Concentrations of PAHs in sediment of

Table 2 shows the compositions of PAHs in water, SPM and Ginsenoside Rb1 of sampling sites in Hong Kong and PRD. It was obvious that 2, 3-ring PAHs (naphthalene (Nap), acenaphthylene (Acel), acenaphthene (Ace), fluorene (Fl), phenanthrene (Phe), andanthracene (An)) were the most abundant congeners in the environmental samples, especially in SPM (mean 88.4%, range 69.6–94.5%) and pond sediment of the experimental sites (mean 94.8%, 92.9–95.2%). 4-ring PAHs (fluoranthene (FlA), pyrene (Py), benz(a)anthracene (BaA) and chrysene (Chry)) also showed higher abundances in water of the experiment sites (mean 38.4%, range 30.8–47.2%) and sediment in reference fish ponds (mean 25.9%, range 17.9–31.7%), while 5,6-ring (benzo(a)pyrene (BaP), benzo(b)fluoranthene (BbF), benzo(k)fluoranthene (BkF), indeno(1,2,3-cd)pyrene (IP), dibenz(a,h)anthracene (DahA) and benzo(g,h,i)perylene (BghiP)) in environmental samples of reference fish ponds were higher than that of experimental sites.