Kinetic of controlled release study (2,4-Dichloro and 4-chloro phenoxy acetate )from Zn/Al-layered double hydroxideDepartment of chemistry ,faculty of science-Karbela University

Abstract

Soil Pollution by herbicides or other pollutants then poured in to ground water is consider as the most important reasons that effects on human health to control this problem we study presents release of phenoxy herbicides 2,4-di chloro and 4-chloro phenoxy acetate as nano hybrids from layers double hydroxide (LDHs) to different aqueous solution as carbonate , phosphate and chloride for different concentration by using direct method of ion exchange . As kinetic study effect know of all aqueous solution on release rate both anionic in same time from layer double hydroxide . was found to be controlled by whole process is governed by pseudo-second order rate expression. The rate release both anionic was found higher than 2٬4-D > 4-CPA.The rate release in to aqueous solution carbonate > phosphate > chlorate . The aim of this study is the release of phenoxy herbicides agrochemicals from the nanohybird compounds can be controlled by ion exchange process to reduce environment pollution .