Browsing Faculty of Science & Technology (FST) by Author "Lalah J O."
Now showing items 1-9 of 9
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Adsorption/Desorption and Mobility of Carbofuran in Soil Samples from Kenya
Lalah J O.; Wandiga Shem O. (University of NairobiDepartment of Chemistry, College of Biological and Physical Sciences, University of Nairobi, 1996-04) -
Analysis of heavy metals in water and surface sediment in five Rift Valley lakes in Kenya for assessment of recent increase in anthropogenic activities
Ochieng E Z.; Lalah J O.; Wandiga Shem O. (Department of Chemistry, 2007)The concentrations of heavy metals Ag, Cd, Co, Cr, Cu, Mn, Ni, Pb, Sn and Zn were analysed in water and surface sediments of five Rift Valley lakes Nakuru, Elementaita, Naivasha, Bogoria and Baringo in Kenya. The dissolved ... -
Assessment of polycyclic aromatic hydrocarbons in Lates niloticus, Oreochromis niloticus and Rastrineobola argentea as sources of human exposure in Kisumu Bay, Winam Gulf of Lake Victoria
Onyango A A.; Lalah J O.; Wandiga Shem O.; Gichuki J. (Department of Chemistry, 2012)The concentrations of polycyclic aromatic hydrocarbons (PAHs) in Lates niloticus, Oreochromis niloticus and Rastrineobola argentea from three beaches were assessed to establish whether they are sources of human exposure ... -
Copper binding by dissolved organic matter in freshwaters in Kenya
Lalah J O.; Wandiga Shem O. (Department of Chemistry, 2007)The binding of Cu2+ to dissolved organic matter in eight different natural water samples obtained from different locations in Kenya was studied by potentiometric titration method. The DOC contents of the eight natural water ... -
Distribution and Dissipation of Carbofuran in a Paddy Field in the Kano Plains of Kenya
Lalah J O.; Wandiga Shem O. (University of NairobiDepartment of Chemistry, College of Biological and Physical Sciences, University of Nairobi, 1996-04) -
The effects of Mn2+, Ni2+, Cu2+, Co2+ and Zn2+ ions on pesticide adsorption and mobility in a tropical soil.
Lalah J O.; Njogu S N.; Wandiga,Shem O. (Department of Chemistry, 2009)The adsorption behaviour of DDT in a tropical silt-clay soil from Kenya showed that addition of increasing metal ion concentrations from 10 to 100 microg/g of soil, reduced the % DDT adsorption in the soil by factors ranging ... -
Heavy Metals in Water and Surface Sediments in Winam Gulf of Lake Victoria, Kenya
Ochieng E Z.; Lalah J O.; Wandiga Shem O. (University of NairobiDepartment of Chemistry, College of Biological and Physical Sciences, University of NairobiDepartment of Chemistry, Maseno University, 2006-09) -
Seasonal variability in cadmium, lead, copper, zinc and iron concentrations in the three major fish species, Oreochromis niloticus, Lates niloticus and Rastrineobola argentea in Winam Gulf, Lake Victoria: impact of wash-off into the lake
Ongeri D M.; Lalah J O.; Wandiga Shem O.; Schramm K W.; Michalke B. (Department of Chemistry, 2012)Trace metals Cadmium (Cd), Lead (Pb), Copper (Cu), Zinc (Zn) and Iron (Fe) were analyzed in edible portions of three main finfish species namely Lates niloticus, Oreochromis niloticus and Rastrineobola argentea sampled ... -
Water Quality and Trace Metal Distribution in a Pristine Lake in the Lake Basin in Kenya
Ochieng E Z.; Lalah J O.; Wandiga Shem O. (University of NairobiDepartment of Chemistry, College of Biological and Physical Sciences, University of NairobiDepartment of Chemistry, Maseno University, 2008-04)Water and surface sediment samples taken from various locations within Lake Kanyaboli in the Lake Victoria basin were analysed to determine the concentration and distribution of heavy metals. There were wide ranges in ...