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利用GC-ECD和201Pb定年技术对海南洋浦湾沉积柱中有机氯农药含量与污染历史进行了研究。结果表明,DDTS含量在(0.14~8.92)×10-9之间,HCHs含量在(0.06~1.94)×10-9之间,说明DDTS对OCPs的输入起主要贡献作用。此外洋浦湾沉积柱中的OCPs、HCHs及DDTs含量的增长及高峰段基本都反映出在相应的时段中有机氯农药输入情况。由此可知,DDTs农药可能有新的输入,HCHs可能来自陆地土壤中的残留。同时通过地球化学预警发现到2021年我国有机氯农药可逐渐消失。
The contents and pollution history of organochlorine pesticides in sediments of Yangpu Bay, Hainan Island were studied by GC-ECD and 201Pb dating techniques. The results showed that the content of DDTS was between (0.14 ~ 8.92) × 10-9 and the content of HCHs was between (0.06 ~ 1.94) × 10-9, indicating that DDTS played a major role in the input of OCPs. In addition, the increase and peak of OCPs, HCHs and DDTs content in sediments of Yangpu Bay basically reflect the input of organochlorine pesticides in the corresponding period. From this we can see that DDTs pesticides may have new inputs, HCHs may come from the land of soil residues. At the same time, it is discovered through geochemical warning that by 2021, organochlorine pesticides in China will gradually disappear.