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青岛近岸沉积物中持久性有机污染物多氯萘和多溴联苯醚 被引量:77

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摘要 对同一样品经索氏抽提、多级复合硅胶层析柱、渗透凝胶层析柱、氧化铝层析柱分离,利用低分辨率气相色谱-质谱方法对青岛近岸5个表层沉积物和1个贝类样品中的31种多氯萘(PCNs)和21种多溴联苯醚(PBDEs)异构体的含量分布特征、毒性当量浓度及来源进行了研究.总PCNs和PBDEs最高含量出现在河口处.总PCNs含量范围为212~1209 Pg/g(dw),以3氯代PCNs为主.总PBDEs含量范围为117~5510 Pg/g(dw).主要以6-氯以下(含6-氯)为主.局部来源的PCNs来自垃圾焚烧、燃煤等高温过程.PBDEs则主要来自分子扩散.除了在河口处受到城市污水污泥的影响之外,大气沉降是青岛近海PCNs与PBDEs的重要来源.青岛近岸贻贝中PCNs和PBDEs都相对于沉积物有富集作用.PCNs的总毒性当量浓度均低于PCBs总毒性当量浓度.
出处 《科学通报》 EI CAS CSCD 北大核心 2003年第21期2244-2251,共8页 Chinese Science Bulletin
基金 山东省自然科学基金重点项目(批准号:Z99E03) 国家教委留学回国人员起动基金资助项目.
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