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首页> 外文期刊>Marine pollution bulletin >Organochlorine micropollutants in the Jiulong River Estuary and Western Xiamen Sea, China
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Organochlorine micropollutants in the Jiulong River Estuary and Western Xiamen Sea, China

机译：九龙江口和厦门西海的有机氯微污染物

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摘要

Organochlorine contaminants including 12 polychlorinated biphenyl (PCB) congeners and 18 insecticides were determined in water, pore water and sediments of the Jiulong River Estuary and Western Xiamen Sea, China. The results showed that the levels of the total PCBs ranged from non-detectable to 1500ngl~(-1) in water, from 209 to 3870 ngl~(-1) in pore water, and from 2.78 to 14.8ngg~(-1) dry weight in sediments. Total organochlorine insecticide concentrations were from below the limit of detection to 2480ngl~(-1) in water, from 267 to 33400ngl~(-1) in pore water, and from 4.22 to 46.3ngg~(-1) dry weight in sediments. Concentrations of PCBs and insecticides in pore water were significantly higher than those in surface water, due to the high affinity of these hydro-phobic compounds for sediment phase. The PCB congeners with the highest concentrations were CB153, CB180 and CB194, which together accounted for 68-87% of total PCBs in water, pore water and sediment. Among the hexachlorocyclohexane (HCH) compounds, beta-HCH was found to be a major isomer. Analysis of 1,1,1-trichloro-2,2-bis-chlorophenyl-ethane (DDT) and its metabolites showed that 1,1-dichloro-2[o-chlorophenyl]-2[p-chlorophenyl]-ethylene (DDE) was dominant in the group. In comparison to a 1998 study in the Western Xiamen Sea, levels of organochlorines were enhanced due probably to recent inputs and changes in sediments.
机译：在九龙江河口和厦门西海的水，孔隙水和沉积物中测定了有机氯污染物，包括12种多氯联苯（PCB）同类物和18种杀虫剂。结果表明，水中多氯联苯的总含量从不可检测到1500ngl〜（-1），在孔隙水中为209-3870ngl〜（-1），从2.78-14.8ngg〜（-1）不等。沉积物中的干重。水中有机氯杀虫剂的总浓度从检出限以下至2480ngl〜（-1），在孔隙水中为267至33400ngl〜（-1），在沉积物中的干重为4.22至46.3ngg〜（-1）。由于这些疏水性化合物对沉淀相的高亲和力，孔隙水中的PCBs和杀虫剂的浓度明显高于地表水中的PCB和杀虫剂的浓度。最高浓度的多氯联苯同源物为CB153，CB180和CB194，它们在水，孔隙水和沉积物中总共占多氯联苯总量的68-87％。在六氯环己烷（HCH）化合物中，发现β-HCH是主要的异构体。对1,1,1-三氯-2,2-双氯苯基乙烷（DDT）及其代谢产物的分析表明，1,1-二氯-2 [邻氯苯基] -2 [对氯苯基]-乙烯（DDE ）在该组中占主导地位。与1998年在厦门西海进行的研究相比，有机氯的含量有所增加，这可能是由于近期的投入和沉积物的变化所致。

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