4种酞酸酯在龙须菜-篮子鱼食物链中的积累放大研究  

Bioaccumulation and biomagnification of four kinds of phathalate esters in the food chain composed of Gracilaria lemaneiformis to Siganus oramin

作　　者：聂湘平[1] 李桂英[1] 吴志辉[2] 李潇[2] 杨宇峰[2] 

机构地区：[1]中国科学院广州地球化学研究所有机地球化学国家重点实验室,广东广州510640 [2]暨南大学水生生物研究所,广东广州510632

出　　处：《海洋科学》2008年第1期19-23,共5页Marine Sciences

基　　金：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)

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(Gracilaria lemane-iformis)-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。The bioaccumulation and biomagnification of four kinds of phathalate esters in the food chain composed of Gracilaria lernaneifbrrnis and Siganus oramin were investigated under man-made microcosmos condition. The results showed that the rank of bioaccumulation for four PAEs in G. lemaneiformis 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. There were 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. lemaneiformis 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. lemaneiformis and S. oramin.

关 键 词：酞酸酯 龙须菜(Oracilari lemaneiformis) 篮子鱼(Siganus oramin) 食物链 积累与放大 

分 类 号：X171.5[环境科学与工程—环境科学]