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Von Hellens, Anastasia, 2013. Groundwater quality of Malawi : fluoride and nitrate of the Zomba-Phalombe plain. First cycle, G2E. Uppsala: SLU, Dept. of Soil and Environment

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Abstract

Contamination of groundwater is a widespread issue around the globe and the water quality is highly dependent on the geology as well as anthropogenic interventions in the area. High (0.9 – 1.2 mg F-/L) fluoride levels in groundwater can give rise to dental fluorosis and have been reported in several areas of Malawi. Further studies of groundwater contamination apart from fluoride are limited. The aim of this study was to investigate the fluoride and nitrate concentrations of groundwater in boreholes around Lake
Chilwa and the origin of the contaminants. The hypothesis was that elevated concentrations of fluoride and low nitrate concentrations would be found in the area.

On average, most fluoride and nitrate values were non-measurable, however, on some sites elevated concentrations were measured. Around the village
of Jali, levels ranging from 1.5 to 4.5 mg F-/L were found. The village of Nine miles had elevated levels of nitrate in the water with 48.5 mg NO3 -/L as the highest. The latter is an interesting result since levels greater than 50
mg NO3 -/L have been correlated with blue-baby syndrome, a condition lethal for bottle-fed infants. Due to these findings, further studies of the area are recommended along with implementation of nitrate-contamination prevention
measurements.

Main title:Groundwater quality of Malawi
Subtitle:fluoride and nitrate of the Zomba-Phalombe plain
Authors:Von Hellens, Anastasia
Supervisor:Mwatseteza, Jonas and Persson, Ingmar
Examiner:Eriksson, Jan
Series:Examensarbeten / Institutionen för mark och miljö, SLU
Volume/Sequential designation:2013:10
Year of Publication:2013
Level and depth descriptor:First cycle, G2E
Student's programme affiliation:NY003 Agricultural Programme - Soil/Plant 270 HEC
Department:(NL, NJ) > Dept. of Soil and Environment
(S) > Dept. of Soil and Environment
Keywords:groundwater, quality, fluoride, nitrate, Malawi, East Africa
URN:NBN:urn:nbn:se:slu:epsilon-s-2365
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-s-2365
Subjects:Water resources and management
Soil chemistry and physics
Chemistry
Language:English
Deposited On:12 Jun 2013 12:38
Metadata Last Modified:12 Jun 2013 12:38

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