Elimination of Organophosphorus Pesticides from Wastewater on Fiber Cotton Waste: Kinetic Models Approach

摘要

The objective of this work is therefore, to study the removal of three organophosphate pesticides (diazinon, fenthion and malathion), by their adsorption on waste cotton. The waste fiber cotton was characterized using FTIR, XRD, BET and SEM techniques. The effects of pH, contact time, adsorbent dose, initial concentration, temperature and ionic strength were evaluated and the removal efficiency of each parameter was established. The adsorption isotherms on waste cotton fibers, for concentrations of malathion and fenthion chosen for the initial experimental data, were interpreted by the Redlich-Peterson and Langmuir models. The Redlich-Peterson and Langmuir models for malathion retention for grafted cellulose. The results of the kinetic study for allpesticides showed that retention was extremely rapid. In fact, the linear regressions showed that the pseudo second order model monitors both the kinetics for diazinon and the pseudo first order model monitors fenthion, thus, malathion. This was clearlyconfirmed by the corresponding correlation factor values for each model.