摘要
作为建立淡水"贝类观察"体系的初步尝试,本研究以2003—2005年间采自太湖5个地点:无锡五里湖和三山岛,浙江湖州,常州雪堰,宜兴大浦的背角无齿蚌(Anodontawoodiana)为对象,测定了其体内37种多氯联苯(PCBs)化合物的浓度。结果显示,大部分样本能够明显检出PCB残留,检出率为95%。总多氯联苯(ΣPCB)含量在0.68-58.09ng·g-1湿重之间。各样点间蚌的总PCB含量无明显差异。PCB11、1和5在大多数样本中为优势组分,太湖周围的工业污染可能是其主要来源;同时,其累积类型异于所报道的太湖水域的夜鹭卵、沉积物和其他样本的研究结果。本研究中背角无齿蚌的PCBs残留量低于国内外相关的食品卫生标准。
“Mussel Watch”has been proven successful as a very applicable approach to monitor the status and temporal changes in organochlorine pollutants using marine bivalve mussels as sentinel organisms. However, few studies are available on monitoring of freshwater pollution with bivalves so far. As a part of the pilot study on “Freshwater Mussel Watch”, a total of 37 polychlorinated biphenyl （PCB） congeners were analyzed by an Agilent 6890N gas chromatography, equipped with 63Ni electron capture detector, in soft tissues of 40 bivalves A nodonta woodiana collected in 2003-2005 at five sites around the Taihu Lake, i.e., Wulihu and Sanshandao （Wuxi city）, Huzhou city, Xueyan （Changzhou city）, and Dapu （Yixing city）. Residues of PCBs were evidently found in the bivalves with a detection rate of 95%. Total PCBs residue levels ranged in the mussels from 0.68 to 58.09 ng·g^-1 wet weight and no significant difference of total PCBs existed among the five sites. PCB congener 1, 5 and 11 dominated in most of the bivalves, suggesting surrounding industrial emission might be a main possible source of PCB. PCB bioaccumulation pattern in the bivalves was quite distinct from that in eggs of night heron, sediments, and other sub- stances of previous literatures. The residue levels of total PCBs in the bivalves were lower than the corresponding Food Maximum Residue Limits of FDA and Ministry of Health of China.
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2008年第2期767-772,共6页
Journal of Agro-Environment Science
基金
江苏省科技项目(自然科学基金BK2006030)
中央级公益性科研院所基本科研业务费专项资金项目(6-115043)
农业部渔业生态环境重点开放实验室开放基金课题(2004-4)
关键词
背角无齿蚌
多氯联苯
太湖
残留
生物积累
A nodonta woodiana
polychlorinated biphenyl （PCB）
Taihu Lake
residue
bioaccumulation
