Naslov
Reactivity of rimsulfuron in newly formed inclusion combinations by using cyclodextrin and zeolite

Autori
Liguori, Angelica ; D'auria, Maurizio ; Emanuele, Lucia ; Scrano, Laura ; Lelario, Filomena ; Bufo, Sabino Aurelio

Izvornik
International journal of environmental analytical chemistry (0306-7319) 87 (2007), 13-14; 1043-1052

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
rimsulfuron; zeolite nay; beta-cyclodextrin; inclusion compound; chemical degradation; photodegradation

Sažetak
Extending our investigations on environment protection by agrochemicals diffusion and accumulation, newly formed inclusion combinations of rimsulfuron into zeolite-NaY (Z-NaY) and beta-cyclodextrin (beta-CD) were studied and compared. The reactivity of the included herbicide under UV-irradiation and in the dark was assessed. Many guest/ host ratios were tested: the best results were found using 3 g (6.953 mmol) of rimsulfuron per kilogram of zeolite, with 80% inclusion success (5.562 mmol kg-(1)), and a 1: 2 molar ratio, 190 g of rimsulfuron per kilogram of beta-CD with 58% inclusion success. The herbicide Z-NaY-combined underwent rapid and effective (halflive 2-7 h) degradation either catalytically or photochemically, giving rise to different identified by-products. On the contrary, beta-CD was able to protect rimsulfuron totally both in the dark and under 24-h direct UV irradiation. On the basis of the obtained results, a different utilization of the two inclusion materials has been suggested.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA