Study on the Interaction between Heavy Metals and Organic Matter in Municipal Solid Waste Incineration Residues in Landfill Sites

结果表明，垃圾填埋场中腐殖质含量在200~1100 mg/kg之间，有机物含量较低，主要以生活垃圾残渣为主。填埋后pH的变化对有机质的淋溶能力影响不大，但对HSS的淋溶影响不显著。垃圾填埋场渗滤液中还含有腐植酸(HA)和富里酸(FA)。垃圾成分对渗滤液中HSS的浓度有很大影响。填埋场的龄期对HSS的浓度也有影响，考虑到随着时间的推移，HSS的浓度会因为HSS的降解而趋于下降。也可以发现HSS，特别是来自垃圾填埋场的渗滤液中的SS。对从填埋垃圾中提取的HSS的化学和光谱特征进行了表征。FT-IR谱图显示了与HSS相似的结果，并且在FA的情况下，检测到了COOH基团的化学更强的键。从提取的HSS的CP-MAS和13&GT；C-核磁共振结果中发现，与其他来源的HSS、粉碎的不燃物和垃圾填埋场渗滤液相比，MSWIR提取的HSS具有独特的核磁共振波谱峰形。对FA的电位滴定结果表明，FA具有聚合物电解质的离解性质，其表观酸离解常数分别为2.84(44%)、4.02(34%)和4.97(22%)。从垃圾填埋场中HSS的连续提取结果和与堆肥后的污泥混合物中HSS的连续提取结果，探讨了考虑HSS存在的垃圾填埋场的前期稳定化问题。

It was confirmed that humic substances (HSs) were formed with the range of 200〜1,100 mg/kg-sample in landfills mainly disposed with MSWI residues and with a low content of organic matters. Leaching capacity of organic matter was little affected by pH variation after landfilling, but there was no significant effect of pH for HSs' leaching. Humic acid (HA) and fulvic acid (FA) were also proven to be present in MSWIR landfills leachate. The waste composition strongly influence over the concentration of HSs in leachate. Also the landfill's age influences over the concentration of HSs considering that in time the concentration tend to decrease because of the degradation of HSs. HSs also can be found, especially in SS from leachates originated in landfills with MSWIR. The chemical and spectroscopic characteristics of HSs extracted from landfilled MSWIR were characterized. FT-IR spectra showed the similar results of HSs, and in the case of FA, chemically stronger bond of COOH groups were detected. From the results of CP-MAS ^<13>C-NMR of extracted HSs, it was found that HSs derived from MSWIR have its specific peak shape of NMR spectra, comparing with HSs derived from other origins ; crushed incombustibles, and MSW landfill leachate. From potentiometric titration for FA, it could be concluded that FA has a dissociation property as a high-polymer electrolyte, indicating that an apparent acid dissociation constant (pK_<app>) of FA extracted from landfilled MSWIR distributed with 2.84 (44%), 4.02 (34%) and 4.97 (22%). It was discussed about the landfill stabilization at an earlier stage considering on the existence of HSs from the results of sequential extraction of HSs in landfilled MSWIR and the mixture with composted sewage sludge.