摘要
通过对太湖鼋头渚 2 0 0 0年采集的 2龄、3龄和 4龄夜鹭所产卵中 15种多氯联苯同系物残留状况的研究 ,发现所有样品中均检出多氯联苯 ,残留量最高的为PCB118,PCB87,PCB10 1和PCB153 ,占PCBs残留量的 75 %～ 85 % .含 5～ 6个氯原子的同系物在夜鹭卵中的PCBs残留量明显高于其它类型的同系物 .同时 ,多氯联苯残留量随亲鸟年龄增加而明显增加 .4龄卵样分别比 3龄、2龄卵样中PCBs残留量高出 4 7 5 %和 6 0 9% .统计处理结果表明 :多氯联苯残留总量与亲鸟年龄呈正相关 ( p =0 0 5 ) .PCBs总量与亲鸟年龄呈正相关 ( p =0 0 5 ) .与欧美日等国家同类研究结果中PCB153 残留量最高的情况略有不同 ,本研究在夜鹭卵中发现残留量最高的是PCB118,占PCBs残留总量的 30 %左右 ,PCB153 含量仅为PCBs残留总量的 17%左右 .
eggs of night heron ( Nycticorax nycticorax ) were collected in 2000 in Yuantouzhu of Tai lake, China. The breeding birds were divided into three groups by age, namely two, three, four years. The residues of 15 polychlorinated biphenyl congeners in eggs were studied. 15 congeners were found in all egg samples, and PCB 118 at the highest level, PCB 87 , PCB 101 and PCB 153 at second levels. Total residues of the 4 congeners occupied about 75%～85% of sum 15 congeners residues found in eggs. It was obviously that residues of congeners containing 5～6 chlorine atoms were more than others in eggs. Residues of PCBs in eggs increased with age of breeding birds. The total PCBs concentration in eggs of four years group were higher than that of three years group, two years group by 47 5% and 60 9% respectively. Different from the result of the similar studies in European countries, USA and Japan: the residue of PCB 153 is the highest, it was found that in this study the residue of PCB 118 is the highest in eggs, which is about 30% of the total PCBs residues, while the PCB 153 17% only.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2004年第2期157-161,共5页
Environmental Science
基金
国家重点基础研究发展规划项目(G19990 1181)
欧盟资助项目(EU INCO DCContractIC18 CT98 0 2 94)
所长基金项目(ISSDF0 0 2 )
关键词
生物指示
夜鹭卵
亲鸟年龄
多氯联苯
bio indication
night heron egg
breeding birds age
polychlorinated biphenyls (PCBs)
