Fate of 14C‐lindane in a rice‐fish model ecosystem* |
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Authors: | I Y Mostafa Abla Ezz El‐Arab S M A D Zayed |
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Institution: | Middle Eastern Regional Radioisotope Centre for the Arab Countries , Dokki, Cairo, Egypt |
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Abstract: | Abstract A model ecosystem has been used to evaluate the impact of 14C‐lindane on rice‐fish agricultural system. The distribution of 14C‐residues among the constituents of the model ecosystem was studied over a period of 90 days. The insecticide was found to be readily absorbed by the roots and translocated to all parts of the rice plant. The peak level in the shoots (26 ppm) and roots (105 ppm) of plants was reached to within three weeks. Lindane was concentrated in fish and residues as high as 90 ppm could be detected after 30 days. The major part of the residues present in the different constituents of the ecosystem could be extracted with hexane and proved to contain soley the parent compound. The data obtained show that lindane possesses a relatively low biodegradability in fish and in rice plant. The insecticide accumulates in fish and rice plant to considerable extent. |
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Keywords: | Insecticides 14C‐Lindane Rice‐Fish Ecosystem Effect |
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