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

الملخص

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.