“…Although, the widespread use of DDT as an organochlorine pesticide has been banned in many countries since the 1970's, its residues are still detected in many aquatic samples gathered in many different regions of the world (Eisenberg and Topping, 1985;Teran and Sierra, 1986;Ober et al, 1987). Sewage * Corresponding Author 15 Downloaded by [Northeastern University] at 12:19 03 January 2015 effluent is considered as the major source of organochlorine pollutants to the coastal waters, where DDT was recorded as one of the highest concentrations found in aquatic biota living around sewage outfall (Mearns, 1981;Swartz et al, 1985;Miskiewicz and Gibbs, 1994) Direct partitioning or adsorption of these organochlorine pollutants in the aqueous medium plays a major role in the uptake of lipophilic compounds by the lower level of small aquatic organisms, mainly plankton, because of the relatively higher biomass in the smaller sizes (Bruggeman et al, 1984;Harding, 1986;Opperhuizen and Stokkel, 1988;Hoke et al, 1994).…”