Layered Double Hydroxide as a Potential Matrix for Controlled Release Formulation of Phenoxyherbicides

  • Norhayati Hashim
  • Mohd Zobir Hussein
  • Illyas Md Isa
  • Azlan Kamari
  • Azmi Mohamed
  • Mohamad Saufi Rosmi
  • Adila Mohamad Jaafar
Keywords: intercalation, nanohybrids, phenoxyherbicides, control release, kinetic study

Abstract

Phenoxyherbicides, namely 4-(2,4-dichlorophenoxy)butyrate (DPBA), 2-(2,4-dichlorophenoxy) propionate (DPPA) and 2(3-chlorophenoxy)propionate (CPPA) were intercalated separately into the interlamellae of Zn/Al layered double hydroxides (LDHs) by direct co-precipitation method for the formation of their nanohybrids, DPBA-LDH, DPPA-LDH and CPPA-LDH, respectively. Powder x-ray diffraction patterns of the sample show that the interlayer spacing expended from 8.9 Å in LDH to 28.14, 21.44 and 20.05 Å for DPBA-LDH, DPPA-LDH and CPPA-LDH nanocomposite, respectively. Release study of the phenoxyherbicides, DPBA, DPPA and CPPA anion from their respective nanohybrids were carried out at different concentrations of sodium phosphate. The maximum percentage release of DPBA, DPPA and CPPA into 0.008 M sodium phosphate was found to be different; 51, 76 and 87 %, respectively. Rapid release of the phenoxyherbicides was observed at the beginning  of the process followed by a slower one near to the equilibrium. Kinetic study shows the release behavior for all the phenoxyherbicides from their nanohybrids is governed by pseudo second order.

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Author Biographies

Norhayati Hashim

Chemistry Department, Faculty of Science and Mathematics, Universiti Pendidikan Sultan Idris, 35900 Tanjong Malim, Perak

Mohd Zobir Hussein

Advanced Materials and Nanotechnology Laboratory, Institute of Advanced Technology (ITMA), Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia

Illyas Md Isa

Chemistry Department, Faculty of Science and Mathematics, Universiti Pendidikan Sultan Idris, 35900 Tanjong Malim, Perak

Azlan Kamari

Chemistry Department, Faculty of Science and Mathematics, Universiti Pendidikan Sultan Idris, 35900 Tanjong Malim, Perak

Azmi Mohamed

Chemistry Department, Faculty of Science and Mathematics, Universiti Pendidikan Sultan Idris, 35900 Tanjong Malim, Perak

Mohamad Saufi Rosmi

Advanced Materials and Nanotechnology Laboratory, Institute of Advanced Technology (ITMA), Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia.

Adila Mohamad Jaafar

Advanced Materials and Nanotechnology Laboratory, Institute of Advanced Technology (ITMA), Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia.

Published
2019-01-19
How to Cite
Hashim, N., Hussein, M. Z., Md Isa, I., Kamari, A., Mohamed, A., Rosmi, M. S., & Mohamad Jaafar, A. (2019). Layered Double Hydroxide as a Potential Matrix for Controlled Release Formulation of Phenoxyherbicides. Journal of Science and Mathematics Letters, 4(2), 22-36. Retrieved from https://ejournal.upsi.edu.my/index.php/JSML/article/view/391

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