Science Journal of Chemistry
Volume 1, Issue 1, April 2013, Pages: 7-13
Received: Apr. 23, 2013;
Published: Apr. 2, 2013
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Joanne Atieno Ogunah, Department of Chemistry, Maseno University, P. O. Box 333-40105, Maseno, Kenya
Chrispin Ounga Kowenje, Department of Chemistry, Maseno University, P. O. Box 333-40105, Maseno, Kenya
Elly Tetty Osewe, Kisumu Polytechnic P. O. Box 143-40100, Kisumu, Kenya
Joseph Owour Lalah, Department of Chemical Sciences and Technology, Technical University of Kenya, P. O. Box 52428-00200, Nairobi, Kenya
David Agoro Jaoko, Department of Chemistry, Maseno University, P. O. Box 333-40105, Maseno, Kenya
Robert Njuguna Koigi, Kenya Plant Health Inspectorate Service, P. O. Box 49592-00100 Nairobi, Kenya
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.
Joanne Atieno Ogunah,
Chrispin Ounga Kowenje,
Elly Tetty Osewe,
Joseph Owour Lalah,
David Agoro Jaoko,
Robert Njuguna Koigi,
Effects of Zeolites X and Y on the Degradation of Malathion in Water, Science Journal of Chemistry.
Vol. 1, No. 1,
2013, pp. 7-13.
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