Abstract— Diminution of Malathion and Phorate from aqueous solutions by tea waste biomass was examined in a batch experimental setup. Waste tea powder, obtained from University canteen, S.V. University, Tirupati, India has been used as an effective material for the reduction of Malathion and Phorate from aqueous solutions. Characterization of the adsorbent was studied using SEM micrograph and Fourier Transform Infrared spectral analysis. From the FTIR spectrum it is observed that the change in peak position at 3390 cm−1 in the spectrum of the Phorate and Malathion loaded tea powder indicates the binding of these pesticides with hydroxyl groups. The working solutions of the pesticides are in the range of 0.1µg – 1.0µg for Malathion and 0.05µg – 0.5µg for phorate. It was observed that percentage adsorption increased with pH of the liquid phase and reached an optimum value of 95 % for Malathion and 94 % for phorate at pH 7.4 ± 0.2 and pH 7.5 ± 0.2, respectively. The dosage of the adsorbent had showed considerable effect on the adsorption of Malathion and Phorate.
Keywords— Adsorption, Pesticides, Malathion, Phorate and Waste Tea Powder.
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