Environmental fate of sulfidated nZVI particles: the interplay of nanoparticle corrosion and toxicity during aging

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388971%3A_____%2F20%3A00534781" target="_blank" >RIV/61388971:_____/20:00534781 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989592:15310/20:73603842 RIV/46747885:24620/20:00007772 RIV/00216208:11310/20:10414064

Výsledek na webu

<a href="https://pubs.rsc.org/en/content/articlelanding/2020/EN/D0EN00075B#!divAbstract" target="_blank" >https://pubs.rsc.org/en/content/articlelanding/2020/EN/D0EN00075B#!divAbstract</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/d0en00075b" target="_blank" >10.1039/d0en00075b</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Environmental fate of sulfidated nZVI particles: the interplay of nanoparticle corrosion and toxicity during aging

Popis výsledku v původním jazyce

Nanomaterials have attracted research attention due to their unique properties, which have also made them increasingly useful for various applications, including remediation technologies. In this work, we tried to explore the aging phenomenon of several newly developed nanoscale zero-valent iron (nZVI) particles containing 0.25, 1, and 5% sulfur and to monitor the possible toxicity changes related to the nZVI particles before and during the aging period. We used several relevant techniques for monitoring nZVI aging, including transmission electron microscopy, X-ray powder diffraction, and particle size analysis. The toxicity of the nZVI particles was monitored using a new oxidative stress assay based on lipid peroxidation, a simple bacterial cultivation test. A test using activated sludge respiration and phospholipid fatty acid analysis of microbial populations was also employed. The results of the material analyses showed that the sulfidated nZVI particles were more stable than bare nZVI particles in terms of Fe(0)content and particle diameter. The stability was more pronounced with the increasing content of sulfur in the nanoparticles, the content of alpha-Fe was only 35.3% in the nZVI particles compared with 78.6% in the 5% sulfur-doped nanoparticles after 60 days of aging. The results of the oxidative stress assay revealed that the toxicity was also lower with increasing sulfur content, nevertheless, the oxidative stress marker increased substantially after 7 days of aging, reaching a similar level to that caused by bare nZVI in some cases. Other results showed that even incubation in media used for the respective tests caused extensive aging, therefore, this information must be considered before the selection of toxicity assays for nanomaterial evaluation.

Název v anglickém jazyce

Environmental fate of sulfidated nZVI particles: the interplay of nanoparticle corrosion and toxicity during aging

Popis výsledku anglicky

Nanomaterials have attracted research attention due to their unique properties, which have also made them increasingly useful for various applications, including remediation technologies. In this work, we tried to explore the aging phenomenon of several newly developed nanoscale zero-valent iron (nZVI) particles containing 0.25, 1, and 5% sulfur and to monitor the possible toxicity changes related to the nZVI particles before and during the aging period. We used several relevant techniques for monitoring nZVI aging, including transmission electron microscopy, X-ray powder diffraction, and particle size analysis. The toxicity of the nZVI particles was monitored using a new oxidative stress assay based on lipid peroxidation, a simple bacterial cultivation test. A test using activated sludge respiration and phospholipid fatty acid analysis of microbial populations was also employed. The results of the material analyses showed that the sulfidated nZVI particles were more stable than bare nZVI particles in terms of Fe(0)content and particle diameter. The stability was more pronounced with the increasing content of sulfur in the nanoparticles, the content of alpha-Fe was only 35.3% in the nZVI particles compared with 78.6% in the 5% sulfur-doped nanoparticles after 60 days of aging. The results of the oxidative stress assay revealed that the toxicity was also lower with increasing sulfur content, nevertheless, the oxidative stress marker increased substantially after 7 days of aging, reaching a similar level to that caused by bare nZVI in some cases. Other results showed that even incubation in media used for the respective tests caused extensive aging, therefore, this information must be considered before the selection of toxicity assays for nanomaterial evaluation.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10511 - Environmental sciences (social aspects to be 5.7)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Environmental Science-Nano

ISSN

2051-8153

e-ISSN

—

Svazek periodika

7

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

13

Strana od-do

1794-1806

Kód UT WoS článku

000545480500015

EID výsledku v databázi Scopus

2-s2.0-85087938848