Issue

Vol. 2 No. 1 (2013)

Levels and Chemodynamics of Pesticides in Soil and Sediments At Kilombero Sugarcane Plantations and Environs, Morogoro Region, Tanzania

https://doi.org/10.56279/jhss.v2i1.171
James zacharia

Corresponding Author(s) : James zacharia

james.zacharia@duce.ac.tz

Journal of Humanities & Social Science (JHSS), Vol. 2 No. 1 (2013)

Abstract

The study reports on the levels and chemodynamics of pesticides and their
metabolites in soil and sediment samples from Kilombero sugarcane plantations and
environs, Morogoro Region, Tanzania. The samples were screened for 56 different
pesticide residues and their metabolites using GC-ECD and GC-NPD and the results
were confirmed by GC-MS. A total of 31 soil samples and 19 sediment samples were
analysed in this study and a total of 16 different pesticides/metabolites were detected
in soil samples; and 12 different pesticides/metabolites were detected in sediment
samples. o,p’-DDT was shown to have the highest concentration of all the detected
pesticides/metabolites in soil samples with a mean concentration of 21.04µg/kg d.w
whereas the highest concentrations of 19.64µg/kg d.w. was recorded for p,p’-DDD in
sediment samples. The other DDT metabolites detected in soil and sediment samples
were p,p’-DDT, p,p’-DDE, o,p’-DDE, p,p’-DDD and o,p’-DDD with the concentration
ranging from 2.00µg/kg to 18.3µg/kg d.w. ?-Endosulfan was detected in soil and
sediment samples at concentrations ranging from 1.09 to 13.41µg/kg d.w. whereas
endosulfan sulphate was detected with a concentration range of 2.04 – 3.48µg/kg d.w.
For HCH, only the ? and ? isomers were detected with concentrations ranging from
2.76 to 17.06µg/kg d.w. whereas aldrin and dieldrin were in the concentration range
of 1.11µg/kg to 11.20µg/kg. ?-Chlordane and parathion were detected in the
concentration range of 2.30µg/kg to 7.48µg/kg and 1.00µg/kg to 7.14µg/kg
respectively. Chloroneb and metolachlor being reported for the first time in Tanzanian
environmental samples were found to have the concentration ranging from 1.10µg/kg
d.w. to 12.83µg/kg d.w. and 3.07 to 9.41µg/kg d.w. respectively. There was a
significant difference in terms of detection frequencies and concentrations between
the dry and rainy season samples. However, the detected pesticide residues were
generally lower than the safety standards stipulated by TBS and WHO/FAO except for
aldrin, which was found to be slightly higher than the safety standards.

Keywords

Chemodynamics, Pesticides/Metabolites, Environs, Safety Standards
Levels and Chemodynamics of Pesticides in Soil and Sediments At Kilombero Sugarcane Plantations and Environs, Morogoro Region, Tanzania. (2022). Journal of Humanities & Social Science (JHSS), 2(1). https://doi.org/10.56279/jhss.v2i1.171
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Levels and Chemodynamics of Pesticides in Soil and Sediments At Kilombero Sugarcane Plantations and Environs, Morogoro Region, Tanzania. (2022). Journal of Humanities & Social Science (JHSS), 2(1). https://doi.org/10.56279/jhss.v2i1.171
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