Vertical distributions of persistent organic pollutants (POPs) caused from organochlorine pesticides in a sediment core taken from Ariake bay, Japan.
Vertical distributions of persistent organic pollutants (POPs) caused from organochlorine pesticides in a sediment core taken from Ariake bay, Japan.
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DOI：
10.1016/j.chemosphere.2006.09.063
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发表时间：
2007-03
期刊：
影响因子：
8.8
通讯作者：
Yun-Seok Kim;H. Eun;T. Katase;H. Fujiwara
中科院分区：
文献类型：
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作者：
Yun-Seok Kim;H. Eun;T. Katase;H. Fujiwara
分析了日本有明湾沉积物柱样中有机氯农药的持久性有机污染物（POPs），包括二氯二苯三氯乙烷（DDTs）及其代谢物、六氯苯（HCB）、七氯、氯代烃类化合物（CHLs）、艾氏剂、狄氏剂、异狄氏剂、灭蚁灵和六氯环己烷异构体（HCHs）。虽然筑后川在有明湾的流量最大，但在矢部川河口St.3发现了表层沉积物中持久性有机污染物的总浓度，该浓度水平是筑后川河口St.1的两倍。可以认为，潜在的持久性有机污染物的污染源是相对接近本研究区。1967 - 1970年期间，沉积物芯样中六氯苯、六氯环己烷和滴滴涕的残留水平相对较高。在这一层中，有明湾沉积物岩心中的六氯苯浓度最高，为2.6ngg-1干重，高于东京湾，随后在更深的沉积物岩心中检测到。表层沉积物（0-2cm）中（DDD+DDE）/DDTs比值较高。尽管表层沉积物中存在一定浓度的滴滴涕，但最近人们注意到，滴滴涕的排放并没有造成滴滴涕的直接输入。上层沉积物柱样中HCH的来源可能是工业级HCH扩散后在环境中的长期积累。此外，CHLs，狄氏剂和七氯的浓度检测和最近增加的沉积物芯。根据1960年代早期五氯苯酚污染的可能性，反映了有明湾沉积物岩心中的持久性有机污染物。
Persistent organic pollutants (POPs) of organochlorine pesticides such as dichlorodiphenyl trichloroethane (DDTs) and its metabolites, hexachlorobenzene (HCB), heptachlor, chlordane compounds (CHLs), aldrin, dieldrin, endrin, mirex and isomers of hexachlorocyclohexane (HCHs), were analyzed in sediment cores collected from Ariake Bay, Japan. Although Chikugo River has the largest flow in Ariake Bay, the total concentration of POPs in surface sediment was found in St.3, mouth of the Yabe River, where that level was two times higher than St.1, mouth of the Chikugo River. It could be assumed that the potential source of POPs contamination is relatively close to this study area. Relatively high residue levels of HCB, HCHs and DDTs in sediment core were found during the period from 1967 to 1970. In this layer, the HCB concentration investigated in sediment cores of Ariake Bay was maximum, 2.6ngg−1dry weight and higher than that of Tokyo Bay and subsequently detected in deeper sediment cores. The ratio of (DDD+DDE)/ΣDDTs was high in top sediments (0–2cm). Although there was a concentration of DDTs in the top sediment, it was noticed that DDT emission did not cause direct input of DDT recently. The HCHs determined in upper sediment cores might be originated from long-range accumulation in environment after dispersing of technical-grade HCH. Moreover, the CHLs, dieldrin and heptachlor concentrations were detected and recently increased in sediment core. POPs in sediment cores of Ariake Bay based on the possibility of PCP contamination during the early 1960s were reflected.