Distribution of Pesticide Residues in Soil and Sediments from Areas of Coast Region Near a Heavily Contaminated Site in Tanzania

Simple item page
dc.contributor.authorMahugija, John A.M.
dc.contributor.authorKishimba, Michael A.
dc.date.accessioned2018-09-05T12:06:14Z
dc.date.available2018-09-05T12:06:14Z
dc.date.issued2007-12
dc.description.abstractSoil and sediment samples collected from 0.1 to 25 km away from a heavily contaminated site at Vikuge farm in Coast region were extracted, cleaned by GPC and analyzed using GC-ECD and GC-MS. Ten compounds namely p,p’-DDT, o,p’-DDT, p,p’-DDE, o,p’-DDE, p,p’-DDD, o,p’-DDD, pentachloroanisole, a-HCH, b-HCH and g-HCH were detected in the samples. In general, contaminants during this round of sampling were widespread. The compounds o,p’- and p,p’-DDT, DDD and DDE were detected in 64.3% - 100% of the samples. Pentachloroanisole was detected in 95.5% of the soil and 50% of the sediment samples, while for the HCH isomers, the highest frequency was for b-HCH (57.1%) in sediments. The concentrations of total DDT were up to 534 ng/g dry weight (dw) in soil and 1945 ng/g dw in sediments. The highest concentrations for total HCH were 3.8 ng/g dw in soil and 24.6 ng/g dw in sediments. The very strong positive correlations in the concentrations of the detected compounds suggest a common source. The low DDE/DDT ratios (0.01 - 0.83) in all but one sample indicate input of significantly non-degraded DDT from the source. The high DDE/DDT ratio (1.35) in one soil sample indicates significant degradation. The low a-HCH/g- HCH ratios in the samples indicate inputs of lindane. There is an urgent need for remedial actions to solve the problem at the source.en_US
dc.description.sponsorshipGerman Academic Exchange Service (DAAD)en_US
dc.identifier.citationMarco, J.A.M., Kishimba, M.A. 2007. Distribution of Pesticide Residues in Soil and Sediments from Areas of Coast Region Near a Heavily Contaminated Site in Tanzania. International Journal of BioChemiPhysics16, 7-16.en_US
dc.identifier.issn1019-7648
dc.identifier.urihttp://hdl.handle.net/20.500.11810/4773
dc.language.isoenen_US
dc.publisherUniversity of Nairobien_US
dc.subjectPesticide residues; soil; sediment; Tanzaniaen_US
dc.titleDistribution of Pesticide Residues in Soil and Sediments from Areas of Coast Region Near a Heavily Contaminated Site in Tanzaniaen_US
dc.typeJournal Articleen_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Mahugija_Biochemphy_Soilsed.pdf
Size:
579.73 KB
Format:
Adobe Portable Document Format
Description:
Main article
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
Chemistry Department