Bio

Publications


2019

Adwet, WM, Pant HJ, MANGALA MJ,....  2019.  Evaluation of hydraulic performance of an anaerobic pond using radiotracer technique. Applied Radiation and …. : Elsevier AbstractWebsite

A radiotracer investigation was carried out in a wastewater stabilization pond using radiotracer technique. Residence time distribution (RTD) of wastewater was measured using Iodine-131 as a radiotracer. The measured RTD was treated and mean residence time …

M.Adwet, W, J.Pant H, J.Mangala M, A.Masinza S.  2019.  Evaluation of hydraulic performance of an anaerobic pond using radiotracer technique. Applied Radiation and Isotopes. 145:101-105.

2018

KokonyaSichangi, E, Kalambuka Angeyo H, Dehayem-Kamadjeu A, Mangala M.  2018.  Hybridized robust chemometrics approach for direct rapid determination of trace biometals in tissue utilizing energy dispersive X-ray fluorescence and scattering (EDXRFS) spectrometry. Radiation Physics and Chemistry. 153:198-207.

2013

Kinyua, AM, Maina DM, MANGALA MJ, GATARI MJ.  2013.  Energy dispersive X-ray fluorescence (EDXRF) in non-destructive testing of oil samples. : erepository.uonbi.ac.ke AbstractWebsite

A rapid non-destructive, multi-elemental and ultra-sensitive analytical technique of engine oil analysis is described. Using" an x-ray excitation source and Si (Li) detector for the1 measurements, the deterioration of an internal combustion engine) is evaluated from results …

2012

Kaniu, MI, Angeyo KH, Mwala AK, MANGALA MJ.  2012.  Direct rapid analysis of trace bioavailable soil macronutrients by chemometrics-assisted energy dispersive X-ray fluorescence and scattering spectrometry. Analytica chimica acta. : Elsevier AbstractWebsite

Precision agriculture depends on the knowledge and management of soil quality (SQ), which calls for affordable, simple and rapid but accurate analysis of bioavailable soil nutrients. Conventional SQ analysis methods are tedious and expensive. We demonstrate …

2011

Osoro, MK, Rathore IV, MANGALA MJ, Mustapha AO.  2011.  Radioactivity in surface soils around the proposed sites for Titanium Mining Project in Kenya. : Citeseer AbstractWebsite

Radioactivity measurements were carried out around Maumba and Nguluku villages, two of the proposed sites for titanium mining in the coastal area of Kenya. Samples of surface soils were analyzed using a HPGe gamma spectrometer. The average activity concentrations for …

Kaniu, MI, Angeyo KH, MANGALA MJ,....  2011.  Feasibility for chemometric energy dispersive X‐ray fluorescence and scattering (EDXRFS) spectroscopy method for rapid soil quality assessment. X‐Ray …. : Wiley Online Library AbstractWebsite

Soil quality assessment (SQA) is important for modulating agricultural productivity and thus requires simple and rapid analysis of soil (macro & micro) nutrients (here called soil quality indicators–SQIs). We report proof of concept of a chemometrics‐assisted energy dispersive …

2010

…, Wepukhulu GW, Ntihabose L, Maina DM, MANGALA MJ,....  2010.  Status and Prospects in Research Infrastructure Development in Nuclear Analytical Spectrometry and Radiometric Instrumentation Methodologies for Environmental …. : erepository.uonbi.ac.ke AbstractWebsite

Since 2002 the Department of Physics at the University of Nairobi has established the Applied Nuclear and Radiation Physics Division for graduate training in a variety of nuclear science fields and research, the major line of which is method development in analytical …

2008

Kinyua, AM, GATEBE CK, MANGALA MJ.  2008.  Monitoring of air particulate matter (APM), background radiation, analysis of trace metals and other parameters in some parts of Kenya. : inis.iaea.org AbstractWebsite

[en] This project undertook various studies monitoring workplace environments and assessing some occupational health status. The studies included monitoring levels of airborne particulate matter (APM), natural background radiation, emissions inventory …

Kinyua, AM, GATEBE CK, MANGALA MJ,....  2008.  Monitoring of airborne particulate matter (APM), background radiation, analysis of trace metals and other parameters in some parts of Kenya. IAEA-TECDOC …. : www-pub.iaea.org AbstractWebsite

This project undertook various studies monitoring workplace environments and assessing some occupational health status. The studies included monitoring levels of airborne particulate matter (APM), natural background radiation, emissions inventory, analysis of …

2007

…, Mbuzukongira P, MANGALA MJ.  2007.  Occupational radiation exposures of artisans mining columbite–tantalite in the eastern Democratic Republic of Congo. Journal of Radiological …. : iopscience.iop.org AbstractWebsite

Artisans in Masisi and other parts of the North Kivu province in the eastern Democratic Republic of Congo (DRC) mine columbite–tantalite mineral ores (also called'coltan') for the tantalum content. The potential occupational radiation exposures in the course of this …

2005

MANGALA, MJ.  2005.  Urban Farming along Nairobi River. : erepository.uonbi.ac.ke AbstractWebsite

Nairobi River originates from a swamp near Kikuyu town, about 24 kilometres west of Nairobi city centre and meanders across the city covering a stretch of about 30 kilometres. Within the city area, the river is contaminated by runoff waters; untreated effluent from …

J., MRMANGALAMICHAEL, M. MRMAINADAVID.  2005.  Trace Elements in some selected dietary staples in Kenya. Inaugural National Nutrition Congress . : University of Nairobi.
M., MRMAINADAVID, J. MRMANGALAMICHAEL.  2005.  Urban Farming along Nairobi River: How Safe are the Food Crops. Inaugural National Nutrition Congress . : University of Nairobi. Abstract
Nairobi River originates from a swamp near Kikuyu town, about 24 kilometres west of Nairobi city centre and meanders across the city covering a stretch of about 30 kilometres. Within the city area, the river is contaminated by runoff waters; untreated effluent from residential areas and small-scale industries; and a significant volume of treated wastewaters from Kariobangi Sewerage Treatment Works. Its waters are used for various purposes, in particular agricultural, both within and outside the city environs. Most often the food crops grown along this river appear healthy and are attractive to customers. However, it is suspected that the waters used for irrigation purposes may contain high levels of heavy metals and these may end up being assimilated by these food crops and thereafter enter the food chain.

2004

…, Kinyua AM, Nderitu SK, Agola JO, MANGALA MJ.  2004.  Indoor radon levels in coastal and rift valley regions of Kenya. : IAEA-CN-91/56 401-404 Abstract
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J., MRMANGALAMICHAEL.  2004.  Assessment Of Ozone, Nitrogen Oxide, Air Particulate Matter(PM10) And Trace Elements Levels In The Ambient Air Of Nairobi City.. Workshop on Air Pollution Studies in Southern and East Africa, University of Botswana, Gaborone,. : University of Nairobi.

2003

MANGALA, MJ, Korier KA, Maina DM, Kinyua AM.  2003.  Determination of trace elements in mineral water samples using total reflection X ray fluorescence (TXRF). : inis.iaea.org AbstractWebsite

[en] Full text: Preliminary results of trace element analysis by TXRF of drinking tap water, various brands of local and imported bottled water samples sold in Nairobi as mineral are presented. The levels of potassium (K) ranged from 0.2 to 28.9 μg/ml, calcium (Ca) 2.2 to …

…, Kinyua AM, Nderitu SK, Agola JO, MANGALA MJ.  2003.  Indoor radon ({sup 222} Rn) levels in coastal and rift valley regions of Kenya. : osti.gov AbstractWebsite

Measurements of indoor radon levels by electret technique in Coastal and Rift Valley Region of Kenya are reported. The results indicate a large variation in the concentrations (5-704 Bq m {sup-3}) and that remedial action is necessary in some dwellings. The geological …

…, Kinyua AM, Nderitu SK, Agola JO, MANGALA MJ.  2003.  Indoor radon (222Rn) levels in coastal and rift valley regions of Kenya. : inis.iaea.org AbstractWebsite

[en] Measurements of indoor radon levels by electret technique in Coastal and Rift Valley Region of Kenya are reported. The results indicate a large variation in the concentrations (5-704 Bq m-3) and that remedial action is necessary in some dwellings. The geological …

J., MRMANGALAMICHAEL.  2003.  Analysis of Local mineral and tap waters samples using Total Reflection(TXRF) for Heavy metal content. 9th International Symposium on Radiation Physics, Protea Hotel President, Cape Town. : University of Nairobi.

2002

M., MRMAINADAVID, J. MRMANGALAMICHAEL.  2002.  Indoor Radon (222 Rn) Levels in Coastal and Rift Valley Regions of Kenya. International Atomic Energy Agency (IAEA), IAEA-CN-91/56, p. 401-405,. : University of Nairobi.

2001

J., MRMANGALAMICHAEL.  2001.  EDXRF analysis of local and imported pica soil samples. East African Journal of. : University of Nairobi.

2000

Wamwangi, DM, Rathore IVS, Katia SK, MANGALA MJ.  2000.  Major and trace bioelements-trace element analyses of pollen, bee tissue, and honey by total reflection and radioisotope excited x-ray fluorescence …. : erepository.uonbi.ac.ke AbstractWebsite

Elemental analyses of pollen, bee tissue and honey samples collected from selected areas of Kenya have been carried out using total reflection X-ray fluorescence (TXRF) and radioisotope excited X-ray fluorescence (EDXRF) techniques. The objective was to find out …

MANGALA, MJ, Korir KA, Maina DM, Kinyua AM.  2000.  Trace element analysis of mineral and tap water samples using total reflection x-ray fluorescence (TXRF). : osti.gov AbstractWebsite

Results of trace element analysis by TXRF of tap water and various brands of bottled mineral water samples which are representative of local and imported brands sold in Nairobi are reported. The variation in elemental concentrations in water samples analyzed were as …

Kinyua, AM, GATEBE CK, MANGALA MJ, Korir AK,....  2000.  Monitoring of suspended particulate matter (SPM), heavy metals and other parameters in some workplaces. : inis.iaea.org AbstractWebsite

This report presents results of measurements of sound levels, chemical analysis of air particulate matter and soil samples from two factories in Nairobi. A preliminary assessment of suspended particulate matter (SPM) in a residential site and its possible impacts on acute …

J., MRMANGALAMICHAEL.  2000.  Uptake Characteristics Of Trace Elements: Lead, Zinc, Cadmium And Mercury By Selected Food Crops Grown Along Nairobi River. Proceedings of 5th Kenya Meteorological Society Workshop, Mombasa. : University of Nairobi.
J., MRMANGALAMICHAEL.  2000.  Trace element analyses of pollen bee tissue and honey by total reflection and radioisotope exciled x-ray fluorescence spectrometr. Journal Of Trace Microprobe Techniques 18(2). 303 . : University of Nairobi.

1999

Kinyua, AM, GATEBE CK, MANGALA MJ.  1999.  Environmental and industrial applications of XRF and related techniques at the Institute of Nuclear Science, University of Nairobi, Kenya. : osti.gov AbstractWebsite

ENVIRONMENTAL AND INDUSTRIAL APPLICATIONS OF XRF AND RELATED TECHNIQUES AT THE INSTITUTE OF NUCLEAR SCIENCE, UNIVERSITY OF NAIROBI, KENYA AM KJNYUA1, CK GATEBE1, MJ MANGALA1, XA9953279" DM MAINA1, AK KORIR1, K …

1998

MANGALA, MJ.  1998.  Analysis of soil for trace elements along two highways of Kenya. East African Journal of Science. : erepository.uonbi.ac.ke AbstractWebsite

Energy dispersive X-ray fluorescence technique has been used to study the levels of lead and other toxic trace elements in the soil samples collected along two major highways (Mombasa and Thika) of Kenya at the various distances off the road. The soil samples from …

Kinyua, AM, GATEBE CK, MANGALA MJ.  1998.  Heavy metal analysis of suspended particulate matter (SPM) and other samples from some workplaces in Kenya. : inis.iaea.org AbstractWebsite

Air pollution studies in Nairobi are indicating a rising trend in the particulate matter loading. The trend is mainly attributed to increased volume of motor vehicles, the physical change of the environment, agricultural and industrial activities. In this study, total suspended …

Hashim, NO, Kinyua AM, MANGALA MJ, Rathore IV.  1998.  EDXRF analysis of lead and other toxic trace elements in soil samples along two major highways of Kenya. : erepository.uonbi.ac.ke AbstractWebsite

Adjacent lands along most major highways of Kenya are left as open spaces, or used for small scale farming and grazing of cattle and livestock. Some grass and plants are expected to have high levels of lead and other toxic metals. So far, no study has been carried out to …

Kinyua, AM, MANGALA MJ, GATEBE CK, Kamau GN,....  1998.  Suspended particulate matter in Nairobi and the impact on health. Abstract
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