Ladoke Akintola University of Technology

About: Ladoke Akintola University of Technology is a education organization based out in Ogbomoso, Nigeria. It is known for research contribution in the topics: Population & Adsorption. The organization has 2786 authors who have published 3066 publications receiving 36850 citations. The organization is also known as: Oyo State University of Technology & LAUTECH.

Insights into the Adsorption of Heavy Metals from Wastewater using Diatomaceous Earth

Abstract: The release of large quantities of heavy metals (e.g., Zn, Cu, Pb, Ni, Cd, etc.) into the natural environment has resulted in a significant number of environmental problems, disorderliness in human physiology, and other biological systems due to their high toxicity to plant, animal, and human life. This review paper explores the feasibility of diatomaceous earth for the adsorption of heavy metals from wastewater, its application in metal adsorption, and wastewater purification. Impregnating the diatomite surface with 0.38 g/g of manganese oxide gave a 2.4-fold increase in the adsorbent surface area. A number of equilibrium studies demonstrated that treated diatomite has a higher removal capacity for heavy metals from water than untreated diatomite. The future challenges and prospect of diatomite were also addressed. Conclusively, it was established that the use of diatomaceous earth is a promising technology in the removal of heavy metals from wastewaters and environment

Volatility and Mosquito Repellency of Hemizygia welwitschii Rolfe Oil and Its Formulations

Abstract: The volatility and mosquito repellency of the essential oil of Hemizygia welwitschii Rolfe (Laminaceae) and its prototype pharmaceutical formulations were examined and compared with those of a commercial mosquito repellent. At ambient temperature (28°C), neat Hemizygia oil had a volatility of 4.47±1.02 mg/cm2/h for 15 hours, after which the rate declined. The oil evaporated at 200 µg/cm2/h from 10% w/w liquid paraffin solutions, and at 60 µg/cm2/h from soft paraffin during the first 20 hours, after which the decline in evaporation rate was generally bi-phasic. The oil demonstrated concentration-dependent repellency against the mosquito Aedes aegypti. Its liquid paraffin solutions (5% to 15% concentration) prevented up to 50% of starved mosquitoes from feeding on a blood meal for 6 hours. Lower concentrations were less effective and inhibited feeding for only 1 hour. A 15% w/w oil-in-water emulsion formulation of Hemizygia oil produced 55% feeding deterrence in the mosquitoes for 2 hours. Neither the solution nor the emulsion formulations of the oil provoked any adverse reaction on human skin.

Study of atmospheric pollution levels by trace elements analysis of tree bark and leaves

Abstract: The concentrations of Pb, Cu, Zn, Ni, Fe, and Mn in leaf and bark samples of 7 tree species at 22 sampling locations with different pollution levels, in Ogbomoso, Nigeria, were investigated. The metal concentrations (mean ± RSD in m g g -1 ) in leaf and bark samples, respectively, were: Pb, 203 ± 70, 282 ± 120; Cu, 19.5 ± 4.2, 12.7 ± 2.6; Zn, 42.7 ± 12.9, 42.8 ± 13.1; Ni, 30.0 ± 11.1, 20.0 ± 9.9; Fe, 869 ± 348, 504 ± 118; and Mn, 108 ± 18, 73.7 ± 13.8. The high-pollution automobile parking lots showed higher levels of these elements (p KEY WORDS: Atmospheric pollution, Trace elements analysis, Tree bark, Tree leaves Bull. Chem. Soc. Ethiop. 2003 , 17(1), 11-17.

Inhibition of In Vivo Growth of Plasmodium berghei by Launaea taraxacifolia and Amaranthus viridis in Mice.

Abstract: Launaea taraxacifolia and Amaranthus viridis used by people of Western Africa in the treatment of malaria and related symptoms were assessed for their antiplasmodial value against the chloroquine sensitive strain of Plasmodium berghei. Crude extracts (200 mg/kg) and chloroquine (5 mg/kg) were administered to different groups of Swiss mice. The percentage of parasitemia, survival time, and haematological parameters were determined. Both extracts significantly ( ) inhibited parasitemia and improved survival time in infected mice. The crude extracts prevented loss of some haematological parameters. A. viridis had a distinct effect on the packed cell volume. The extract was able to protect the liver from some of the damage. This study however showed that the methanolic extracts of A. viridis and L. taraxacifolia possess antiplasmodial activity. The results of this study can be used as a basis for further phytochemical investigations in the search for new and locally affordable antimalarial agents.