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Slow diuron release formulations based on clay-phosphatidylcholine complexes

SYSNO ASEP	0481483
Druh ASEP	J - Článek v odborném periodiku
Zařazení RIV	J - Článek v odborném periodiku
Poddruh J	Článek ve WOS
Název	Slow diuron release formulations based on clay-phosphatidylcholine complexes
Tvůrce(i)	Undabeytia, T. (ES) Recio, E. (ES) Maqueda, C. (ES) Sanchez-Verdejo, T. (ES) Balek, Vladimír (UACH-T)
Zdroj.dok.	Applied Clay Science. - : Elsevier - ISSN 0169-1317 Roč. 55, JAN (2012), s. 53-61
Poč.str.	9 s.
Jazyk dok.	eng - angličtina
Země vyd.	NL - Nizozemsko
Klíč. slova	Diuron ; Phosphatidylcholine ; Clay mineral ; Leaching ; Bioactivity ; Slow release
Vědní obor RIV	CA - Anorganická chemie
Obor OECD	Inorganic and nuclear chemistry
CEP	LC523 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy
Institucionální podpora	UACH-T - RVO:61388980
UT WOS	000299984300007
EID SCOPUS	84855420977
DOI	10.1016/j.clay.2011.10.005
Anotace	Slow release formulations of the herbicide diuron were designed to reduce the risk of water pollution resulting from conventional formulations. The new formulations were based on herbicide incorporation in phosphatidylcholine (PC) vesicles that were sorbed on the clay mineral montmorillonite. The active ingredient contents of the formulations reached up to 28% w:w. Thermal analysis revealed that the closely packed arrangement of PC on the clay enhanced diuron sorption by disrupting the interactions among PC molecules. Adsorption experiments using diuron were performed in soils with different physico-chemical properties to evaluate the relationship between the sorption and the mobility of the herbicide. In soil column experiments with sandy soil, the herbicide in PC-clay-based formulations mainly accumulated in the top soil, and there was a one-third reduction in leaching compared to the commercial formulation. The differences in leaching (compared to the commercial formulation) were lower when using loam soil due to its higher sorption of the herbicide and hysteresis effects. In the sandy soil, bioassay experiments showed a higher herbicidal activity in the top-soil layer for the PC-clay formulations than for the commercial formulation. Therefore, PC-clay formulations of this herbicide can be used at lower doses than recommended, thereby reducing the environmental risks associated with the application of diuron formulations.
Pracoviště	Ústav anorganické chemie
Kontakt	Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931
Rok sběru	2018

Počet záznamů: 1