Department of Environmental Engineering, Kocaeli University, 41380, Kocaeli, Turkey.
Environ Sci Pollut Res Int. 2013 Sep;20(9):6611-9. doi: 10.1007/s11356-013-1713-y. Epub 2013 Apr 24.
This study evaluates PCDD/F pollution in the surface sediments of Izmit Bay (Turkey) and assesses the possible sources of PCDD/F inputs to the bay. The results showed that concentrations of toxic PCDD/F congeners in the sediments varied between 0.45 and 255 ng WHO2005-TEQ/kg dry weight. Pollution mapping shows that PCDD/F levels in the central section of Izmit Bay are much higher than those in the eastern and the western sections. Sediments collected from the northern part of the central section showed very high PCDD/F concentrations. The samples reveal three different congener profiles dominated by OCDF, 1,2,3,4,6,7,8-HpCDF, and OCDD respectively. The dominance of OCDF in the sediment samples taken from the central section was attributed to the former production of vinyl chloride monomer in the area, while that of 1,2,3,4,6,7,8-HpCDF was attributed to the (previously unknown) use of a chlorophenol-based fungicide in the region. The OCDD dominated group was explained by the use of pentachlorophenol. The results indicate that historic industrial discharges are the main contributor to the PCDD/F pollution in the sediments.
本研究评估了土耳其伊兹密特湾（Izmit Bay）表层沉积物中的二噁英/呋喃（PCDD/F）污染情况，并评估了 PCDD/F 输入该海湾的可能来源。结果表明，沉积物中有毒 PCDD/F 同系物的浓度在 0.45 至 255 ng WHO2005-TEQ/kg 干重之间变化。污染图显示，伊兹密特湾中心部分的 PCDD/F 水平远高于东部和西部部分。从中部北段采集的沉积物显示出非常高的 PCDD/F 浓度。这些样本揭示了三种不同的同系物分布模式，分别以 OCDF、1,2,3,4,6,7,8-HpCDF 和 OCDD 为主导。中心部分沉积物中 OCDF 的主导地位归因于该地区以前生产氯乙烯单体，而 1,2,3,4,6,7,8-HpCDF 的主导地位归因于该地区（以前未知）使用含氯酚类杀真菌剂。OCDD 主导组则归因于五氯苯酚的使用。研究结果表明，历史工业排放是沉积物中二噁英/呋喃污染的主要来源。
