Asakura Hiroshi, Matsuto Toshihiko, Tanaka Nobutoshi
Division of Environmental and Resource Engineering, Graduate School of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo 060-8628, Japan.
Waste Manag. 2004;24(6):613-22. doi: 10.1016/j.wasman.2004.02.004.
Endocrine-disrupting chemicals (EDCs) in landfill leachates and the effluent from leachate treatment facilities have been analyzed by many researchers. However, seasonal and yearly variations and the influence of landfill age are still not clear. In this study, leachate was sampled on four occasions each, at different seasons, from two MSW landfills which receive different waste material. Then, the quantities of alkylphenols (APs), bisphenol A (BPA), phthalic acid esters (PAEs) and organotin compounds (OTs) in leachate were determined. By sampling leachate from landfill cells of different age, the long-term behavior of EDCs was studied. Furthermore, leachate was also sampled at different points in the process of a leachate treatment system, and then the behavior of EDCs in the facility was studied. The concentrations of APs were as low as in surface waters, and OTs were not detected (detection limit was 0.01 microg/l), while BPA and DEHP, which were the most abundant of the four substances measured as PAEs, were found in all the leachates that were measured. Concentrations of BPA and DEHP were almost constant regardless of season, except for a couple of low concentrations observed for BPA. The varying composition of landfilled waste did not influence BPA and DEHP in leachate. Concentration of BPA in raw leachate tends to decrease as the years go by, but the concentration of DEHP was observed to remain at a constant level. BPA was considerably degraded by aeration for leachates from the two landfills, except when the leachate temperature was low. Aeration, coagulation/sedimentation, and biological treatment could not remove DEHP.
许多研究人员已对垃圾渗滤液及渗滤液处理设施的排放物中的内分泌干扰化学物质（EDCs）进行了分析。然而，季节性和年度变化以及垃圾填埋场使用年限的影响仍不明确。在本研究中，从接收不同废料的两个城市固体废弃物（MSW）填埋场，在不同季节各进行了四次渗滤液采样。然后，测定了渗滤液中烷基酚（APs）、双酚A（BPA）、邻苯二甲酸酯（PAEs）和有机锡化合物（OTs）的含量。通过对不同使用年限的填埋单元的渗滤液进行采样，研究了EDCs的长期行为。此外，还在渗滤液处理系统的不同点采集了渗滤液，进而研究了EDCs在该设施中的行为。APs的浓度与地表水一样低，未检测到OTs（检测限为0.01微克/升），而作为PAEs测定的四种物质中含量最高的BPA和邻苯二甲酸二（2-乙基己基）酯（DEHP），在所有测定的渗滤液中均有发现。BPA和DEHP的浓度几乎不受季节影响，只是观察到BPA有几次浓度较低。填埋废物成分的变化并未影响渗滤液中的BPA和DEHP。随着时间推移，原渗滤液中BPA的浓度趋于下降，但观察到DEHP的浓度保持在恒定水平。对两个填埋场的渗滤液进行曝气处理后，BPA有显著降解，但渗滤液温度较低时除外。曝气、混凝/沉淀和生物处理均无法去除DEHP。
