摘要
本文于１９９５年７月在东经１１３°００′００″～１１３°５８′００″，北纬２２０°００′００″～２２°４４′００″的珠江口区采集海水、表层沉积物、气溶胶和海洋生物。用气相色谱法测定研究样品中ＢＨＣ和ＤＤＴ的含量与不同区域的分布。结果表明，就其平均值而言，表层海水ＢＨＣ含量为０．０４５μｇ／ｄｍ３，ＤＤＴ为０．０４１μｇ／ｄｍ３；底层海水ＢＨＣ含量为０．０４８μｇ／ｄｍ３，ＤＤＴ为０．０３５μｇ／ｄｍ３。沉积物ＢＨＣ为１１．０７×１０－９·干；ＤＤＴ为１７．８８×１０－９·干。气溶胶ＢＨＣ为０．１３６ｎｇ／ｍ３；ＤＤＴ为０．０７８ｎｇ／ｍ３。海洋生物ＢＨＣ的范围为０．４０３×１０－９·鲜（海带）～８．６４４×１０－９·鲜（贻贝）；ＤＤＴ为１．７７０×１０－９·鲜（浮游植物）～２０７．６×１０－９·鲜（海鸟）。在雨季，海水中ＢＨＣ和ＤＤＴ由于受到珠江径流的稀释而含量偏低；ＢＨＣ、ＤＤＴ在表层海水及表层沉积物的区域分布，雨季和旱季类似。ＢＨＣ和ＤＤＴ在海洋生物中的含量，随着海洋食物链成员生物营养级的提高而提高。它们在不可食部分的含量高于可食部分，海鸟的羽毛是积累ＢＨＣ和ＤＤＴ的关键器官。
In July 1995 the sea water,surface sediment,aerosol and marine organisms were collected in the east longitude 113°00′00″～113°58′00″,north latitude 22°00′00″～22°44′00″of Zhujiang Estuary,China.The content and the distribution of BHC and DDT in different area were detected and studied by G C. The result showed that as far as average was concerned,the content of BHC was 0.045 μg/dm3 and DDT was 0.041 μg/dm3 in the surface sea water; the content of BHC was 0.048 μg/dm3,DDT was 0.035 μg/dm3 in the bottom sea water.The content of BHC was 11.07×10-9·dry;DDT was 17.88×10-9·dry in the surface sediment.The content of BHC was 0.136 ng/dm3,DDT was 0.078 ng/dm3 in the aerosol.The content range of BHC was 0.403×10-9·fresh(Laminarian) to 8.644×10-9·fresh(mussel);DDT was 1.770×10-9·fresh(Phytoplankton) to 207.6×10-9·fresh(Sea bird).As far as behaviour character was concerned;the content of BHC and DDT in the sea water was lower due to it was diluted by the runoff of the Zhujiang River in the rain season;between rain season and dry season,the distribution of BHC and DDT in the surface sea water and surface sediment was similar.With nutritious grade rising,the accumulation of BHC and DDT in the marine organisms was higher.The distribution of BHC and DDT in eatable part was higher than uneatable part.The feather of the sea bird is a key organ to accumulate BHC and DDT.
出处
《海洋环境科学》
CAS
CSCD
北大核心
1998年第2期1-7,共7页
Marine Environmental Science
基金
FAD.IAEA的赞助
