2003~2005年和1991~1993年广东沿海牡蛎体六六六和滴滴涕残留比较

被引:16
作者
甘居利
贾晓平
林钦
蔡文贵
机构
[1] 农业部渔业生态环境重点开放实验室,广东省渔业生态环境重点实验室,中国水产科学研究院南海水产研究所
基金
广东省科技计划;
关键词
牡蛎; 六六六; 滴滴涕; 地理分布; 变化趋势;
D O I
暂无
中图分类号
X592 [农用化学物质、有毒化学物质污染及其防治];
学科分类号
082803 ;
摘要
于2003~2005年的每年春季,在广东沿岸10个海湾,每个海湾采集近江牡蛎(Crassostrea rivularis)成体30只,测定其中六六六(BHCs)和滴滴涕(DDTs)的含量。结果显示,2003~2005年近江牡蛎体中DDTs平均含量是68.7ng/g(干重),为1991~1993年的5.54倍。样品中DDTs年平均含量在2003~2005年快速增加,但在1991~1993年前是缓慢减少。2003~2005年DDE/DDTs含量比为12.8%39.1%,比12年前的45%55%明显更低。2003~2005年牡蛎样品中BHCs平均含量是3.27ng/g(干重),仅相当于1991~1993年的16%。样品中BHCs年平均含量在2003~2005年持续降低,降速比1991~1993年缓慢。2003~2005年γ-BHC/BHCs平均含量比为19.6%,低于12年前的26%。样品中BHCs、DDTs区域平均含量由高到低依次为粤东沿岸、珠江口、粤西沿岸/粤东沿岸、粤西沿岸、珠江口,与12年前的区域分布格局相同。本研究采集的牡蛎样品中,BHCs、DDTs含量范围分别是未检出1.21μg·kg-1和0.11~76.3μg·kg-1(湿重),均低于中国和欧美的最低残留限量(湿重)。
引用
收藏
页码:652 / 658
页数:7
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