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Kinetics Study and controlled release of Synthesized Phenoxy herbicides-Based Nanocomposites from; 2, 4 -dichloro- and 2, 4, 5-trichlorophenoxy acetates with Zn/Al Layered double hydroxide interlamellae | ||
| Iraqi National Journal Of Chemistry | ||
| Article 1, Volume 0, Issue 38, 2014, Pages 279-292 | ||
| Authors | ||
| Abbas M. Bashi; S.M. Haddawi; Ahmed H. Al-Yasari | ||
| Abstract | ||
| Abstract The synthesis of phenolxy herbicides- Zn/Al-layered double hydroxides nanohybrids by reacting 2, 4-di chloro- (24D) and 2, 4, 5-trichlorophenoxy acetic acid (TCPA) nanocomposites were accomplished using direct method of ion exchange. The release of nanohybrids into various aqueous salutions; carbonate and phosphate was found to be controlled by parabolic diffusion at the beginning of the process. On the other hand, the whole process is governed by pseudo-second order rate expression. The percentage saturated released was found to be anionic-dependent, in the order of carbonate > phosphate for the release media and 24D >TCPA for the anionic guest. This study suggests that the release of the phenoxyherbicides agrochemicals from the nanohybrid compounds can be tuned by choosing the right combination exchangeable anions both in the incoming and the out coming anions. | ||
| Keywords | ||
| Phenoxyherbicides; dichlorophenoxy acetate; trichlorophenoxy acetate; layered double hydroxide; hydrotalcite; nanohybrids | ||
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