Concentrations of Metals in River Sediment and Wetland Vegetations in Mining, Lake Victoria basin, Tanzania

Simple item page
dc.contributor.authorMachiwa, John F.
dc.date.accessioned2016-03-23T13:41:10Z
dc.date.available2016-03-23T13:41:10Z
dc.date.issued2003
dc.description.abstractLevels of metals were determined in river sediment, rice and sugarcane juice from Lake Victoria basin where small-scale gold processing activities are carried out to assess levels of contamination. Concentrations of metals in river sediments were generally high in areas that were closest to gold ore processing sites. For instance, mercury was highest (36.3 ±12.8 mg/g dw) in river sediments of Tigiti River in Mugumu District. Other heavy metals (Cd, Pb, Zn and Cu) had highest concentrations (2.20±0.71, 208±19.3, 412±20.1 and 132.7±11.9mg/g dw, respectively) in sediment samples from Kagota. The concentration of arsenic was highest (985.0±67.2 mg/g dw) in Mugusu River sediment. Mercury concentration in rice was highest (378.5±15.1mg/kg dw) in samples from Lwamgasa wetland and lowest (47.9±2.9 mg/kg dw) in samples from Saragurwa wetland. Cadmium concentrations in rice ranged from 2.3-5.5mg/kg dw, Zn and Cu ranged from 16340-27280mg/kg dw and 1150-2240mg/kg respectively. Arsenic was not detected in any rice sample. Lead was only detected in rice from Sengerema (150±12mg/kg dw), in a wetland that is close to the main road. Mercury concentrations in sugarcane juice were below the limit of detection (0.01mg/l) in all samples even those that were harvested closest to the gold ore-washing site at Samina. It is concluded that small-scale gold mining activities contaminate watercourses close to ore washing sites.en_US
dc.identifier.citationMachiwa, J.F., 2003. Concentrations of metals in river sediment and wetland vegetations in mining, Lake Victoria basin, Tanzania. Tanzania Journal of Science, 29(2), pp.81-88.en_US
dc.identifier.doi10.4314/tjs.v29i2.18380
dc.identifier.issn0856 1761
dc.identifier.urihttp://hdl.handle.net/123456789/1284
dc.language.isoenen_US
dc.publisherUniversity of Dar Es Salaamen_US
dc.subjectConcentrations of metalsen_US
dc.subjectriveren_US
dc.subjectSedimentsen_US
dc.subjectwetlandsen_US
dc.subjectminingen_US
dc.subjectLake Victoria basinen_US
dc.subjectvegetationsen_US
dc.subjectTanzaniaen_US
dc.titleConcentrations of Metals in River Sediment and Wetland Vegetations in Mining, Lake Victoria basin, Tanzaniaen_US
dc.typeJournal Article, Peer Revieweden_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Concentrations of Metals in River Sediment and Wetland Vegetations in Mining, Lake Victoria basin, Tanzania.pdf
Size:
498.31 KB
Format:
Adobe Portable Document Format
Description:
Full Text
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Department of Aquatic Sciences and Fisheries Technology