Investigations into titanium dioxide nanoparticle and pesticide interactions in aqueous environments
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F17%3A00100151" target="_blank" >RIV/00216224:14310/17:00100151 - isvavai.cz</a>
Result on the web
<a href="http://pubs.rsc.org/en/Content/ArticleLanding/2017/EN/C7EN00445A#!divAbstract" target="_blank" >http://pubs.rsc.org/en/Content/ArticleLanding/2017/EN/C7EN00445A#!divAbstract</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/c7en00445a" target="_blank" >10.1039/c7en00445a</a>
Alternative languages
Result language
angličtina
Original language name
Investigations into titanium dioxide nanoparticle and pesticide interactions in aqueous environments
Original language description
The influence of three pesticides (glyphosate, aminomethylphosphonic acid (AMPA) and 2,4-dichlorophenoxyacetic acid (2,4-D)) on the colloidal fate of TiO2 nanoparticles (NPs; anatase and rutile) has been investigated under aqueous conditions of variable chemical composition (Na+ or Ca2+), ionic strength (IS, 10(-4) -10(-1) M), and pH (5 or 8). Sorption and degradation of these pesticides in the presence of the NPs were evaluated. In the absence of the pesticides, increasing IS, the presence of the divalent cation Ca2+ and a pH value close to the NP isoelectric point favored NP homoaggregation as expected. However, at low IS (<= 10(-2) M in NaCl; <= 10(-3) M in CaCl2), in the presence of a few mu g L-1 of glyphosate and rutile in the mg L-1 range, NP homoaggregation was prevented, despite the pH = 5 close to the NP isoelectric point (4.0-4.2). The phosphonate group of the pesticide drove glyphosate adsorption onto the NP, while the carboxylic group was responsible for the electrostatic stabilization of the NP. The stabilizing effect of glyphosate on NP aggregation however appears to be temporary. Furthermore, TiO2 NPs also adsorbed AMPA and promoted degradation of glyphosate to AMPA. These results highlight new evidence of NP-pesticide interactions and the differences in their fate and potential co-migration behavior in aquatic environments.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - 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)
Result continuities
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)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
ENVIRONMENTAL SCIENCE-NANO
ISSN
2051-8153
e-ISSN
2051-8161
Volume of the periodical
4
Issue of the periodical within the volume
10
Country of publishing house
GB - UNITED KINGDOM
Number of pages
11
Pages from-to
2055-2065
UT code for WoS article
000412904200013
EID of the result in the Scopus database
2-s2.0-85031736495