoxic conditions, shows that sulfidation usually increases dechlorination rates, and simultaneously hydrogen production is suppressed. Therefore, sulfidation can greatly improve the efficiency of utilization of reducing equivalents for contaminant removal. This benefit is most likely due to inhibited corrosion as a result of sulfidation. Sulfidation may also favor desirable pathways of contaminant removal, such as (i) dechlorination by reductive elimination rather than hydrogenolysis and (ii) sequestration of metals as sulfides that could be resistant to reoxidation. Under oxic conditions, sulfidation is shown to enhance heterogeneous catalytic oxidation of contaminants. These net effects of sulfidation on contaminant removal by iron-based materials may substantially improve their practical utility for water treatment and remediation of contaminated groundwater.

AB - Iron-based materials used in water treatment and groundwater remediation - especially micro- and nanosized zerovalent iron (nZVI) - can be more effective when modified with lower-valent forms of sulfur (i.e., "sulfidated"). Controlled sulfidation for this purpose (using sulfide, dithionite, etc.) is the main topic of this review, but insights are derived by comparison with related and comparatively well-characterized processes such as corrosion of iron in sulfidic waters and abiotic natural attenuation by iron sulfide minerals. Material characterization shows that varying sulfidation protocols (e.g., concerted or sequential) and key operational variables (e.g., S/Fe ratio and sulfidation duration) result in materials with structures and morphologies ranging from core-shell to multiphase. A meta-analysis of available kinetic data for dechlorination under anoxic conditions, shows that sulfidation usually increases dechlorination rates, and simultaneously hydrogen production is suppressed. Therefore, sulfidation can greatly improve the efficiency of utilization of reducing equivalents for contaminant removal. This benefit is most likely due to inhibited corrosion as a result of sulfidation. Sulfidation may also favor desirable pathways of contaminant removal, such as (i) dechlorination by reductive elimination rather than hydrogenolysis and (ii) sequestration of metals as sulfides that could be resistant to reoxidation. Under oxic conditions, sulfidation is shown to enhance heterogeneous catalytic oxidation of contaminants. These net effects of sulfidation on contaminant removal by iron-based materials may substantially improve their practical utility for water treatment and remediation of contaminated groundwater.

UR - http://www.scopus.com/inward/record.url?scp=85035342052&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85035342052&partnerID=8YFLogxK

U2 - 10.1021/acs.est.7b04177

DO - 10.1021/acs.est.7b04177

M3 - Review article

C2 - 29035566

AN - SCOPUS:85035342052

VL - 51

SP - 13070

EP - 13085

JO - Environmental Science & Technology

JF - Environmental Science & Technology

SN - 0013-936X

IS - 22

ER -