Effects of zeolites X and Y on the degradation of malathion in water
Publication Date
2013Author
Kowenje, Chrispin O
Ogunah, Joanne A
Osewe, Elly T
Lalah, Joseph O
Jaoko, David A
Koigi, Robert N
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The inclusion of both zeolites X and zeolite Y significantly affected the dissipation of malathion in water. In the
fresh water, malathion degradation followed a pseudo-first order kinetics with concomitant half-life dropping from 8.76
hours in fresh water to 4.44 and 6.65 hours up on the introduction of faujasite X and Y, respectively. Zeolite X had higher
degradation efficiency as compared to the Y type. In pure fresh water, Malathion mainly hydrolyzed to form malathion
monocarboxylic and dicarboxylic acids as the only degradation products. However, in the presence of zeolites X and Y, in
addition to the degradation products obtained in the fresh water, dimethyldithiophosphate was also formed. Notably, all the
degradation products obtained are environmentally benign compared to the parent malathion. Eventually, both the adsorption
on the zeolite framework and zeolite catalyzed degradation processes contributed to the overall dissipation behavior of the
malathion and its degradation products.
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- Department of Chemistry [326]