Effects of the polychaetes Nereis diversicolor and Arenicola marina on the fate and distribution of Pyrene in sediments

摘要

Effects of the polychaetes Nereis diversicolor and Arenicola marina on the distribution, metabolism and removal of[~14C-4,5,9,10]-pyrene in sediment mirocosms were studied over 42 and 53 d, respectively. unmetabolized pyrene, water-and organic-soluble pyrene metabolites were quantified in sediment, interstitial water and overlying water, and ~14CO_2 production was also assessed. Both N.diversicolor and A.marina enhanced fluxes of sediment-associated pyrene and metabolites into overlying water but to different extents. The major pathway of pyrene removal from sediments with N.diversicolor was release of water-soluble metabolites, probably formed by meta- bolism in N.diversicolor.