dc.contributor.author | Bettinetti, Roberta | |
dc.contributor.author | Quadroni, Silvia | |
dc.contributor.author | Crosa, Giuseppe | |
dc.contributor.author | Harper, David | |
dc.contributor.author | Dickie, Jennifer | |
dc.contributor.author | Kyalo, Margaret | |
dc.contributor.author | Mavuti, Kenneth M | |
dc.contributor.author | Galassi, Silvana | |
dc.date.accessioned | 2013-05-15T15:24:39Z | |
dc.date.available | 2013-05-15T15:24:39Z | |
dc.date.issued | 2011 | |
dc.identifier.citation | A Journal of the Human Environment, 40(4):341-350. 2011 | en |
dc.identifier.uri | http://www.bioone.org/doi/full/10.1007/s13280-011-0142-8 | |
dc.identifier.uri | http://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/23372 | |
dc.description.abstract | Dichlorodiphenyltrichloroethane (DDT) is still
used in Africa for the indoor control of malaria and it may
represent a potential hazard for wildlife. The littoral sediments of two alkaline-saline lakes, Natron (Tanzania) and
Bogoria (Kenya), in the Eastern Rift Valley, supporting
large populations of lesser flamingos (Phoeniconaias
minor), were analysed for DDT residues. Physical–chemical analyses (temperature, conductivity, pH and dissolved
oxygen) were also performed on the water of the two lakes
and in the tributaries of Lake Natron, to evaluate the
influence of the environmental variables on pollutant
occurrence. At Lake Natron, around 1 km from the sediment collection sites, tree leaves of Acacia tortilis were
also collected. The main metabolite found in all sediment
samples was pp’DDE, whilst equal concentrations of
pp’DDT and pp’DDE were measured in acacia leaves. The
levels of DDTs measured in the sediments were within
5.9–30.9 ng g-1
d.w., reaching the maximum value in a
tributary of Lake Natron. On the whole, the contamination
of Lake Natron and Lake Bogoria basins seems to be quite
moderate. Nevertheless, the pp’DDE/pp’DDT ratio equals
1 in the Acacia tortilis leaves, which makes one suppose
that the input of the parent compound was rather recent and
could have been from aerial transport or dust from relatively close-by old pesticides storage sites. | en |
dc.publisher | Royal Swedish Academy of Sciences | en |
dc.title | A Preliminary Evaluation of the DDT Contamination of Sediments in Lakes Natron and Bogoria (Eastern Rift Valley, Africa) | en |
dc.type | Article | en |
dc.type | Book | en |
local.publisher | Department of Biology, University of Milan, | en |
local.publisher | Department of Geography, University of Leicester, | en |
local.publisher | Department of Structural and Functional Biology, University of Insubria, Via Dunant 3, 21100 Varese, Italy | en |
local.publisher | School of Biological Sciences, University of Nairobi | en |
local.publisher | Department of Chemical and Environmental Sciences, University of Insubria, Via Valleggio 11, 22100 Como, Italy | en |