闽江口—马祖海域表层沉积物中有机氯污染物的残留水平与分布特征  

Residue Levels and Distribution Features of Organochlorine Pollutants in the Surface Sediments of the Sea Area between Minjiang Estuary and Mazu

作　　者：陈伟琪[1] 洪华生[1] 张珞平[1] 徐立[1] 王新红[1] 洪丽玉[1] 

机构地区：[1]厦门大学海洋环境科学教育部重点实验室,厦门大学环境科学研究中心,厦门361005

出　　处：《海洋通报》2000年第2期53-58,共6页Marine Science Bulletin

摘　　要：１９９５年１０月和１９９６年４月，在闽江口至马祖海域布设８个站点，采集了表层沉积物样。样品经冷冻干燥、萃取浓缩和净化分离后，用ＧＣ法分析测定其ＨＣＨＳ。ＤＤＴＳ和ＰＣＢＳ的含量。ＨＣＨＳ、ＤＤＴＳ和ＰＣＢＳ的测定结果分别为０．０３～０．５９ｎｇ／ｇ，１．１０—１４．３ｎｇ／ｇ和ＮＤ～０．７６ｎｇ／ｇ。本文基于两个航次的调查研究，综合报道了这些有机氯污染物在调查海域表层沉积物中的含量分布，并对其残留水平、分布趋势和组成特征以及沉积物粒径的影响等作了评价与探讨。结果表明，闽江口－马祖海域基本上未受到ＨＣＨＳ和ＰＣＢＳ的污染，只受到ＤＤＴ的轻度沾污。闽江径流的输入是该海域有机氯的主要来源。Samples of surface sediment were collected at 8 stations set in the sea area between Minjiang Estuary and Mazu in Nov. 1995 and April 1996. The samples were freeze-dried, extracted, concentrated, cleaned up and fractionated, then were analyzed for HCHs, DDTs and PCBs by GC. Concentration ranges of HCHs, DDTs and PCBs are 0.03-0.59 ng/g, 1. 10- 14.3 ng /g, and ND 0.76ng/g, respectively. The concentration distributions of the organochlorine in the surface sediments of the survey area are comprehensively reported on the basis of the investigations of two cruises. The residue levels, distribution patterns and compositions of the organochlorines, as well as the influence of the grain size of sediment are also evaluated and discussed. The results indicate that the sea area between Minjiang Estuary and Mazu has not been polluted by HCHs and PCBs in the main, and is only slightly contaminated by DDTs. The inputs of the estuarine runoff of Minjiang are the main resources of the organochlorines in the sea area.

关 键 词：闽江口 马祖海域 沉积物 有机氯 含量分布 

分 类 号：P736.41[天文地球—海洋地质] X55[天文地球—海洋科学]