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中文摘要：
采用GC-MS内标法和210Pb同位素定年法探讨了黄河入海口沉积柱中有机氯农药的含量和垂直分布特征,建立了有机氯农药的沉积污染历史记录,为黄河入海口生态系统的保护提供基础数据.研究结果表明:ΣHCHs（六六六）和ΣDDTs（滴滴涕）的质量分数范围分别是0.00114.85ng·g-1和0.041.07ng·g-1.HCHs含量从1925年开始一直增加,在1961年出现峰值,随后逐渐下降,在1988年再次出现峰值.研究表明HCHs在1961年的峰值与60年代中国开始大量使用HCHs相关,在1988年的峰值与中国使用林丹的历史时间吻合.DDTs含量从1925年到50年代早期略有增加,到60年代早期急剧增加,在沉积柱的表层DDTs含量经过几次波动后大幅度减少.DDTs含量的第一峰值发生在1964年,另一个高峰值在1990年,分析表明DDTs的历史使用量影响着沉积柱中DDTs的残留量.对比中国其他区域,黄河入海口沉积物中HCHs的垂直平均含量接近太湖,略低于珠江口,但高于泉州湾和三亚湾,DDTs的垂直平均含量比珠江口、大亚湾、泉州湾、三亚湾都低.
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