Detection and Movement of Dichlorodiphenyl Trichloroethane (DDT) Residues in Soil Pedons at Different Locations of Dhaka City in Bangladesh

Zaman, M. A.; Ullah, S. M.; Chowdhury, M. A. Z.; Mridha, M. A. U.
March 2007
World Journal of Agricultural Sciences;Mar2007, Vol. 3 Issue 2, p145
Academic Journal
Soil samples were collected at different depths of soil pedons from five locations of Dhaka city to study the DDT residues using ELISA (Enzymed-Linked Immuno Sorbent Assay) method during pre-monsoon transition and rainy seasons. The result showed that surface layers of all pedons contain DDT while all the selected depths of two pedons at Taltala and Hazaribag were contaminated with DDT. The unaltered plough pan was found to resist the downward movement of DDT in the cultivated lands at Aminbazar, Vaturia and Ainkha, whereas at Hazaribag the leaching of DDT through soil profile occurred without any resistance along with water soluble fat rather than organic matter and clay. In Taltala, DDT moved downward by organic matter and soil colloid within the cracked plough layer during dry fallow period. Correlation between DDT and some physico-chemical properties of Taltala and Hazaribag soils showed that positive relationships of DDT with clay and organic carbon occurred at significant levels, although a negative correlation was found between DDT and sand of Taltala soil. No significant relations of DDT with silt, moisture, pH, total nitrogen and cation exchange capacity were found in the tested soils.


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