Title
Distribution of trace elements in the aquatic ecosystem of the Thigithe river and the fish **Labeo victorianus** in Tanzania and possible risks for human consumption Distribution of trace elements in the aquatic ecosystem of the Thigithe river and the fish **Labeo victorianus** in Tanzania and possible risks for human consumption
Author
Faculty/Department
Faculty of Sciences. Biology
Publication type
article
Publication
Amsterdam ,
Subject
Chemistry
Biology
Source (journal)
The science of the total environment. - Amsterdam
Volume/pages
547(2016) , p. 48-59
ISSN
0048-9697
ISI
000369630600006
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
The aim of the present study was to assess the distribution of trace elements in the aquatic ecosystem of the Thigithe river. Samples of surface water, sediment and fish were collected up- and downstream of the North Mara Gold Mine (Tanzania) and following trace elements were analysed: As, Cd, Co, Cr, Cu, Hg, Ni, Pb and Zn. Trace element concentrations in surface water were below or near the detection limit. Regarding the sediments, relative high concentrations of arsenic at all sites and high levels of mercury at a site downstream of the mine where artisanal mining is performed were observed. Trace element concentrations in Ningu fish tissues (Labeo victorianus) were comparable to slightly higher than levels in fishes from unpolluted environments. For none of the measured human health risk by consumption of fish from the Thigithe river is expected when the Tanzanian average amount of 17 g/day is consumed. However, for Hg and As the advised maximum daily consumption of Ningu fish was lower than 100 g. As a result fishermen and people living along the shores of the river consuming more fish than the average Tanzanian fish consumption set by the FAO (2005) are possibly at risk.
E-info
https://repository.uantwerpen.be/docman/iruaauth/89cfbc/132028.pdf
Full text (open access)
https://repository.uantwerpen.be/docman/irua/23d3a2/132028.pdf
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