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本研究的目的在于寻找流入里加湾(波罗的海的一部分)的聚氯联苯(PCBs)的潜在来源。在拉脱维亚的道加瓦和利耶卢佩河中的河鲈体内,定量检测到PCBs,DDT及有关化合物,六氯苯(HCB),二氯苯基砜(BCPS)及两种六氯环己烷(HCH)异构体。利耶卢佩当地的PCBs污染很可能来源于叶尔加瓦城市地区。进一步在利耶卢佩河下游检测到BCPS的浓度由53ng/g升高到160ng/g脂肪重(1.w.)。当地的p,p’-DDT和HCHs污染源似乎构成了里加首都地区下游的道加瓦河的背景污染。河鲈体内有机氯的浓度与波罗的海其他受污染地区河鲈体内报道的浓度具有相同的范围;例如,已确定PCB含量为250～1100ng/g 1.w.。
The purpose of this study was to find a potential source of polychlorinated biphenyls (PCBs) that flowed into the Gulf of Riga, a part of the Baltic Sea. PCBs, DDT and related compounds, hexachlorobenzene (HCB), dichlorophenylsulfone (BCPS) and two kinds of hexachlorocyclohexane were detected quantitatively in the perch in the Daugava and Liebelpepe rivers in Latvia (HCH) isomer. The pollution of PCBs in Liberia is likely to come from the urban area of Yelgava. Further concentration of BCPS was detected in the lower Liebelhup from 53ng / g to 160ng / g of fat weight (1.w.). The local sources of p, p’-DDT and HCHs appear to constitute the background pollution of the Daugava River downstream of the Riga capital. The concentration of organochlorine in the perch has the same range as that reported in the body of the perch in other contaminated areas of the Baltic Sea; for example, it has been determined that the PCB content is 250-1100 ng / g1.w.