基于静态模型的五种苯系物在海水和厚壳贻贝中的消除规律

Elimination patterns of five benzene derivatives in seawater and Mytilus coruscus based on static models

对静态模型中的苯(BZ)、甲苯(TU)、对二甲苯(PX)、邻二甲苯(MX)和间二甲苯(OX)5种苯系物在海水和厚壳贻贝(Mytilus coruscus)中的消除规律进行研究,在(20±0.5)℃环境温度下,以海水和厚壳贻贝为研究对象,分别添加一定浓度的5种苯系物,用顶空进样-气相色谱氢火焰离子化检测器法(HS-GCFID)分析不同时间点的5种苯系物在海水和厚壳贻贝中的残留浓度。结果表明,海水和厚壳贻贝中苯系物各组分浓度随时间变化规律基本相同,海水中5种苯系物的消除速率由大到小依次为MX、PX、TU、BZ、OX,厚壳贻贝中5种苯系物的消除速率由大到小依次为TU、BZ、MX、OX、PX,厚壳贻贝与海水的消除速率不同,其原因可能是厚壳贻贝富含脂肪、蛋白质等复杂基质,苯系物与厚壳贻贝基质的结合程度较强。

The elimination laws of five benzene derivatives,namely benzene(BZ),toluene(TU),p-xylene(PX),o-xylene(MX),and m-xylene(OX),in seawater and Mytilus coruscus were studied in a static model.Five benzene derivatives with certain concentra⁃tions were added to seawater and Mytilus coruscus at an ambient temperature of(20±0.5)℃,the residual concentrations of five ben⁃zene derivatives in seawater and Mytilus coruscus were analyzed at different time points using the headspace injection gas chromatogra⁃phy hydrogen flame ionization detector(HS-GC-FID)method.The results showed that the concentration changes of each component of benzene series in seawater and Mytilus coruscus were basically the same over time.The elimination rates of the five benzene series in seawater were MX,PX,TU,BZ and OX in descending order,while the elimination rates of the five benzene series in Mytilus coruscus were TU,BZ,MX,OX and PX in descending order.The elimination rates of Mytilus coruscus and seawater were different,possibly due to the complex matrix such as fat and protein rich in Mytilus coruscus.The binding degree between benzene derivatives and Mytilus coruscus mussel matrix was strong.