作　　者： ; ; ; ; ; ; ; ; ; ; ; (沈伟然）; (秦宝平）; (孙韧）; (张文具）;

机构地区： 北京大学城市与环境学院地表过程分析与模拟教育部重点实验室

出　　处： 《农业环境科学学报》 2004年第2期368-371,共4页

摘　　要： 在天津郊区选择2处代表性鱼塘,采集了水、悬浮物、沉积物、鲫鱼和鲢鱼样品,测定了各种样品中的六六六含量,发现六六六在各相中均有较高残留。水相、悬浮物和沉积物中六六六平均浓度分别为19.2ng·L-1,1160.5ng·g-1和8.4ng·g-1。两鱼塘相差2～10倍。鱼塘各相六六六含量与周边土壤状况密切相关。各相六六六含量高的鱼塘位于农业土壤遭受严重污染的地区。污染严重的鱼塘中鱼体六六六富集量也大大高于相对浓度较低的鱼塘。采自两鱼塘的鱼的肌肉中平均六六六含量分别为71.4ng·g-1和19.7ng·g-1。以水相浓度为基准的生物富集系数分别为2.06×103和5.36×103。肝胰脏、肠、鳃、卵巢等器官都富集了更高浓度的六六六。 Hexachlorocyclohexanes (HCHs) were measured in water, suspended solids (SS), sediment, and fish (Carassius auratus and Hypophthalmichthys molitrix) samples collected from two typical fishponds of Tianjin suburbs. HCHs contamination was severe for all of the media. Mean concentrations of HCHs in water, SS and sediment were 19.2 ng· L- 1, 1 160.5 ng· g- 1, 8.4 ng· g- 1 respectively, which varied with fishponds and the differences between the two fishponds reached 2～ 10 times. The levels of fishpond contamination significantly correlated to those of the surrounding soil. HCHs concentrations of various media were much higher in the fishpond located in an area with severe HCHs contamination of agricultural soil than the pond sit in an area with less soil contamination. The average HCHs concentrations in the fish muscles were 71.4 ng· g- 1 and 19.7 ng· g- 1 and the bioconcentration factors (BCF) based on water concentrations were 2.06× 103 and 5.36× 103 respectively in these two fishponds. In addition, livers, pancreas, intestines, gills and ovaries of fish concentrated higher amounts of HCHs.

关 键 词： 天津地区 鱼塘 残留 有机污染物 生态系统

领　　域： [环境科学与工程] [环境科学与工程]