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从东海陆架区采集几组不受扰动的岩芯柱样,研究了有机氯杀虫剂BHC、DDT在东海陆架区的污染历史,表明BHC、DDT在本区的污染水平呈波动变化,约8—10年左右出现一个污染高峰。文中同时介绍了在不同时间尺度上估算水-沉积物界面上BHC、DDT沉积输入通量的两种较为简便的估算模式,并估算得1980—1981年间它们的沉积通量分别为1.3×10~(-5)—19×10~(-5)g/(m~2·a)和8.4×10~(-5)—74×10~(-5)g/(m~2·a)之间;而自BHC、DDT大量使用以来近40年间,在本陆架区的年均输入通量分别为5.18×10~(-5)—7.70×10~(-5)g/(m~2·a)和11.5×10~(-5)—21.0×10~(-5)g/(m~2·a)之间。
A series of uncorrupted cores were collected from the East China Sea shelf area to study the pollution history of BHC and DDT in the East China Sea shelf area. The results show that the pollution levels of BHC and DDT in this area fluctuate about 8 A peak of pollution appears in about 10 years. In the meantime, two simple calculation models for estimating the input fluxes of BHC and DDT deposition on the water-sediment interface at different time scales are also introduced. The sedimentation fluxes of the BHC and DDT deposition fluxes at the water-sediment interface are estimated to be 1.3 × 10 ~ (-5) -19 × 10 -5 g / (m 2 · a) and 8.4 × 10 -5 -574 × 10 -5 g / (m 2 · a) In the past 40 years since the BHC and DDT were used in large quantities, the annual average input flux in the continental shelf region was 5.18 × 10 -5 -7.70 × 10 -5 g / (m 2 · a) and 11.5 × 10 ~ (-5) -21.0 × 10 -5 g / (m ~ 2 · a).