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Persistence of endosulfan in selected areas of Kasaragod district, Kerala
The persistence of organochlorine pesticides in differ- ent environmental matrices is a matter of concern as the complete environmental fate of these chemicals is still an unexplored field. Water, soil and sediment samples were collected from selected panchayats of Kasaragod district, Kerala in four...
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| Formato: | Printed Book |
| Publicado em: |
CURRENT SCIENCE,
2014
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| Acesso em linha: | http://10.26.1.76/ks/005393.pdf |
| Resumo: | The persistence of organochlorine pesticides in differ-
ent environmental matrices is a matter of concern as
the complete environmental fate of these chemicals is
still an unexplored field. Water, soil and sediment
samples were collected from selected panchayats of
Kasaragod district, Kerala in four different phases to
assess the contamination by endosulfan applied on
cashew plantations. Endosulfan was detected in only 2
samples out of 22 water samples analysed during the
second phase of sampling. Concentration of endosul-
fan was below detection limit in all the 22 samples
analysed during the third phase. A total of 14 sedi-
ment samples were analysed and during the third
phase, the concentration of endosulfan was below
detection limit in all the samples. Out of 13 soil sam-
ples, endosulfan was detected in 5 samples during the
second phase and during the third phase it was
detected in 3 samples. Endosulfan was detected in two
soil samples from Panathadi and Muliyar Panchayats
during the fourth phase. Also, comparison of results
of the analysis of endosulfan during the third and
fourth phase showed decrease in concentration in the
three soil samples. The findings from the present
study provide information on the current residue lev-
els and persistence of organochlorine pesticide endo-
sulfan in water, sediment and soil in selected areas of
Kasaragod district. The study shows that combined
toxic residues of endosulfan in the sediment and soil
samples of selected areas of Kasaragod district were
found to be persistent for a period of 1.5–2 years, but
the persistence showed variations depending upon the
climatic conditions and physico-chemical characteris-
tics like pH, organic matter content and particle size
of the soil in the area. |
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| Descrição Física: | VOL. 106, NO. 10, 25 MAY 2014 |