REMOVAL OF METHOMYL PESTICIDE BY ADSORPTION USING NOVEL HYPERCROSSLINKED POLYMER OF MACRONET MN-100

Carbamates are the most commonly used insecticides in Taiwan, in which methomyl takes the top-ranking of aggregate sales. Due to the long half-life of methomyl in ground water, the stringent pesticide standard of water bodies and protection of human health, the treatment technologies of contaminated water bodies are required urgently. Novel hypercrosslinked polymer (Macronet MN100 denoted as MN-100) with large surface area and microporous pore volume possesses great potential for the removal of pesticide from the aqueous solution. This study attempts to apply an adsorption process to remove methomyl from aqueous environment using MN-100. The adsorption equilibrium and kinetics of methomyl on MN-100 were predicted by using Langmuir and Freundlich isotherms, and simple kinetic models (e.g., Lagergren pseudo-first-order, pseudo-second-order and Elovich rate equations). Furthermore, the effect of pH value of the solutions on adsorption capacity of methomyl also has been investigated in this study.