Zero-Valent Iron Nanoparticles Reduce Arsenites and Arsenates to As(0) Firmly Embedded in Core–Shell Superstructure: Challenging Strategy of Arsenic Treatment under Anoxic Conditions

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F17%3A73582702" target="_blank" >RIV/61989592:15310/17:73582702 - isvavai.cz</a>

Result on the web

<a href="http://pubs.acs.org/doi/10.1021/acssuschemeng.6b02698" target="_blank" >http://pubs.acs.org/doi/10.1021/acssuschemeng.6b02698</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acssuschemeng.6b02698" target="_blank" >10.1021/acssuschemeng.6b02698</a>

Result language

angličtina

Original language name

Zero-Valent Iron Nanoparticles Reduce Arsenites and Arsenates to As(0) Firmly Embedded in Core–Shell Superstructure: Challenging Strategy of Arsenic Treatment under Anoxic Conditions

Original language description

Arsenites and arsenates are carcinogenic to humans and are typically removed from contaminated water using various sorbents. However, these treatment methods result in the secondary release of weakly bound As species and require large amounts of sorbents. Here, we introduce a groundbreaking method involving the use of oxidic-shell-free nanoscale zero-valent iron (OSF-nZVI) to treat arsenite/arsenate-polluted underground water. Under anoxic conditions, OSF-nZVI is capable to reduce As(III)/As(V) species to As(0) (up to 65% of total arsenic content). Thus, reduction synergistically contributes to sorption tuning suitably the chemical nature and isoelectric points of As species, thereby enhancing arsenic removal from an anoxic aqueous environment. More importantly, As species are locked between the Fe(0) core and iron(III) oxide outer shell. For comparison, the removal capability of OSF-nZVI is 2 times lower under oxic conditions, due to the complex redox mechanism resulting in exclusive sorption of As(III)/As(V) species onto the surface of oxidized OSF-nZVI particles. The unique strategy to treat arsenites/arsenates by their reduction to zero-valent arsenic with OSF-nZVI was also demonstrated in experiments with real polluted water. Results suggest that &quot;green&quot; reduction and firm immobilization of toxic As species through OSF-nZVI could provide environmentally friendly tool to treat arsenic-polluted underground water, a main source of highly contaminated drinking water worldwide.

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

10402 - Inorganic and nuclear chemistry

Project

Result was created during the realization of more than one project. More information in the Projects tab.

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

ACS Sustainable Chemistry &amp; Engineering

ISSN

2168-0485

e-ISSN

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Volume of the periodical

5

Issue of the periodical within the volume

4

Country of publishing house

US - UNITED STATES

Number of pages

12

Pages from-to

3027-3038

UT code for WoS article

000398429700027

EID of the result in the Scopus database

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