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

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F17%3A73583392" target="_blank" >RIV/61989592:15310/17:73583392 - isvavai.cz</a>

Result on the web

<a href="http://pubs.acs.org/doi/pdf/10.1021/acs.est.7b04177" target="_blank" >http://pubs.acs.org/doi/pdf/10.1021/acs.est.7b04177</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acs.est.7b04177" target="_blank" >10.1021/acs.est.7b04177</a>

Result language

angličtina

Original language name

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

Original language description

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., &quot;sulfidated&quot;). 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.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10511 - Environmental sciences (social aspects to be 5.7)

Project

<a href="/en/project/GF17-33779L" target="_blank" >GF17-33779L: Reaction mechanisms of CHCs and Cr(VI) with nZVI particles</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Environmental Science &amp; Technology

ISSN

0013-936X

e-ISSN

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Volume of the periodical

51

Issue of the periodical within the volume

22

Country of publishing house

US - UNITED STATES

Number of pages

16

Pages from-to

13070-13085

UT code for WoS article

000416496700002

EID of the result in the Scopus database

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