Studies on the intercalation of calcium–aluminium layered double hydroxide-MCPA and its controlled release mechanism as a potential green herbicide

Abstract The intercalation of 2-methyl-4-chlorophenoxyacetic acid (MCPA) herbicide into the interlayer matrix calcium–aluminium layered double hydroxide (CaAl LDH) host has been successfully done via co-precipitation method to form CaAl-MCPA nanocomposite, proposing an eco-friendly alternative with adjusted delivery system for application. process is supported by powder X-ray diffraction analysis expanded spacing from 8.6 19.6 Å nanocomposite pH 13, which due inclusion larger size anion in interlayer. Next, absence a nitrate peak at 1,326 cm −1 and presence newly formed 1,416 Fourier transformed infrared spectroscopy also confirmed intercalation. significant decrease nitrogen content 0.50% indicates MCPA using carbon, hydrogen, nitrogen, sulphur analyser. release rate aqueous solutions initially rapid, followed slow order phosphate > carbonate chloride pseudo-second-order kinetic model. Hence, conducted studies exhibit successful its controlled mechanism as potential hybrid green herbicide.