Removal of malathion and diazinon from wastewater by modified iron kaolin and UV / H2O2

During recent years, organophosphates due to widespread usage in agriculture constitute major pollutants of the aquatic environment and soil. Therefore, their elimination by using heterogeneous catalyst is a good manner to overcome these disadvantages. Here, motivated by this case, kaolin modified by Fe-ion exchange. The modified photocatalyst was characterized by XRD, XRF, FESEM, FT-IT and EDX technique. The catalytic activity of this system was investigated in the photodegradation of malathion and diazinon in the presence of H2O2 under UV irradiation. The effect of various parameters including catalyst amount, H2O2 concentration, pesticide concentration and time reaction on photodegradation yield was investigated. The COD experiment indicated the mineralization of pesticide. Photocatalytic degradation of dye contamination follow a pseudo-first order kinetic

Keywords:

Organophosphate compounds , Water pollution , Ion exchange , Modified kaolin