Dang D N, Nguyen M A, Carvalho F P, Villeneuve J P, Cattini C
Vietnam Atomic Energy Commission, Hanoi, Vietnam.
Sci Total Environ. 1999 Sep 30;237-238:363-71. doi: 10.1016/s0048-9697(99)00149-7.
Organochlorine pesticides and polychlorinated biphenyls (PCBs) were determined in sediments and clams collected from the coast of the north of Vietnam during the rainy season (August-September 1997). Results show that the organochlorine pesticides of major concern are HCHs (1.2-33.7 ng g-1 dry wt.), DDTs (6.2-10.4 ng g-1 dry wt.) and HCB (0.1-6.5 ng g-1 dry wt.). PCBs, in aroclor 1254 equivalents, were also generally present in concentrations ranging from 0.47 to 28.1 ng g-1 sediment dry wt. Concentrations measured in the soft tissues of clams (Meretrix meretrix) generally reflect the level of contamination at the sampling sites. In the clams, the concentrations of DDTs (12.0-23.3 ng g-1 dry wt.) and PCBs (5.1-25.3 ng g-1 dry wt.) were generally higher than those of other chlorinated hydrocarbons. These results underscore the need to improved environmental protection measures in order to reduce the exposure of the population to these persistent and bioaccumulative compounds through food ingestion.
在雨季（1997年8月至9月）期间，对从越南北部海岸采集的沉积物和蛤类中的有机氯农药和多氯联苯（PCBs）进行了测定。结果表明，主要关注的有机氯农药为六氯环己烷（HCHs，干重1.2 - 33.7 ng g-1）、滴滴涕（DDTs，干重6.2 - 10.4 ng g-1）和六氯苯（HCB，干重0.1 - 6.5 ng g-1）。以氯丹1254当量计的多氯联苯，沉积物干重中的浓度范围通常为0.47至28.1 ng g-1。在蛤类（文蛤）软组织中测得的浓度通常反映了采样点的污染水平。在蛤类中，滴滴涕（干重12.0 - 23.3 ng g-1）和多氯联苯（干重5.1 - 25.3 ng g-1）的浓度通常高于其他氯代烃类。这些结果强调需要改进环境保护措施，以减少人群通过食物摄入接触这些持久性和生物累积性化合物的情况。
