| 摘要: |
| 在模拟受控条件下,利用气相色谱方法研究分析了4种酞酸酯类 化合物在龙须菜(Gracilari lemaneif ormis)-篮子鱼(Siganus oramin)食物链中的积累、分布和放大状况。结果表明,4种酞酸酯在龙须菜组织内的积累表现为:邻苯二甲酸二异辛酯(DEHP)>邻苯二甲酸二 丁酯(DBP)>邻苯二甲酸二乙酯(DEP)>邻苯二甲酸二甲酯(DMP)。侧链最长的DEHP在龙须菜藻体内的含量随暴露时间的延长呈增加 的趋势,30 d体内积累量可达2.35 mg/kg(鲜质量);侧链最短的DMP在龙须菜藻体内的质量比随时间变化差异不显著,约为0.05 mg/kg;在30 d的暴露中,4种酞酸酯DMP,DEP,DBP和DEHP在篮子鱼体内总质量比分别为0.08,0.41,1.72,3.11 mg/kg。其中DBP和DEHP在鱼内脏组织中有较高的积累和分布,分别为1.14 mg/kg和1.83 mg/kg,其次为鱼残体组织,肌肉组织中含量最低。DEHP和DBP在龙须菜和篮子鱼体不同组织中均有一定程度的富集(生物富集系数FBC均大于1)。 其中DEHP和DBP在内脏组织中的FBC值分别高达9.16和5.68,在龙须菜-篮子鱼这个简单食物链传递中DEHP和DBP在篮子鱼内脏组织中存在 放大现象。 |
| 关键词: 酞酸酯 龙须菜(Gracilari lemaneiformis) 篮子鱼(Siganus oramin) 食物链 积累与放大 |
| DOI： |
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| 基金项目:国家自然科学基金资助项目(40471118;40473046);有机地球化学国家重点实验室开放基金资助项目(OGL-200306) |
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| Bioaccumulation and biomagnification of four kinds of phathalate esters in the food chain composed of Gracilari lemaneif ormis to Siganus oramin |
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李 潇
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| Abstract: |
| The bioaccumulation and biomagnification of four kinds of phathalate esters in the food chain composed of Gracilari lemaneif ormis and Siganus oramin were investigated under man-made microcosmos condition. The results showed that the rank of bioaccumulation for four PAEs in G. lemaneif ormis was as follows: DEHP >DBP>DEP>DMP.DEHP exhibited an increasing trend with the extend of exposure time and was 2.35 mg/kg during a 30 d exposure period, no obvious change was observed for DMP in the same exposure period. The total contents of four kinds of phathalate esters in S. oramin were 0.08,0.41,1.72,3.11 mg/kg, respectively. Therewere higher contents in fish viscera for DBP(1.14 mg/kg) and DEHP(1.83 mg/kg). There existed bioaccumulation to some extent in G. lemaneif ormis and S. oramin for DEHP and DBP with 9.16 and 5.68 FBC values in fish viscera. Biomangnification phenomenon was observed in fish viscera tissue in the food chain composed of G. lemaneif ormis and S. oramin. |
| Key words: phathalate esters Gracilari lemaneif ormis Siganus oramin food chain bioaccumulation and biomagnification |
