The sediment content of P4-8CDD/Fs was 11.6~ 369pg/g dw, dominated by P4-8CDFs, and that of 2,3,7,8-substituted PCDD/Fs was 4.1~232.4pg/g dw.

• 表层沉积物的SP4-8CDD/Fs含量范围在11.；6~369pg/g dw；主要以P4-8CDFs为主