Persson N Johan, Pettersen Harald, Ishaq Rasha, Axelman Johan, Bandh Cecilia, Broman Dag, Zebühr Yngve, Hammar Tommy
Institute of Applied Environmental Science (ITM), Stockholm University, SE-106 91 Stockholm, Sweden.
Environ Pollut. 2005 Nov;138(1):18-27. doi: 10.1016/j.envpol.2005.02.021.
Approximately 80,000 kg polysulfide sealant containing 10,000-18,000 kg polychlorinated biphenyls (PCB) was deposited at a Swedish municipal landfill station during 1965-1973. Investigations during 1994 showed that soil layers underneath the landfill had concentration of PCB not alarmingly high. The concentration of PCB congeners in ground water samples was elevated 4-750 times compared to a reference sample. Based on samples of ground water, leachate water, and flux chambers measuring evaporation of PCB from the landfill surface, the emission of PCB was estimated to be 1 g sigmaPCB/yr. This very low rate was attributed to the high sorptive capacity of the sealant. Compared to a reference site, the evaporation flux was elevated for the most volatile congeners, but factors 20-1400 lower than from another landfill which was contaminated with PCB in paper-pulp fibres.
1965年至1973年间，瑞典一座城市垃圾填埋站堆放了约80,000千克含有10,000 - 18,000千克多氯联苯（PCB）的聚硫化物密封剂。1994年的调查显示，垃圾填埋场下方的土壤层中多氯联苯的浓度并不高得惊人。与参考样本相比，地下水样本中多氯联苯同系物的浓度升高了4至750倍。根据地下水、渗滤液样本以及测量垃圾填埋场表面多氯联苯蒸发量的通量室的数据，估计多氯联苯的排放量为1克∑多氯联苯/年。如此低的排放率归因于密封剂的高吸附能力。与参考场地相比，挥发性最强的同系物的蒸发通量有所升高，但比另一个被纸浆纤维中的多氯联苯污染的垃圾填埋场低20至1400倍。
