RESIDUE LEVELS OF CHLORINATED HYDROCARBONS COMPOUNDS IN FISH FROM EL-MAX BAY AND MARYUT LAKE, ALEXANDRIA, EGYPT

Residues of organochlorine compounds and polychlorinated biphenyls (PC Bs) were analyzed by capillary gas chromatography in fish species from El-Max Bay and Maryut Lake. The values of Grand Total (GT), and Extra ctable Organic Matter (EOM) were reported in this study. The results r evealed an increase in chlorinated hydrocarbons with increase in body size and fat content. Sigma DDTs and PCBs were the most predominant co ntaminants occurring in the muscle tissue of fish samples. Remarkable variations in the concentrations of PCBs components were noted among t he species. The concentrations of Aroclors in all fish samples were hi gher than that of organochlorine compounds (OCs) this result indicatin g by reviewing to Goldberg Index (GI) a predominance of industrial act ivities over agricultural activities as the source of contamination of the marine environment. Elevated PCBs concentrations were observed in muscle tissue of Sphyraena Sphyraena and Sardina Pilchardus from El-M ax Bay and two Tilapia sp. from Maryut Lake. Also variations were foun d in the relative proportions of p,p'-, and o,p- of DDT, DDD, DDE and p,p'-TDE in all fish samples. However, through HCHs group, alpha and d elta-HCH were detected in trace amount in compare with gamma-HCH. Aroc lor 1248 is the dominant compared with Aroclor 1254 and Aroclor 1260. Individual PCB congeners were also determined. Congeners 101, 138 and 153 were the most dominants congener compared to the remained studied congeners.