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用高分辨率气相色谱-质谱方法对青岛胶州湾内外表层沉积物、柱状岩心及贻贝样品中的17种毒性多氯代二苯并二 /呋喃(PCDD/Fs)进行了分析和讨论.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.S2,3,7,8-PCDD/Fs含量范围4.1~232.4pg/g dw.在环流作用下沉积物中形成了明显的东-西分布格局.除河口处外,PCDD/F同系物分布基本上相同,即低氯代PCDD/Fs占主导.SP4-8CDD/Fs沉积通量从1951年起逐渐增大,STEQ沉积通量从1980年显著增大.青岛近海PCDD/Fs的来源相对恒定,推测为城市污水污泥和大气沉降.贝肉中S2,3,7,8-PCDD/Fs为2.9~5.1pg/g dw. TEQ的主要来源为2,3,4,7,8-PeCDF(35%)、2,3,7,8-TCDF(30%)、2,3,7,8,-TCDD(30%).
Seventeen toxic PCDD / Fs in surface sediments, column cores and mussel samples in and around the Jiaozhou Bay, Qingdao were analyzed and discussed by high resolution gas chromatography-mass spectrometry The content of SP4-8CDD / Fs in sediments ranged from 11.6 to 369 pg / g dw, mainly in P4-8CDFs. The content of S2,3,7,8-PCDD / Fs ranged from 4.1 to 232.4 pg / g dw. The distribution of PCDD / F homologues is basically the same except for the estuary, which is dominated by low-chlorinated PCDD / Fs. The deposition flux of SP4-8CDD / Fs from 1951 And the STEQ sediment flux increased significantly from 1980. The source of PCDD / Fs in offshore Qingdao was relatively constant, which was presumed to be urban sewage sludge and atmospheric deposition.S2,3,7,8-PCDD / Fs Was 2.9-5.1pg / g dw.The main sources of TEQ were 2,3,4,7,8-PeCDF (35%), 2,3,7,8-TCDF (30%), 2,3,7,8- 8, -TCDD (30%).