杭州湾底泥得克隆污染状况及来源的初步研究

doi:10.3969/j.issn.1001-909X.2014.02.007

摘要/Abstract

摘要： 随着含溴阻燃剂的进一步限用或禁用,氯代阻燃剂得克隆(Dechlorane Plus, DP)以其良好的热稳定性和电化学性能成为推荐的替代品之一。作为添加型氯代阻燃剂,DP很容易从产品中脱落而成为环境中广泛存在的污染物,但相关的研究仍十分匮乏。本研究测定了杭州湾海域4个底泥柱状样品中DP的残留及异构体特征,并对DP在该海域底泥中的时空分布和可能来源进行了初步分析。结果表明,syn-DP和anti-DP在底泥样品中的含量分别为BDL~17.7 pg/g干质量(平均为2.9±3.2 pg/g干质量)和1.4~38.1 pg/g 干质量(平均为8.0±8.5 pg/g干质量),其污染程度相对全球范围处于较低水平。空间分布表明金山工业区可能对杭州湾DP的污染有一定贡献,DP在柱状底泥中的垂直分布未发现明显变化趋势。本研究中DP的f_syn平均值为0.25~0.28,表明研究海域底泥中的DP可能来自于远距离传输。

关键词: 得克隆, 杭州湾, 底泥

Abstract: Due to the bans or restrictions of brominated flame retardants all over the world, Dechlorane Plus (DP) has been considered as one of the recommended substitutes. However, as an additive, DP has a tendency to escape from the products and become an environmental contaminant, while limited information relevant to DP pollution in the environment has been reported. Residues and isomeric compositions of DP in four sediment cores from Hangzhou Bay, China were tested in the present study. The results show that the content levels of syn-DP and anti-DP, the two isomers of DP, vary from BDL~17.7 pg/g.dw(mean 2.9±3.2 pg/g.dw) and 1.4~38.1 pg/g.dw(mean 8.0±8.5 pg/g.dw), respectively, which are within the low level globally. Obvious differences exist between the DP levels of core 1 and the other 3 sediment cores, implying an additional contribution of DP pollution from the Jinshan Industrial Zone. However, the contents of DP vary little with depth. Moreover, the average f_syn values of DP are in the range of 0.25~0.28, suggesting that DP in Hangzhou Bay primarily originates from the long-distance transportation.

Key words: Dechlorane Plus, Hangzhou Bay, sediment

中图分类号:

周珊珊, 汤巧智. 杭州湾底泥得克隆污染状况及来源的初步研究[J]. 海洋学研究, 2014, 32(2): 53-58.

ZHOU Shan-shan, TANG Qiao-zhi. Residues and sources of chlorinated flame retardant Dechlorane Plus in sediment from Hangzhou Bay, China[J]. Journal of Marine Sciences, 2014, 32(2): 53-58.

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