RESIDUE LEVELS OF ORGANOCHLORINE INSECTICIDES IN THE MEDITERRANEAN WATER AND SEDIMENTS OFF THE NILE DELTA

RESIDUE LEVELS OF ORGANOCHLORINE INSECTICIDES IN THE
MEDITERRANEAN WATER AND SEDIMENTS OFF THE NILE DELTA.
M.M. ABBASj, K. EL-GENDY *, A~M. ABD-ALLA, H. ALI* , G. TANTAWY AND A.H. EL-SEBAE .
National Institute of oceanography and Fisheries,
Alexandria, Egypt.· * Faculty of Agriculture, Alexandria University.
ABSTRACT
Residues of Hexachlorocyclohexane (HCHs), DDTs,
cyclodienes groups were analyzed by capillarY gas
chromatography in wate rcolumns and sediments from off
Delta Mediterranean Sea. Cyclodienes and HCH’s constituted
most of the OC’s levels. The total OC’s values in general,
were found to be very low, and in most cases below the
detection limit. Aldrin was the most dominant coqx>nent of
the cyclodiene group while -HCH and P,P’ – DDE were the
most dominant isomers of their groupd. A notab!e decreasing
relationship is indicated between concentrations and water
depth.