Pesticide pollution remains severe after cleanup of a stockpile of obsolete pesticides at Vikuge, Tanzania.
High levels of DDT residues and hexachlorocyclohexanes (HCHs) were found in soil, well water, and surface water around a collapsed pesticide storage shed at Vikuge Farm, Tanzania. Residues of DDT and HCHs were found at three soil depths down to 50 cm. Surface soil samples contained up to 28% total DDT and 6% total HCH residues. Water samples had concentrations of up to 30 microg L(-1) of organochlorine pesticides. Other compounds detected were aldrin, azinphos-methyl, carbosulfan, gamma-chlordane, chlorprofam, heptachlor, hexazinone, metamitron, metazachlor, pendimethalin, and thiabendazole. Although the visible remains of pesticides have been removed, the remaining soil is itself hazardous waste and poses a risk to the environment and the inhabitants of the surrounding villages. These findings show the necessity to follow up the environmental situation at former storage sites of obsolete stocks of pesticides, and that the environmental problems are not necessarily solved by removing the visible remains.
Elfvendahl
Sara
S
Swedish University of Agricultural Sciences, Uppsala. sara.elfvendahl@ma.slu.se
Mihale
Matobola
M
Kishimba
Michael A
MA
Kylin
Henrik
H
D003634:DDT / Q000032:analysis*; D004784:Environmental Monitoring / Q000379:methods; D004787:Environmental Pollution / Q000517:prevention & control* / Q000706:statistics & numerical data*; D001556:Hexachlorocyclohexane / Q000032:analysis*; D010573:Pesticide Residues / Q000032:analysis*; D012989:Soil Pollutants / Q000032:analysis; D013636:Tanzania; D014874:Water Pollutants, Chemical / Q000032:analysis
D010573:Pesticide Residues; D012989:Soil Pollutants; D014874:Water Pollutants, Chemical; D001556:Hexachlorocyclohexane; D003634:DDT