厦门港湾沉积物中有机氯农药和多氯联苯的垂直分布特征

VERTICAL DISTRIBUTION CHARACTERISTICS OF ORGANOCHLORINATED PESTICIDES AND POLYCHLORINATED BIPHENYLS IN SEDIMENTS OF XIAMEN BAY

从厦门港海区采集两根沉积物柱样，研究有机氯农药六六六（ＨＣＨｓ）、滴 滴涕（ＤＤＴｓ）和多氯联苯（ＰＣＢｓ）在沉积物中的垂直分布。ＨＣＨｓ、ＤＤＴｓ及ＰＣＢｓ含量 用ＧＣ法测定。取自厦门港湾口的１号柱样ＨＣＨｓ、ＤＤＴｓ和ＰＣＢｓ的含量范围分别 为０．１２～０．３２ｎｇ／ｇ，４．６４～１０．５ｎｇ／ｇ和０．０９～０．４６ｎｇ／ｇ；取自厦门西港内湾的５ 号柱样分别为０．１７～０．３１ｎｇ／ｇ，３．６５～１５９ｎｇ／ｇ和０．１９～７２．７ｎｇ／ｇ。垂直分布特征 表明，湾口沉积物未受到这些有机氯化合物的明显污染，而西港内湾曾于 ８０年代 末至 ９０年代初受到 ＰＣＢｓ的中度污染，且近期仍有较强的 ＤＤＴ污染源输入。

Two sediment cores collected from Xiamen Bay were studied on the vertical distributions of organochlorinated pesticides (HCHs and DDTs) and polychlorinated biphenyls (PCBs) in the sediments. The concentrations of HCHs, DDTs and PCBs were determined by gas chromatography (GC). Concentration ranges of HCHs, DDTs and PCBs in No. 1 core, collected at the inlet of Xiamen Bay, were 0. 12-0. 32 ng/g, 4. 64-10. 5ng/g and 0. 09-0. 46ng/g, respectively; those for No. 5 core, collected at the inner of Xiamen Western Bay, were 0.17-0. 31 ng/g , 3. 65-159ng/g and 0. 19-72. 7 ng/g, respectively. The vertical distribution characteristics indicated that the sediment at inlet of Xiamen Bay had not been evidently polluted by these organochlorine compounds, but the inner of Xiamen Western Bay was moderately polluted by PCBs in 1989-1990 and input DDT into the inner of Xiamen Western Bay is still in existence.