Effect of Gamma Radiation On Materials Used for Removal of Some Environmental Pollutants

Abstract

This study was conducted to evaluate the feasibility of using Granular Activated Carbon and some Ion-Exchange Resins for the removal of pesticides from aqueous solutions. Analysis of effiuent components from carbon columns treating monosolute pesticide solutions was made to establish expected patterns of pesticide break­ through for full-scale column systems. The breakthrough curves were measured using laboratory scale column for several combinations of particle size, influent concentration, flow rate, column length, column diameter and the effects of the operation condition. Five pesticides were used in the present work : Two organophosphorus pesticides; Oufunack and Monocrotophose,two carbamate pesticides; Sevin and Osbac and one chlorohydro-carbon ; Kelthane. Also, equilibrium isotherms and intraparticle diffusivities were investigated through batch experiments in analyzing the adsorption of aqueous solutions of pesticides onto Granular Activated Carbon and Ion Exchange Resins. The results may be summarized as follows:-

1- Granular Activated Carbon (GAC) as adsorbent and Oufunack pesticide as sorbent material were used in column experiments to get the most suitable conditions for the column system operation.The column used was 3 em. in diameter with